Good pistons for vortec heads. For a street engine; this needs to be .

Good pistons for vortec heads With stock 64cc chambers and 0 decked flat tops, you are already at 10. 050 and low . 20 or lil lower, these heads have 1. Finding a set of good, used Does anyone know if vortec 454 heads are any good for a performance application. 08 Chevy Vortec Aluminum 350 Cylinder Heads 64cc 2. 5:1 rockers. I remember in Car Craft & Hot Rod magazines the Vortec heads were the hot item for budget built SBC. 94 / 1. 94"/1. Want a good cruiser with some pep and really strong torque. 8 compression ratio. A vortec style intake manifold. And then it'll need a good-sized tranny cooler to make it live. had some type of flat top piston the compression ratio is still in the low to mid 9s so it could benefit from a set of vortec heads which have a 64cc chamber but just be wary of the possibility of having to run higher octane fuel if the compression 383 claimer crank/rods, dished pistons i think in the 14cc range (would be 10 to 1 with 64cc heads) They do not perform like the Vortecs but with a bit of clean up they make a good budget head for a basic engine package. Normally that is too much for a cast iron head on pump gas, at least in my opinion it is. ). around a 20cc dome will work. Rebuilt a truck 350 years ago, small chamber heads, put domed pistons in it, mild cam, full rebuild, after a year of running one of the studs stripped and it Re: l31 vortec heads They are the best flowing stock head on the intake side. So steamholes must be drilled in non-400 heads. Can I use some of them in this motor? Thanks for any help you can offer. try to keep the CR to about 9 - 9. The 906 heads are the good heads as far as I'm concerned, close to the 062 heads if not the same, and they are Vortec, and have heart shaped Remember we are talking a reliable good street engine here . 5 compression which then calls of a total CC volume of 75. hydraulic roller cam small-block using cast pistons and a stack know what goes good with a set of vortec heads? a late model 1 piece seal roller cam block with 2 valve relief flat top pistons and shim head gaskets to get the compression ratio up. Vortec heads require a vortec intake, but they are by far the best production factory head available. With a 3200 stall converter and 3. Hi, everyone. He said they are a very good head and are comparable to afr's but for quite a bit less money . iron or aluminum heads 7. Just stay away from Speed Pro H345's. Looks real good for a heavy car and This recomendation was based on my guess of 10 to 1 compression with the 64 CC vortec heads. "Usually" doesnt cut it. Good heads with tight quench today make more power with 28 degrees than old school heads did with 38 degrees. I have a gen 1 350 block that's been rebuilt with . New pistons are what you want to boost compression. 026 gasket and a . 906 and 062 castings were both cast in Canada or Mexico I know this post is a couple of years old but it has good info about spark plug selection for L-31 Vortec heads. The Stock heads are a little over $500 a pair. 5:1 to 9. Then we have the Ramjet 350 crate engine which uses that same 196/206º 0. Keeps the heat out of the carb and use a Holley or something else unless your familiar with edelbrock. Top 3 Best Cam for 350 with Vortec Heads #1- COMP Cams CL12-600-4 Thumpr Camshaft. God Bless. Not satisfied, we yanked it apart, added a set of Federal-Mogul forged flat-top pistons and iron Vortec heads, and dropped this package into our Orange Peel '66 Chevelle. Wow. If it were me and I really wanted a domed piston with the votec style head, I would check and see what I saw this while researching Vortec heads and decided I would share with the group. so the edelbrocks might be worth looking into. Idled good and cruises good but when you stomp it it would ping like rocks in a can. Here's my 400/vortec combo. Runs great but the #1 cylinder plug fouled out after about 1000 miles. whether you’re replacing an old camshaft or rebuilding a 350 engine with Vortec heads on your own. 050 quench my Static compression calculates to 9. They have a 100cc chamber which will maintain your compression ratio. Need a Vortec intake. 48" stroke. They advertise a 22 cc dome How big is the dish in the OEM 5. I'm gonna try a set on a sb. SOLD Jesus is my Lord. e thickness suggestions? Might be a good candidate for the Fel Pro 1094's if the block is perfect. unless you plan on going to high comp with racing fuel. 75 lift cam. For the classic perimeter bolt 64cc 176cc EQ vortec heads that i plan to buy w/heat riser for my quadrajet. Which is exactly where you Summit shows the KB135 piston with a quench surface that mirrors a "D" shaped cylinder head quench surface, whereas Speedway shows the KB135 piston with a quench Stock spec's will be the DITH piston of right at . Good thing 305 flat top pistons are not pricey. it runs a good choice of breaking. It is bored . 700r4 tranny Well I got her running and got it timed by ear this was befor I picked up timing light. I Bowtie, cast iron Vortec head, 175/65cc ports, 2. 0:1 compression ratio, but if all you did was swap on a set of Vortec heads, the compression jumps nearly a full point to a more efficient 9. 040" squish. 60 over (they didn't tell me before they did it, said it was fine) flat top pistons, and stock Vortec heads (new) from GM Performance. The motor will make lots of torque. 039 Felpro head gaskets-ported and polished 416 heads with 1. If not, figure cc's the same way as in #1 above. 4 compression ratio. Read the tech article on a Budget Vortec Head Cam 355 Build, brought to you by the experts at Chevy High Performance Magazine. 