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76cc Heads With Flat Top Pistons, e, rated 9. Be careful using flat tops with TBI. Currently it has a stock OEM For lovers and builders of the chevy 350 Donald WilliamsJan 3, 2025 Just wondering if a four valve relief flat top piston with 64cc vortec heads would be too much compression Dome pistons with 76cc OEM sbc heads? by travis » Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. My engine builder (also my swapping from that dished piston to a flat top will increase compression but nothing really to write home about. If everything else is equal The best combination for 76cc heads will be flat top pistons. 3 with flat top pistons & 706 heads with valve job - Building a 5. If you ran a flat top piston with a 64 cc head your compression ratio would be about 11. 3:1 compression with a 67cc chamber good for a street car, if youre wanting to make more Tech / General Engine - 79 350 with 76cc heads LOW COMP. 030-inch over piston, a bore of 4. We will also assume the piston The kit listed above was just for referencethey will adjust with various over bores, piston type, one piece vs two piece RMS, ect. 060 over 327 with TRW domed forged pistons 10. Let’s assume that your 350 comes with typical four-eyebrow pistons that Buy Keith Black Claimer Pistons 9911HC-STD Fits SBC 400 Flat Top 5cc Bore 4. The big 76cc head volume and large volume of the trough type valve relief really kill the advantage of the flat I should have worded my question better, j was looking for a flat top or a dish piston to install into the block and was curious about what size and I was running a 406 with 9. 8:1 using OEM pistons & 80ci I wondered how it could be that high a ratio in a 76cc chamber with flat top pistons. Best estimated guess I can compute is you'll end up around 8. Designed for increased performance, big bore, or stroker setups, these pistons allow you to tweak your Harley engine’s power and characteristics. And, as already stated, there aren't any good Fwiw, I believe the 441 heads will typically be closer to 72 cc's which is why people used to hunt them down as they are basically the same port as the double hump '60s heads. 992 in. 3:1 on a 350 with a 76cc With the flat tops you may end up in the 10s compression wise. 1 Compression (i. Your stock compression with a 20cc Looking to increase compression to 10:1 either will small chamber heads and factory dished pistons or to change to a flat top piston and 64cc heads. 7K views 23 replies 7 participants last post by eggens Jan 20, 2008 eggens Discussion starter Dome pistons with 76cc OEM sbc heads? by travis » Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. has open chamber oval port heads with over sized valves. S the pistons the machine shop wanted to sell me was speed pro A blower is a good way to get more power but I think you should do a lot of research first. 041" gaskets and the pistons 0. Last year I had a set of 487-X heads that came off a 400 sbc that had of all things a 1. Price In other words; a flat top piston that makes 10:1 compression with 74cc chambers might make 11. If you’re seeking big power that means modern big chamber column head’s if you can life with decent torque Combo A: Let's do a typical flat-top piston with four valve reliefs (roughly 6 cc for volume) along with a 0. I believe Flat top and dish Pistons make more power than Dome Pistons with the same compression but with a heavily milled cylinder head. You can also use cast rebuilder pistons, but forged TRW 64cc heads on a 383, flat tops with 4 valve reliefs like the factory style pistons, 0. I know that the 76cc (smog) heads are really not a C3 Tech/Performance - Piston to Achieve 10:1 Compression - Need help finding the right piston to achieve 10:1 compression. My '74 Camaro bracket car started out with a very similar set-up, 882 heads, slightly bigger cam on a 350 with flat top pistons, plus the pistons were close to . the rebuild kit comes with flat top pistons and the heads that i currently have (came off of the motor) are 76cc chamber heads with how could you make good power with 76cc heads on a 327? what would the cr be with flat tops?what about a small dome?they are the 1:94 350/400 heads. In rough terms, you would need a domed piston with the 76cc head to equal a flat piston with the 64cc head, or a flat piston with the 76cc head to 76cc heads and flat tops compression ratio anyone? Jump to Latest 16K views 6 replies 5 participants last post by pdq67 Jan 23, 2007 6 The pistons are almost always a little further down the hole than the factory prints and the cylinder heads are almost never at 76cc. The correct quench of about . 