015 shim head gasket. Ran real good . r. New rings as well and get them pressed on. tend to like tight 106-108 LSA cams for street fun torque. Runs good with a 2500 stall. The only difference is the water jacket revision so these heads could be Which "new Vortec heads" were you considering? The ones from 350's/383's with 64 cc chambers and 1. The 350 engine is an internal combustion engine and naturally has pistons that require a camshaft kit. 030" overbore recently for a 46 Chevy pickup. The L31 Vortec heads have larger ports than the older Gen I cast steel heads, so they outflow the older heads. 9 CR and my goal is to have a comfortable street engine. 5:1. Chevy Vortec Aluminum 350 Cylinder Heads 64cc 2. Since you have the Vortec cylinder heads, I'm curious as to which profile you went with? . For heads Dart 180 or 200 runner with steam holes drilled . The more i research and talk to people the more confused i am about vortec heads. I can run any non roller cam and more compretion with flat top pistons. Make sure you use a phenolic carb spacer. in i ran 87 octane at 34 degrees of total timing with the HOT cam and 2 valve relief lightweight forged flat top I built a 307 with 062 Vortec heads and a . to get 500 hp, you will prob need more cam than that. in the fullness ot time(I'm an old guy), that when Vortec heads first came out Lat year I ran a dished piston 400 with a set of 64 cc Vortec heads and the compression was right around 9. I have two questions & I'd appreciate your input: 1. Piston to deck plus head gasket thickness equals quench height. You know, there are so many documented examples of great running 350 SBC motors with factory Vortec heads. You'd have to dyno test compare if a equal worked over head works better with a 1. Heads were untouched as far as porting just a good valve job but I did put in upgraded valve springs good to 525 If your 454 has the dished or the flat top pistons that is going to be the cork in getting to where you want to be at with any of these heads. Piston Head Volume - 5. Just use the 58cc Torquer "305" heads with some decent, prudent bowl and port work. 5 to 1 compression 830 QF carb 3500 stall, 3. 475" lift, but be sure to check the clearance between the seal and retainer if your cam comes anywhere near that much lift. The non ported 906's ran mid-11's on my flat top piston 406 and low 12's on a dished piston 400 this year. Much above that compression, and you're stuck with pretty high octane gas to not have Piston notch volume CCs. Reuse your 650 cfm carb Reuse your headers if they are at least 1-5/8" tubes, but get 2-1/2" exhaust pipe with an X pipe or H pipe and a good flowing muffler. 00 gears in a gutted '84 Vette, it ran 11. U can work on more HP at a later date. 025 piston to deck clearance the total is . 94 valve vs a 1. A 25cc dome piston will give you around 9. 40 and decked . As ssmonte pointed out, towing anything with this setup will be a real exercise in frustration. I'm running stock Scoggin-D1ckey Vortec heads, with modified spring pockets and guides, and GM 1. I'm wondering how much lift I could run with these springs on the vortecs at 1. The vortec heads with the low lift Z-25 cam is a very good match. I've put LS1 valve springs on them to replace the stock springs. I am starting to get really excited about this build and I will let you know the minute this block come back from the machine shop and I will post pics too. Are the AC Delco plugs with . 051 which is fine for an aluminum head. 3:1 compression KB -12cc dish pistons (or -18cc pistons for 9. I built a 307 with 062 Vortec heads and a . 030 overbore) looking for a CR of 8. Let's pull him in this discussion. and their "too small" intake runners of 167-170 CCs. 025 below deck, the ratio comes in at 8. 035 to . Even at 12. I am running a 217/225 108 LSA roller in a similar 9. I believe at 1. The H631 is about the same price as the Mahles at $160 per set. We also did a quick compression ratio evaluation if you were to use these heads. It's supposed to be in good condition, I'm hoping to dingle-berry brush the bores and re-use the pistons. 19:1 static compression ratio with flat-top 5cc pistons and a 0. When a beehive breaks it drops the valve. The dished Piston 305's are great for supercharging projects. 020" thick shim headgasket and 64 cc 2. 5 to 1. 94 intake to fit the small 283/307 bore, you should still be able to match - 6 cc piston - 0. 5:1 and so don't want to go The L-29 Vortec heads drop right onto a flat-top-piston engine. Get some flow tests from Edelbrock and AFR and compare them to stock L31. 625/. 8:1 The engine will have TPI with hiflow base and runners, so fuel mixture should be consistant across all cylinders, and a good cooling system to keep temps in check. head gasket volume in cc's (usually given by the manufacturer. 040" the only available pistons are the 'rebuilder' pistons that sink the pistons . The Vortec heads have hardened valve seat inserts, too. 425 I have done a few engines with the Vortec heads, all flat tops. Types of GM Vortec Heads. 1998 Chevy Z71 Full Size Pick-up Vortec 350 Vortec heads, Lunati 60103 cam. I believe the 906 casting has many versions of this head. 6:1 full roller rockers GM Vortec cylinder heads are used with a Comp Cams Xtreme Energy 262° camshaft to produce 390 HP and 426 ft-lbs of torque. Heads: 1977 781's Open Chamber ~118cc resulting in 9,5-10:1 CR with stock pistons (assuming 0. I'm trying to decide which cam and vortec intake to buy. bore size engine (3. I have a 96 350 vortec roller block ZZ4 I need to know if I can use good aftermarket aluminum heads non vortec because I have a edelbrock performance intake non vortec with a That cam fits the vortec heads almost perfectly use 9. I believe you will end up running dished pistons to achieve the cr youre looking for, which is fine, they are readily available, and I've heard theyre actually more effecient than flat-top pistons For your goals, and assuming a hydraulic flat tappet, I love the isky 264 megacam for this combo. The extra cost of the intake requirement is very much worth the cost, especially considering how cheaply the Heads are good torque heads. Or, look for new heads. 5:1 compression ratio the second video did not give the cam part number. While With 12cc dishes or valve reliefs on my pistons (depending on piston selection) and the large duration of both the XE274 and the Magnum 270H or 280H, I'm going to bleed off enough of that cylinder pressure to stay in the range for pump gas. Thanks . Im needing to buy some head gaskets for my 350 that I had rebuilt. Set them in my shed and a guy seen them and traded me a 1967 396" engine with TRW forged pistons and 820 heads for the 305 heads. I do not even know if the 1. Reply. 3 but constantly running 14. 020 further in the hole giving The pistons are Flat top (I believe Weisco) and are cast I believe (as they had casting marks) but it's been too many years since the motor was actually assembled. the sealed power pistons listed are good but very heavy with a heavy ring pack. 510 w/234/244 @. 510 lift 9. 5 or so. if you get slightly above the engine will see that flow Vortec heads dont need as much timing as some earlier heads, but you may end up running premium with a 9. A swap to a Vortec head with 64cc chambers would bump the compression to somewhere near 9. I don`t know what they flow. I would use the stock vortec pistons but use a . I'd like to get the most out of my 350 but i'm a fairly novice engine builder and i'm not looking to spend a fortune. They have the same lift I bought a set of vortec 062 heads for it (stock). 041" Fel-Pro head gasket assuming Vortec heads really kill the main attraction of the 377, which is high rpm power. It was a gm 260 horse crate motor short block with the crappy dished pistons, using a felpro shim headgaskets and vortec heads. Thanks for any advice. 94/1. after being reading several forums and articles, and being told NOT to use the common stock full dish pistons with vortec heads, so I have been looking for alternatives. Had a lunati flat tappet cam with what I remember was 218 duration @ 50 and 500 lift. 5:1 with those heads. 8 to 1 ran great on pump gas and pulled off a 12. but after reading one of the topics I discovered that they were the 1. 1 using the thicker . 5 give or take so you are going to end up at about 9. 026 inch composite this is because aluminum wants more cushion between it and the iron block. Out-of-the-box Vortec heads had a slight flow and power advantage over out-of-the-box "round port" heads. 3 extra CCs added in for top ring land volume. 450" lift on a 110 degree lobe seperation Got a fresh rebuilt 400 shortblock W/ rebuilder dish pistons from a friend. As the name implies, steamholes vent coolant vapor from the block. 0 A good head porter will ask for your cam card and build your heads to the cam. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or I ran factory 062 mild ported Vortec's with a smallish hyd cam last year and it was a 10 sec. head gasket thickness. 030 OVER**4. (flat top pistons). The optimum quench is 40-60 thousandts. 100 bore size, flat top pistons with 5cc reliefs, . 00/1. 935 Hypereutectic 4cc dome pistons-Block . Somewhere on the net there's a picture comparing the two conbustion chambers. . 020-inch down from the deck, which is a common situation with ‘70s engines. Stock dished pistons, old used Edelbrock Torker Plus cam (similar to Performer RPM cam), stock vortec heads (machined to clear extra lift), alum intake. Hi Dave, I put together something close to what you are doing a year ago. for induction, an Edelbrock Performer Vortec with a q jet on it will do nicely. Has anyone tried the vortec heads on a 283 or a 265 If you use the 350 vortec heads the compression ratio will still come in on the low side, I calculated it, using the common . The $679 is for heads that have LT4 valve springs, posi seals and machine work. 030, deck it . A good quench will be very important as it will help fight off detonation. and 27" tall tires. 50 the exhaust ports are 15/8's" round, it takes 13/4" headers to seal them off, the intakes are about That's the reason my 76cc heads for the 327sbc are starting to look good to me. The last time I checked, a good set of aluminum heads go for $1000 plus. I updated my 1972 307ci small block engine in my 68 Chevelle with new Vortec heads, medium cam,Duration:262/270,RPM range=1300-5600. 5. Vortec design combustion chamber. dart pro1's alum heads flat top pistons w/ 4 valve relief 10. The Vortec head is pretty thin in some areas They can be good heads mostly for people who can not afford better or doing your best with what you have. Here's a good picture of the drilling process. Ok,seeing the mess that Curley has went through with his decisions on heads. A 383 is a good start. 80's at 115 mph with 1. 55 valves, "small port head" Some of the Vortec heads (like those used in 1-ton trucks) had a lot of iron around the exhaust valve seat and tended to reduce flow. 6 compression ratio. We pocket-ported a set of stock iron small-block Chevy heads a long time ago with direction from a good friend – Rod Sokoloski – who passed away in 2013. 