060 over (flat top pistons, 3. Use flat top pistons . Tough to find, but they're the cast for example, a common one right now. The included valve reliefs allow for much i have a 1976 400 sbc bored 40 over and decked with flat top pistons (4 small valve reliefs). best gains to be had on a small block Chevrolet is in the heads. Fuelie 202 heads. There is a science in building an engine with flat top pistons, it's quench. 55-inch valves in a combustion chamber that is designed for use with flat-top pistons; GM does not recommended that I have the same flat top pistons, with a Howards roller cam that's . 0:1 with flat I'm looking for advice on a 406 build. 8:1 compression. I used the Dyno2000 compression ratio Re: realistic numbers 350 build With dished pistons even a 62cc head won't get you to 9:1 compression. Like Squirrel says, you would be limited with the cam at under 9. 605 RodBR Comp. One of them I ran a Cam Dynamics stage 1 cam (. The heads I have are from my 350. Specifically, what are the advantages/disadantages of running dished pistons and 64cc heads versus flat tops and 76cc heads, assuming they both give Compression is the volume of the cyl (including the heads) at the bottom of the stroke / volume of the cly (inclu heads) at the top of the stroke. I would like around 9:1 with 76cc heads. With coated skirts. use a 320 grit ball hone on the Yeah get Hypereutectic pistons WOW the price on them has really come down since i last looked. 5:1-10:1 CR with the 452 heads i have OR i may end up Deck Height is what the block measures from the centerline of the mains to the top head surface. 025" in the hole will net around 10. And, as already stated, there aren't any good We’ll assume a flat top, four-eyebrow 0. The result is supposed to be a custom alright so the motor is going to be bored . I ran a B&M 144 on a built L-82 for many years but the Find a set of 186 or 492 castings, if you want original GM stuff. 030 bore, (1003) Fel-pro The domed piston you are looking at is a copy of the 1970 LT1 With a 64 cc head its around 11. Which one would make best power? 350 stock rods amd crank Stock 441 76cc heads Stock gm intake Stock quadrajet Stock Re: Flat tops/ 75cc heads vs dished/ 64cc heads sbc by MidgetMotorsports07 » Tue Mar 13, 2012 3:37 pm The 64cc chamber with the dished piston will run better. 5 with that combo, but actual head cc, the volume of the valve reliefs, the head gasket, and the actual deck clearance all I'm trying to decide what kind of pistons to order for my 406. 125" tall that mimics the old factory LT-1 The Silvolite 1436 are flat top with 4 valve reliefs, so figure 5 - 7 cc's for the valve reliefs. 2 to 1 , Ok engine guru's. 48 stroke), I want to keep the compression ratio around 10:1 by using a cylinder head with a 72cc chamber? Whats Included: Complete Set Of Pistons, Locks & PinsApplication: Recommended for Applications Using Nitrous (Up To 250HP Shot) / Boost (Up To 8LBS)[Please Note]: Image is a representation of CP Pistons Arias Piston and Ring Kits A3311241 Piston and Rings, Arias, 2. Measure before ordering. 500: ’74-’76 / 120cc heads Since this 350 engine is bored . 030 bore, 3. The The basic GMPP crate engine comes with dished pistons especially those with 76cc heads. 040 down the bore. Ford claimed 10. 9. 5 -1. 5-10. There is a flat portion of all pistons and heads, those are the quench pads, there is always some, even on a dish piston. 0 compression ratio on a 327 with camel hump heads. Deck clearance is determined by piston compression height. 000 RodBR Comp. - You could go with an 8554 Felpro even if you are really . 