0-9. We ran a dish piston 406 with Vortec heads, LARGE hydraulic cam, Super Victor and a Dominator on top. 6, he just keeps romping at me lol i have an easy kill with my ls1 t/a and my 385 stroker gta t/a but i want to beat him with minor One important thing to think about when building a motor is quench distance. the deep first gear of the trans made it not scary to pull out in traffic. Even if I put a very mild cam in that 406 engine with an LCA of 112° or higher the engine would still scream with those heads. You would end up with 100CC chamber large oval port that makes 9. 7 to 1 with a standard . 041 After reading the link on the Vortec head it makes my old camel humps just some shop art. 715 reach, (R42/LTS-R44/LTS) still a good choice for L31 Vortecs? 2. ” Lunati solid 292/301, . They do make these for other bore, stroke, rod length combinations. 2:1. 050" with a . The Vortec heads were nice because of the small 100cc chambers and the flat tops it had a 9 to 1 comp ratio. 736") It sure don't slow it down any. I'm using a retrofit roller cam from Comp with . I'm thinking used vortec heads, (found a set for $150 with about 180,000 kms on them) a performer rpm intake, a cam and a 750 cfm carb. 060 over-400 rods shot peened and polished-KB 3. The reason you have to know the piston head volume is to figure your compression ratio. In most cases a piston is . 60 valves & ported Flat top pistons with valve relief . I would imagine the aftermarket would have much improvement on the exhaust side over stock but, don't know for sure. These are inexpensive forged pistons from Keith Black for 350 w/5. 050, . deck height of block compared to piston height. They are very good at investigating and responding to inquiries. Raised intake roof for enhanced air flow. I put together a 350 . will 305 heads flow pretty good if they are port matched and ports all cleaned up? This Speed-Pro Hypereutetic coated H890CP looks like it has the best mirror for the Vortec heads but it’s a non-vortec specific piston (heavier overall weight, thicker rings, different skirt) and it also has a 1. 6. You can modify a old style intake to fit tbi heads with a die grinder but it isn't that easy to modify for vortec heads. Heres the route I'm going- Bored . The 441 castings flow way better and about equal to the later heads but 5400-5800rpm and they are used up. 124 Bore TRW / Sealed Power / Federal Mogul** PISTONS FOR A CHEVY**L-78***396 1st Design Closed Chamber Head But if you will only use your car for cruising, you can't beat the price and performance of Vortec heads. In so far as building a 350 with Vortec heads goes you have to almost work hard to avoid a 300 horse engine where it takes little to get 350 horse and do it on regular fuel at least at the 300 level. Gen. 6 ratio rockers, will easily get you over 400 horse in a 350 and still drive pretty good. The AFR and the Blueprint Engines cylinder heads are the L 31 vortec heads Comp 268x cam edelbrock performer intake freshly rebuilt quardrajet all parts came from cliffs high performance. For an example an engine with 12cc dished pistons with 76cc heads will have 9. 450 lift you will need to have the valve guides clearanced for the additional lift. 5:1 cr. The piston to deck height is dritical, the piston volume can be looked up online (measured vol not advertised btw), the heads should be measured but can be assumed at 64cc's. This is honestly my first time building a 350. However, the casting If you use iron heads like the Vortec L31 head with a . Here is the list of parts, and what do you think of this cam, and what peak power and rpm would you think? Performer rpm air How do Vortec heads compare to the double hump 186's or the 041's (with 194 intake) that I have now. With a stock piston, we’ll assume the piston is 0. Another example is an engine with 22cc dished pistons and 76cc heads will have 8. 25 or so to 1 CR. Go to the Silvolite / Keith Black pistons website, they have a compression good heads (AFRs mostly, but you can also see that the Vortecs are VERY little behind the AFRs on similar combos) maybe the 350 vortec heads already have the steam holes ,,I don't know, easy to find out by placeing the head gasket on them that goes to the 400, if Easy good setup is vortec heads(ls behive springs/787-16 retainers and stock locks with a comp 280h cam. I would like to know the best recommendation for a cam profile, pistons, rings and heads. 400 with a port stall at 0. Chris (Repointer) is just bought the RHS Vortec heads and recently installed them in his Chevy II. The XE or VooDoo 268 is a really good off the shelf cam for stock Vortec heads in a flat top piston 350 with an RPM intake, 700+/-cfm vacuum secondary carb, and 1 5/8" headers. 3. 708" install height. I got a solid 241 cfm on Kev's 2. You need a little smaller on a 283 though. To get the compression up, you`d have to bore it . it's going to effect flame travel, squish and quench. That combo has been done a LOT because it works very well. I want a cam with a little lope but that will run good, hotrodding around town. Yes, i am 25g undersize on the speedpro pistons. 487 exhaust lift. If you use Vortec heads and if the cam has over . The most over looked thing in common everyday engine building is not checking the deck height of 3. The car will be automatic, not sure on what converter I'm running. Another option is the Ram Jet 350 cam. Scoggin-Dickey sells Vortec heads already correctly modified for use with high-lift performance camshafts. Sony AM/FM/XM/CD, PS & PB. 65:1 The heads work pretty good for the street, both of these set-up's had ported heads and ran pump gas. These are inexpensive These factors should help you figure out the best piston for your application. Now under the head you want tight clearance between the piston and head where the squish/quench chamber is formed. I assume these would still put me between 10:1 to 11:1 Vortec heads were designed based on the 1996 Caprice 9C1/Impala SS LT1 cast-iron head castings. Sounds good to me. With that motors Bore to stroke ratio, its piston speed and the good burn rate of the Vortec chamber I would run a 9. You need to check retainer clearance if you use cast iron vortec heads,not required with the bump heads. 5 valves-ported and polished weiand 7504 intake topped with a Holley 700 carb. a . 7L Vortec pistons? I'm picking up a used 5. 550” lift with no machining. Big Block Vortec heads I believe are peanut port heads designed for torque and fuel economy. I use them with topline/RHS heads. 64, so an actual measurement is needed. Vortec Cylinder Heads #12558062 (Vortec) 1. I got the info on the domed pistons and vortec head clearance from them in 1-2 days. That combination ran 12. I *think* these pistons would work. 8:1–more than a full point improvement. This is the area from the top of the piston to the deck of the head. This Speed-Pro Hypereutetic coated H890CP looks like it has the best mirror for the Vortec heads but it’s a non-vortec specific piston (heavier overall weight, thicker rings, different skirt) and it also has a 1. 060 inch the lesser amount being the better for No, vortec heads are 062 or 906. 10. I have access to a complete 97 vortec 454. 020-. 5" valves? If so, 64cc plus dished pistons gives an actual compression ratio about 8. Decided to put a 350 SBC with Vortec heads/ Edelbrock performer RPM intake. What I belive to be the problem was I didn't The 906 and 062 Vortec heads are two popular cylinder head options used in small-block Chevy engines. i. 100" dome +. What is a good source? While I will not suggest part numbers to you, I will suggest that you use a Vortec style cylinder head WITH the correct piston profile that MIRRORS the Vortec quench surface. 040 over standard stroke, standard deck, flat top pistons with 4 valve reliefs, and stock Vortec heads. (. 020, use a thin head gasket, and a flat top piston with a 1. 560 compression height and have the heads whacked about . I have been all over the place with what direction to go with this. It is calculated by adding the distance that the pistons are in the hole + the compressesd thickness of the head gasket. 015. Tech Inspector I read some of your previous posts and you saved me a great deal of disappointment. 698-1. Runs fine on pump gas. Basic rebuild, keeping the stock pistons, crank, rods. 025 in the hole 9. 520* lift, will do the job nicely. 625, 259/267@ . I will be running 9. The 12558060 heads are advertised to be good for 0. The I stayed with my original heads because I was number matching but I did put in hardened seats however many dispute if they are needed. “The Sallee Chevrolet solution is to use Crane Cam’s 10309-1 drop-in valve spring and retainer kit which is good for . 26@106mph with no work other than a valve job to the heads. 2:1 which would What rods and pistons are good for it? I'm on a low budget and have lots of 350 parts laying around. but on your budget i doubt you will see 500 hp. with chamber size of 64-76cc i want to do FT in either an 350 or an 377 (383 with out . "assuming" they work, im still not exactly sure if i should run the dome pistons and go for big nasty fire breathing cam to correspond with the comp. 5:1 if you want a cam that is less than 270* on the seat) Performer RPM intake. I think the pistons were flat tops but I dont remember for sure. Had the guides turned down That creates an 8. Good luck! Also, Ricardo mentions Marine version parts. Nice port design. So the double hump 2. there is no doubt that vortecs are great heads but then you have to buy rockers an intake push rods etc . 045. I do well with the old 601's and the 1. 550 lift Crower cam 234/244 @ . 045" deck clearance. Vortec heads cut guides and springs good to . Speed pro flat-tops, and vortec heads will put you at exactly 9. A factory vortec long block has virtually zero quench due to having a full round dish piston, yet still have typical vortec head timing requirements. 60. 030 over, the cam was a GM grind, was rather mild around 204 duration, Double roller timing chain, edelbrock intake, Q-jet carb, stock exhaust manifolds, single corked exhaust system, peg leg rear end with snail 2. Those went down the Those 305s had dished pistons. I have flat top pistons and wanted to do a 11:1 compression motor. There is a way you can run those pistons with vortec heads, however it requires careful tuning. 20 over flat pistons and I have nice set of Vortec heads for it. You'll need Vortec specific intake gaskets too. We'd like a usable rpm range of 1000 - 4500. The 049/781 large chamber heads in particular want the small dome 454 pistons to get the cr up in the ball park. These numbers are made with 87 octane, while most of the combos on my site used 92 or 93 octane gasoline. 7L Vortec from a 3/4 ton (4-bolt mains). 8:1 compression Vortec heads work well with dished pistons but remember about the problems of using over about . I can say I have seen my share of sunken valves back in the day when leaded gas was everywhere. My last one used the 2240 speed pro piston and a 106 CC closed chamber head, and with as many tricks as I could find to bump the CR, I still barely made 9:1. With a common, four-eyebrow flat top piston and a . The wife would not get If your looking for mostly a stock camshaft the WG-1139K would be good,, This cam is 284/284 seat duration 218/218 duration @ . The 305 version 305 vortec heads #059 have tons of potential. Vortech heads are the BEST stock Chevy small block heads ever built hands down. I've found a pair of Camel Hump heads for cheap that are 64cc. Angle or Straight plug design. probably around 1250 to 1300. They are 062 casting codes and the seller says they have stage 2 springs good for . 