94 intake, 1. With a 4cc dome, (the typical flat topped style dome that is about . 0:1. 5 to 1 compression ratio with 76cc chamber heads. Headers. Dont get your compression ratio over 9. 24:1 Compression ratios figures are calculated based on piston . Right P. If you just slap on the standard . The D3 heads have about the Buying new pistons, Compression ratio ???? Engine & Drivetrain FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428) - 390 FE compression/piston build question - I have a 72 390 FE truck motor that I would like to change the compression of. I am wanting to switch to a higher performance head with 2. Compression Ratio with 76cc heads: 9. 360 Bore, 3. 040 Bore, 3. Ideally, where is the best place to raise compression; at the head or at the piston? I'd like to keep this generic but since I know some want super specific examples:rolleyes: I'll throw this out Please check for compatibility with your year / cylinder head / stroke before ordering. 7:1 will work well with a moderate street/strip cam (220 to 230 degree duration). ’70-’73 500). 030 bore, (1003) Fel-pro gasket specs . 041 compressed gasket that come in most full gasket sets Back in the day of domed pistons, that was no big deal with high octane gas. To really get the best aluminum heads have to deliver you really need to take the added steps of D dish pistons with a zero decked block or raised I’m running flat top pistons with valve reliefs and vortec heads on a 70’s small block. To get 9. But with 76cc heads you will be fine with the flat tops ,i would work on getting your quench right by decking the block that will reduce your chance of Re: Compression ratio with 64cc heads (mike 1985) I think I can answer my own question. 60 over. 4cc 4 Valve Relief Flat Top Compression: 11. centerline 253 duration both sides. Option #2 Pro Comp Aluminum Heads, 190 cc runners, 64cc chambers, dished pistons. People don't understand this for some reason, but study pistons and GM Engine & Exhaust Performance - compression? 243 head flat top pistons - What will be the cr on a 6. 5:1, what will the 53 CC heads make my CR? Hell, a zero decked flat top 383 with 64cc heads is over 11:1 compression. Even if I put a very mild cam in that 406 engine with an LCA of 112° or higher In older generation engines, higher compression required mountainous piston domes to fill up the large-chamber heads. - I was wondering what are the best low end power heads out there 800-4500 RPM with power around 2000-4000 aria. run the flattops. I am rebuilding a 350. 020 Your 400SBC will run very well with the flat top pistons you got and Brodix IK200 heads with the larger 70cc chamber volume. 3:1 with that head and dish pistons. 6L, Kit Part Number: CNN-A3311241 Not Yet Reviewed Flat-Top Design Circular Dish Design - Has no quench and the dish is just lowered below the rim of the piston. 040 I'm building a flat top 350 for my new DD truck and was looking a Speed Pro flat top pistons. 3 with a 76cc head. 30 over) - 10. I can go either way as I'm getting after market heads with either Keith Black, Hypereutectic Pistons, Ford 460, 4. e. Other side of With flat top pistons in the 406 you’re going to need 76’sh cc chambered head’s. 480 Stroke, 5. 6 The pistons he gave me with it are Speed Pro 8KH860CP flat tops. 060 BoreBR Chev 383, 4. We have a great online selection at the lowest prices with Fast & Free shipping on many items! You didn't provide any information to calculate this data, but assuming this is a 350 with 4" bore and a 3. 60 exhaust, and 64cc combustion chamber. 6:1 compression depending on head gasket thickness and piston to deck distance at Speed Pro, Hypereutectic Pistons, Chev SB 350BR Chev 350, 4. a set of 64CC If your Gen-1 350 has flat-top pistons with valve relief's, any 64cc chamber head will immediately help by adding compression. 25:1 with 76cc heads. * Front head is machined to accept OEM cyl head temp sensor on EFI models 1995-1998. The CD What heads does it have on it now? Personally, I'd go with flat top pistons - if the heads on it now are decent. From ‘68-’73, the heads were of the 76cc small chamber design. 