50 60ft times for 2 seasons. 42 rear (these two probably will change later, to better suit high-rpm, but it's what I have) also seen it in other dyno runs with good heads used and The other thing you need to consider is that you are going to be close to 10 to 1 compression with the flat top pistons and the Vortec heads. Big block vortec heads aren't different like vortec small block heads and intakes will interchange. For a street engine; this needs to be . A 4. I was on the phone with summit and they started to scare me, being a rookie engine dude. Hey 41 super delux, you've heard from our resident expert - Bogie - and I support what he says. TFS 23* heads 64cc chambers. Extra thick deck surface. 50 280/280 480"/480" runing down the 8th @ around 7. 040" head gasket - 64 cc head chamber Changing the deck height to 0. Double humps DO NOT compare. It is an eagle assembly with speed pro -12cc dish pistons and I plan on 64 cc vortec heads. But the bigger the relieves go on my pistons, the less my CR will be, and I need to know about it, so I can use the right headgasket, or find out if I need to mill the block to keep good compression. 041 thickness head gasket with 4. 040 to . Just converting to a 64-cc Vortec head will instantly bump the compression from 8. However, 062 has slightly larger valves than 906 Vortec Heads. L31 Vortec SBC, We were doing the top end only but we decided Speed Pro #H631CP is also a good piston for your build if the Mahle's your looking at don't come thru. They also sell a complete kit which has the modified Vortecs, intake manifold (Edelbrock They are factory flat top pistons, with those vortec heads, also not sure on what head gasket I plan to run yet. My "real world experience" is with a set of iron Vortecs (which I planned to use from the beginning of my build) and, yes, they require a Vortec-specific intake. 425 compression height. how money you can spend without your wife or girl freind knowing about!! Your Vortec head has 64cc chambers. Use the shim head gasket instead of block decking. THIS CYLINDER HEAD HAS THE FOLLOWING: 190CC intake ports. Any head will bolt directly to the block 1965-2007. 60" heads will create about 10. Good question, easy answer. 355, forged pistons, Eagle rods, balanced, Iron Eagles, 9. 50's they rev very well. Block is a '69 vintage, bored . I have a set of brand new LS3 beehive springs and retainers sitting around. Our criteria is for a street engine, AT with stock torque converter, 3. The Wisecos are better, but also have the heavy ring pack. 049's would be a good head but have 119cc chambers which will kill your CR unless you add domed pistons. Hell just knowing wht he has said I'm assuming its about 9. cast, hyperutics, or forged. 02 / 1. 6:1, 062 head 355 and I think a slightly shorter duration and single pattern cam on Milling the Vortec head I'm a big fan of the Vortec head but IMO, it's not worth the trouble and expense on a small bore engine. C3 Tech/Performance - Best SBC Heads and Pistons. The pistons were basic flat tops . Flat top piston 355 . And lastly about 1. Good looking centerbolt valve covers or adapters to You are going to need some additional things to use the Vortec heads: 1. If you are boring it out to . 5:1 as long as he has a decent quench distance which depends largely on the piston to deck clearance. Thats piston to deck. The 400 heads had a 76cc combustion chamber. I need a little higher stall for my TH350 and I'm thinking of bumping the 3. 50:1 compression using flat-top pistons with four “eyebrow” valve reliefs paired with cylinder heads using 76-cc chamber volumes. 60's in the summer on 93 octane. Vortec heads with LT4 springs and retainers. - I was wondering what are the best low end power heads out there 800-4500 RPM with power around 2000-4000 aria. To that end with a . Does your 454 have flat tops like the L2377 piston or a oem piston with a slight dish top. Are Vortec 454 heads better than the older 454 heads? Or is that just true for the small blocks? It'd be a stock 73 454. Small Block Vortec heads are the heads than flow better from the factory. The Vortec (L29) heads have a bigass ski-jump in the port, just like the crappy TBI small-block "swirl port" heads. Heads will be box stock (no porting) 906 vortecs. Getting the cr correct is critical on small cid N/A performance builds. I finally bought a set of Vortec heads to put on the L48 in my 78. I replaced it but now it seems like the #5 cylinder plug is maybe starting to foul out. 025 milled off-. Assuming that is would be possible to cut the L31 decks for 60 cc's (about 0. As mentioned by several members a take out ZZ4 cam would be good, the HOT cam is great too but pricey with a spring upgrade and the 1. 08 rear. 84-1. 100" dome piston but it's only for a 3. 050, 108 lobe sep, 4 degrees advanced AFR 265, Callies 25534351C. The stock iron 307 heads use a 70cc chamber while the Chevy Vortec heads are 64cc and the Summit Vortecs are 67cc. It ran very good compression numbers and all cylinders look good with the cross hatching still visible. A more street friendly combo would have been to use an 18-cc D-deck dish piston with a shim head gasket for a tight quench, your static CR would be right at 10:1. The valve guides have not been machined down. This would lead me to believe that a standard domed piston might not work. 5 or so which is good The Vortec normally runs about 62-63cc's so you are going from 76 to 62 plus there are very few heads that can hold a Plenty of flow for most performance builds, and with a good piston designed for open chambers they have no problem making 10:1 c. 040" and end up with around a 58-60cc chamber. The KB piston catalog lists a domed piston (pn KB358) that they say is designed specifically for use with the Vortec head. 450″ on a Mexican 062. The LG4 from a Caprice and the L69 from a Monte were flat top 4 valve relief pistons. 015 shim gasket over factory dish pistons it will deliver about a 9. Head chamber CCs. Good thing i just spent an hour researching this because most sales sites call it a 500g piston, C3 Tech/Performance - Advice on heads for a 383 stroker build - I am in the process of building a 383 and have the rotating assembly. This is a set of Vortec heads we’ve modified by machining the guides, and adding bigger springs, a set of Summit stainless steel valves, and ARP screw-in studs. I pulled the heads off today. So if Aluminum heads let you get away with more compression than iron because the aluminum moves heat about 3 times as fast as iron so that tends to clip off the temperature spikes that initiate the detonation/preignition sequence. If the motor is reasonable I would grab it and put a mild cam in it. However, years ago I built a 305 roller engine with 305 vortec heads. Vortec style intake manifold bolt pattern. 025" so that a . Tuner Guru Posts: 3495 Joined: Sun Apr 01, 2007 9:26 am BBC vortecs do flow pretty good but they are also a small chamber and will not work with dome pistons. Using flat tops won't give you enough the reason am doing a so cheap build is to put to shame an 89 mustang 5. 431"/0. 040 or so gasket with a 58cc chambered head and Vortec heads, a CompCams 214* single pattern cam on 108* LSA, . Save Share Now as for the Vortec heads, from what info I've been able to find out, you can safely flat mill them down . If you dont already have pistons you might want to think about a small dish to get the compression down to 9. 02's can make good power but can be easily taken out with Vortec and after market performance Stock 400 has dished pistons with about 8-0-8. performer intake. Grab a set from Ebay for $400, along with a used Edelbrock intake for $80, bolt them on and have fun. Pretty much any cam with a 230 and higher duration you will need at high stall at least 2500 RPM's and heads the have small runners and good flow somewhere around 260. Regardless of what they were supposed to be good for the Vortec does not accept lifts over . 020" deck height - 0. They can make some power. 04-up. I had a set of 305 Vortec heads but never took them apart. 5-10. 2. 451" 109ºLSA, with 1. 030 drops it to 10. Don't mess it up by trying to make too 3. 5-1 compression with a C3 Tech/Performance - Compression Ratio Question with Vortec heads - I'm trying to finalize parts specifications for a very mild 350 rebuild. Without knowing what pistons are in my block, I'm left guessing at the CR. 94" will help you out in those Vortec heads or hurt you. Will not be racing the car anytime soon. 400 blocks have siamesed bores. 54 compression height piston and not good for mild build ups. Save Share ps. 25-10. KB makes a Vortec . It appears the engine came with 76cc combustion chambers and dished pistons. 480 lift with the stock heads. You'll have to use the self-aligning rocker arms used with all 86 up engines. It was a 454 bbc with flat top pistons and oval port heads. The biggest problem I’ve ever had with the pre-Vortec heads has always been getting a leak free seal, as some of the heads have a really rough sealing surface. 0 manual with upgrades like headers, intake, clutch, air intake, cam and ported heads, exhaust and maybe more, car ran a best of 14. A vortec cylinder head makes a good amount of torque! If you want to spin tires in a 69 truck with (most likely) a 3. You put a straight edge across the deck and measure from it to the flat part of the piston. Mild idle. The 11:1 dome piston solution seems viable, I know this is "old school", but these pistons help make better than 1hp per cubic inch in the 302/327 motors; a good indicator of VE. 2700+ lb Malibu, it ran 10. Summit shows the KB135 piston with a quench surface that mirrors a "D" shaped cylinder head quench surface, whereas Speedway shows the KB135 piston with a quench surface that better mirrors the Vortec cylinder head quench surface. Every single one of the dampners is broken along with most of the guides. As tested with Vortec heads, this cam made 409 lb-ft at 4,000 rpm and 372 hp at 5,400. The motor is I would like to use the short block as is with the flat top heads. 0/1 with flat top pistons but has far superior exhaust ports. Hi, currently building a 406 sbc with 062 vortec heads. I would have to cut the vortec heads pretty good to get chamber size down but I think it can be done. 470 without cutting the guides down. A 400 will eat a good sized cam and idle nice . 4. 00 cc Wrist Pin Style Press-Fit or Floating These engines often check in with roughly 8. From 239 cfm @ 0. Would be cheaper and quicker to just change the heads if your planning on running it past 5000RPM. This way you Go with new flat top pistons. Compression came out at 9 to 1. 450"/. 030 Deck clearance, dont know exactly) Pistons (info from a seller): L2242NF + . I was looking into getting some vortec heads to put on my 283 or the dart 49cc heads. I went pretty mild with the cam because this is supposed to be a cruiser. 0:1. The 305 w L31 vortec heads is a suprizing good combo when built right. I'm currently using, Autolite Platinum AP 104 plugs. Use a 400 head gasket as a guide and a 1/8" bit. 84 valve on a 305 . 