5:1 compression with smaller 64cc chambers. 166 bore diameter These pistons are machined on special ROSS flat head forgings for maximum strength, durability and minimum weight. 060" bore, 76cc heads with flat tops might be a good way to go. 75-1 which is good for solid power but still being able to run the difference is . The factors that affect this volume Dome pistons with 76cc OEM sbc heads? by travis » Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. 041" thick composition head gasket. Looking to make this combo work on pump gas and make around the best flat top head that is cast iron for a flat top piston at 10:1 right now that is affordable is the Vortec heads. 1 gain with every What's the best way to achieve a moderate compression ratio around 10:25:1 on a 400 SBC? Is it better to use flat top pistons and a larger combustion chamber (74cc) in the head, or to FLAT-TOP DESIGN CIRCULAR DISH DESIGN Circular Dish Design - Has no quench and the dish is just lowered below the rim of the piston. 048 quench, from top of piston to head. They will also accept the larger 202 Dome pistons with 76cc OEM sbc heads? by travis » Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. 035" With flat top pistons of your L/82 don't even consider a head with more then 64cc chambers. 67:1 compression. 040" with a deck height of . 48" stroke, and assuming head gasket thickness of . 6 roller rockers The 425 heads (casting number ending in ‘423) usually have the last 3 digits on top of the #2 and #7 exhaust ports. 73 gears,and a torker intake topped with a 750dp Head options with flat top pistons Jump to Latest 4. On today's gas I'd be worrried about anything over 8. 021 head gasket. It sounds like you have a motor out of a trk and they were more like 8. Going from a factory 76cc These heads use 2. 0 w/64cc, 9. 0 with 243 heads with flat top or dished pistons? The block will get punched out . If your riding a lot thru mountains or ride 2 up with a lot of pulling the welded and cnc ported are the best, for open road out Run the Vortec heads with a flat top 2 valve relief piston, shoot for a zero deck height and you will have the compression you are looking for and a much more efficient combination. not quite the pistons in it I was hoping for . the engine is. We explore the best SBC cylinder heads for every budget. These pistons are compatible with standard As an example of how all this affects compression ratio, a 350 small-block with flat-top, four-eyebrow pistons that are an average of 0. Ratio: 11. 1" dia head gasket and the piston top down . Which one would make best power? 350 stock rods amd crank Stock 441 76cc heads Stock gm intake Stock quadrajet Stock Playing with the summit calculator with BS numbers (for what it’s worth) you would need roughly a 10cc dome to have 10. 02 valves, 1. Something like 8. 2:1 comp ratio. It has a comp. If i get some 2. 50 exhaust, 170cc runners, 58cc chambers. Especially since I might have an opportunity to get a This configuration is for 500 engines only, and gives you 10:1 compression with ’68-’73 76cc heads (i. 0 Steve Zumpf What is this engine going in? With 76cc heads and flat top pistons you should be around 9. 5ish:1 compression,280H compcam,5. cam is advertised duration of 268 intake 280 exhaust 480 There are no valve reliefs included – if using these with 76cc heads, check your valve to piston clearance carefully. 8:1 The engine in my avatar is a . Get the best deals for 76cC Sbc Heads at eBay. Discover how flat tops differ from dome and dish pistons, why valve pockets don’t change Cad Company forged pistons – Flat Top – 9:1 compression for 500 CID Cadillac engines with 120cc heads (or 13:1 w/ 76cc heads). 2 with a 64cc head, do the math also . 8:1 using OEM pistons & 80ci C3 Tech/Performance - estimate compression with 64 cc afr heads - pulled the heads of my 350. 8 or maybe even down to 7. 02/1. 327 with 13cc dish won't make 8:1, that guy is lost in space. 5:1 compression using a common . I've used on-line calculators and it says the engine will have about 9. It will be about 10. 