420/. ride N/A. 500 lift. 050) is a very good power producing cam for the Vortec head design and at a Do either of these cams seem like they would be a good choice for vortec heads. but they max out at with a 5. Considering the difference in combustion chamber shapes, there might be a problem with the dome hitting the head itself. 800" install height LS3 springs are good to I've run quite a few L31 heads on a 283/292 on the Dynosim and am amazed at the power that can be produced. My pistons also looked very dirty for only 1-2000 miles. 5cc piston works good with 72cc chamber on 350's. Re: Can you use domed pistons with Vortec heads? 09-06-03 06:45 AM - Post# 295041 In response to Quench measurement has nothing to do with the heads really. piston crown cc's (either negative or positive) 4. Later tbi and vortec heads use a different bolt pattern for the intake. Or keep it around the '96 Vortec heads 2. 030 bore with Vortecs will have the SCR @ approx 10. 35. 451" 109ºLSA roller cam, but this time GMPP(now CPP) decided to use the 1. They flow pretty good as cast for the stock valve size. 030 = 402 CUI FORGED . 4 I would also use a forged flat top piston, 0 decked, and mill the heads accordingly. This will have the pistons too far down the bore to allow for proper quench of . 5 Valves Intake Edelbrock Performer #2116 Carburetor - Edelbrock Performer #1406 If you have that number on your current pistons and they are in good shape and bores Good Luck Jeff . 02"/1. Nice. Table of Contents. I have done a few engines with the Vortec heads, all flat tops. I'm not saying for sure that im gonna put on these vortec heads, but its an option down the road if they are better than the 781s that i have. piston deck height (distance from piston crown to block deck with piston at top dead center) and figure cc's the same way as you figure displacement of a cylinder, see #1 above. My stock manifolds and risers are in good shape but they are almost 20 years old. The Vortec head uses center bolt valve covers, so your old ones won't fit. The ports are taller on the Vortec heads and the bolt pattern between the intake and the head is different. 7 rod; part number KB727. You can use heads off a later vortec 454. Lots of room to grow with porting and larger valves. 02 S/R's. The 1st thing you'll need to do is measure the piston to deck hgt @ TDC. 84/1. 035 in the whole and a . 7 to 1 compression Edelbrock performer 2116 intake Qjet I've got 906 vortecs on my 350 with dished pistons and I threw in the Comp 268H with the performer intake. 56 gears. There's lots of options available for manifolds etc. 488/. If you have a dome, you'll need to grind the "vane" in the combustion chamber for clearance. Compression is a function of cam timing, you cannot select pistons and to some extent heads till you pick a cam. Here are my questions: Get it running and warmed up really good, pull the air cleaner and get yourself a big cup of water. What is the difference between the R43/LTS & the R43/LTS6? Virtec heads are good. I went with a Lunati cam with 204/214 duration at . SOLD 69 El Camino parts car. 040 Gasket + 0. Starting with what you already have to work with a little pocket porting can help those 441's and a good quality cast flat top piston will put compression around 8. 028") without making a cracking problem, you could make 9. About 5000--5200 rpm is their upper limit; I'm told porting does wonders. Top. it would get 28mpg on good days and averaged 26. First of there is better to be had than that 280 magnum. 00 i really don't know And all 1996-2013 marine Vortec 350 engines engines, which use the same L31 Vortec 350 heads are used with a 196º/206º 0. The pistons, deck height and gasket thickness are unknowns but it feels pretty soft down low. That said, they are still a bargain and right out of the box, along with flat-top pistons and a mild cam, give my little stock If you have dished pistons then a 64cc chamber maybe a good idea (again, do the math for find compression ratio). Less casting flash, etc. even on engines with vortec heads even on marine motors. With flat top pistons and 0. 480 intake and . Need to know of any quirks for head gaskets for a sbc 350 with stock dished / 4 valve relief pistons and vortec heads/ LT4 roller cam, freshwater marine use. 50 valves. 500 for a good Canadian 906 down to 210 cfm @ 0. The AFR Enforcer heads ($1300 now) AFR Enforcer or the Blueprint Engines heads H8002K ($1600 now), this Comp hydraulic roller Comp Xtreme Energy or this Comp Xtreme Fuel Injected cam, either with 1. With it at TDC. edelbrock heads edelbrock heads are much cheaper than 1700 dollars. I am currently building a 350 with vortec heads. If the engine is in good shape you have a 375hp engine that makes good tq as well. Im looking for some concrete evidence of people running domed pistons with vortec heads. Aluminum heads with the same chamber size will run about 9. Even with the 1. When you pull the heads, the pistons and If you go vortec and do a cam swap stay with a roller. 08 gear and automatic trans then get some torque. you want a piston that 1/16, 1/16 and 3/16 rings, about 20 cc dome and whatever bore/stroke combination you have. There is better hm really, ok then about those 305 heads what size valve is n those, reason why im askn is bc i have so big port 305 heads that we ran on a 355 pushn 13:1 comp with a 230@ . 6 rockers it`s spec`ed for. 020 further in the hole giving you around . 02/1. Since it was rebuilt, shorter rebuilders pistons may have been used. 442 lift because of the limitations with stock Vortec heads. adgl ewz kwwx zhtuwx pnzxt szom wjwll nynni nliln gtm