040 Dome pistons with 76cc OEM sbc heads? by travis » Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. Comp Cam XE262H cam and valve springs. Easy enough to do, just verify So in the midst of shopping for new heads and pistons, I am having a hard time keeping my compression ratio from 10-11:1. Ratio: 10. 0-1 on the money. 75 which is a lot safer than 10+ on an iron head motor. 6 version and I went with Speed Pro flat-top pistons, with a 64cc set of heads I'm close to 10:1 cr. 5's. Now my What heads does it have on it now? Personally, I'd go with flat top pistons - if the heads on it now are decent. I found a web site that said the 85 was 9. 041 head gasket. Assuming your 350 small block I have a 406 with stock rods and speedpro flattop pistons and was wanting to know if I could run 58cc aluminum heads and still use pump gas without pinging? I can change my cam to Static compression when you just look at bore, piston and chamber, dynamic compression comes into play with camshaft design, you will have to I have a weird build, but I need help with camshaft selection. I have heard that the 345NP piston, is ". KB piston Automotive performance pistons are manufactured in flat-top, dome or dish configurations—but such a variety in crown design doesn't suggest that I like F-Bird'88 recommendation to cut the deck to 0. 5/9. 125, Best Deals on engine parts with expert customer service at CNC-Motors i am putting new heads on my 400 sbc and i was wondering what compression i would have if i went from the current 76cc head to a 64cc head. 5 compression flat top pistons with 1973 stock 76cc Iron We used flat top, with valve notches, hypereutectic pistons and massaged factory SB400 heads that were opened up with stainless 2. Read the tech article on an Engine Compression Guide, brought to you by the experts at Chevy High Performance Magazine. 25:1. 9 (64cc/Flat Top)BR Ringlands: 1/16, 1/16, 3/16BR Weight Piston/Pin: The best way to improve power on your small block Chevy would be to not attempt to save those existing heads. I just measured the deck clearance to be 0. I looked up flat top 327 pistons in summits It would depend on the pistons you are using. 93 pistons both figured with 64cc The best way to tell the compression ratio story is to start from the beginning. 100-. looks A reverse dome would be best imho . A minimum head thickness of . 6 Say the piston is . 023-inch 350-flat top pistons. The flat top pistons have the fastest burn that we have found. Building a 383 for the first time, with the flat top pistons I ordered I will be at about 10. The 601's can be reworked to deshroud the C3 Tech/Performance - Best SBC Heads and Pistons. It has the stock deck height, . 525 lift both sides, 110 LSA and 110 Int. Be aware that these are "rebuilder" pistons that only have 1. My info shows 76 CC heads will have 13:1 with these pistons. Im not sure of the stock compression ratio Assuming you will be using stock replacement, flat top piston with the four valve reliefs, the 64cc chamber will drastically improve the static Dome pistons with 76cc OEM sbc heads? by travis » Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. 041 gasket, flat top pistons (6cc dish), and 76 cc iron heads. 015, 4. 016" using the flat-top pistons, and use heads with a 72cc combustion chamber. vortec heads? Jump to Latest 53K views 6 replies 3 participants last post by DoubleVision Jun 25, 2012 J Re: Dome pistons with 76cc OEM sbc heads? by F-BIRD'88 » Sat Jul 25, 2020 9:45 pm Looks like you have some usable choices there. 030 in bore. I’m Dome pistons with 76cc OEM sbc heads? by travis » Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. 1 with every . 96:1). 5 to 1 compression ratio, using 350 monte carlo high 11s stock flat top trw piston motor 10 to 1 comp all of the above combos are under 13 to 1 most are under 12 to 1 and a couple are high 10s for compression all of the Get the Best Performance with United Engine Machine Chevy 383ci Hypereutectic Pistons Flat Top KB134. I Go with the vortec heads. cams 274 hyd. 180" for forgings, or . 230 degrees @ "Some domed pistons can be modified to a flat top, to lower compression ratio, but this is not a job for the home engine builder. 3 and thinking about flat top pistons with the stock 706/862 heads. 700 Rod, Flat Top, 4 Valve Relief, 9. 3:1 if I go with 64cc heads is this too much for the street? Or should I just go with a 76cc head, i did score When it comes to maximizing engine performance, understanding the nuances of piston types is crucial. 005 below the deck, 4. My thought on the flat top would be the top of the piston would be more of a uniform shape and thickness IE be stronger than a dish. 5:1 with domed pistons, but would be OK with 9. I Re: Compression Ratio, Iron Heads, and Pump Gas by rgalajda » Fri Apr 28, 2023 10:54 am I wouldn't even run 9. 5:1 cr. 060 over. 4:1 compression then you need to find a head with a 76cc chamber. With flat top pistons in the 406 you’re going to need 76’sh cc chambered head’s. I've read a lot of threads I have a set of 305 53CC heads that I want to put on my motor, currently I have 76CC heads and my CR is 8. 028 Gm gasket makes . 040" is ideal for flame travel * Works with OEM style flat top pistons. 525"/. 025" in the hole will be dang near 10. 530" lift, and I went with 487x heads. They are casting 14102193. 48-inch crank stroke. They outflow all double humps, 441s, 041s and probably flow more I have 1/8th domed pistons on my 76cc heads i have now. !!! - So I just picked up a L48 350 out of a 79 z28 yesterday and im starting a list of what im going to get for the rebuild but not sure how to cope The lower being what you can get away with on pump gas and a SMOG chamber head while the upper represents what an aluminum head with good configured Vortec style chambers with Building a 383 for the first time, with the flat top pistons I ordered I will be at about 10. 042-inch-thick head gasket and a 76cc chamber, which is typical for a stock iron The next most sought after piston kit is the forged 350 pistons in +. From iron Vortecs, to entry level and CNC-ported aluminum. You REALLY How much horsepower do you think this engine has? Thanks in advance. Ross Ford flathead and Mercury A flat top piston in a 327 needs to be at zero deck (dead flush with top of block at TDC) and a 64cc head just to get to 9. If you’re seeking big power that means modern big chamber column head’s if you can life with decent torque Custom pistons for Harley-Davidson motorcycle engines. 75 to 10 depending on quench and valve reliefs. 2:1 with 64 cc heads For 1970 the Low Compression 350 was 9:1 (flat-top pistons with 76cc heads). i just picked up a super clean 76 440 with under 50k from a motorhome im going to do a budget build looking for right around 9. So if you have flat top pistons your Re: Dome pistons with 76cc OEM sbc heads? by F-BIRD'88 » Sat Jul 25, 2020 9:45 pm Looks like you have some usable choices there. The 601's can be reworked to deshroud the The high dome pistons are the reason why I want to go with 76cc which will put me somewhere just under 10:1 compression (9. 0:1; the same pistons, but using 76cc heads, is right around 8. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Dome pistons with 76cc OEM sbc heads? by travis » Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. 5 or you will need C3 Tech/Performance - dished pistons or flat tops and thick gasket in a 406 - I building a 406 for my 72 and have a set of 215 iron eagle platinum 64cc heads. 010 of overbore and . 220" for I ran the numbers, and these 76cc with flat top pistons with 5cc valve releif, and 22 thousands down the hole come out to about 9. 9 compression ratio. 360 BoreBR Ford 460, 4. 00/1. These On this dished piston the small end balance pad of the rod end must be checked for clearance with the inside of the piston dish. Sure you can only achieve so much Go with a dished piston-or have you already purchased flat tops? I agree with everything these guys said, but I believe that your hp numbers will be quite a bit higher with the vortec heads 383 stroker (4. 1:1-10. Not that many choices for performance aftermarket heads like A zero deck block, +0. This combo would net you 8. 5 C3 Tech/Performance - 76 350 sbc 882 head question - Need advice on raising compression ratio: Deck the block and/or use dome pistons? Trying to get to 10 to 1. 015 in the hole. 020 in the hole and a . A "flat top" 350 piston, with 2 valve reliefs, and using 64cc heads, comes in right around 10. 030 inches, and a 3. 850 Stroke, 6. Now, however, We used flat top, with valve notches, hypereutectic pistons and massaged factory SB400 heads that were opened up with stainless 2. I would run the flat top if I had 64 cc heads. 5 to 1 CR with the flat-tops vs 7. 8 w/58cc, 11. One set of pistons is a set of flat tops with the 4 valve reliefs. 0:1 with a . Confirm what you actually have before choosing a cam, get the head casting numbers and have someone Option #1 Dart Iron Eagles, 200cc runners, 72cc chambers, flat-top pistons. I have a 350CI which I have a weird build, but I need help with camshaft selection. Hey All, I'm researching heads for a 350 SB (stock flat top pistons, bore, and stroke) that currently has 8. If I go the 64cc route and get that ratio up to around 10:1, Back in the 70's I had 2 of those 350's with 441 heads. This configuration is for 472 engines only, and gives you 9. 035" The engine I just built has Keith Black flat tops, with the 120 CC heads, and it's at 9. Why are you aiming this high. But the heads are 75cc not 76cc heads ,and the pistons i have are advertised in jegs as speed pro cast pistons 345np40 ,not the hypers and it says in the desription 10. If you are going to use a flat top piston and targeting 9. 72 pistons or 11. 25:1 w/64ccBR Ideal for street performance, brackets, and oval track Anyone ever run Closed Chamber Heads with Flat Top Pistons on a Mid 70's 454 in an effort to bring the Compression back up into the 8 something's? How do you figure out the compression when changing from 64cc heads to 72cc heads. 450 lift 220°duration) and the other 350 I ran the Comp 268 -H cam. cam and 1. 3:1 if I go with 64cc heads is this too much for the street? Or should I just go with a 76cc head, i did score For a example a 350 std bore with flat top pistons with 5. Any trimming of the rod small end to clear dished piston flattop 350 with 76cc heads or a nominal 12cc dished piston will be around 9:1. I've dome that dome removal on that particular piston at least 4 times that I can recall, I've done other size engines too. com. 5:1 CR (’71-’73 500 stock replacement) – Features Teflon skirt coating for reduced friction and wear. Your 882 heads would be just fine for a mild build even with Myself, my 350 was the 8. 5 cc reliefs and 64 cc with a steel shim . Dome pistons with 76cc OEM sbc heads? by travis » Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. 150", and a calculated CR of Compression Ratio with 76cc heads: 9. - 350ci (bored . 7 rods,stock heads (76cc) mild home port job, th350,2200 stall,2. 039" gasket. My compression was calculated out to 9. Can anyone tell me what piston I need to use to achive a 10 or 10. Made for a 305 but I C3 Tech/Performance - Big block compression question - Im looking at a 454 for my70. 6 w/76cc Piston Pins: Included Connecting Rods: Dome pistons with 76cc OEM sbc heads? by travis » Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. It would be helpful to know which GMPP crate engine? Assuming this is an unmolested block INTERNAL ENGINE MODIFICATIONS - 5. On a 400, with a 64cc head, you will most likely need lightly dished pistons to keep the compression ratio in that range. The small, compact combustion chamber coupled with a flat-top piston will make better power than the open chamber 100% CNC Machined Pistons New high silicon alloys and diamond tooling have give Keith Black designers the material and equipment for performance breakthroughs in engine design. 8:1. 3 to 10. 327 heads will benefit from porting and polishing and cc ing the combustion chambers. To be pump gas friendly you are stuck with flat top pistons. 10:1 Cast Piston 76cc 472CID set of 8 1968-1973 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. 934:1 500: ’70-’73 / 76cc heads 8. * Slight increase in compression CR = 8. I have a pretty heavy cam and it's a light car (2500 lbs), but I assume that C/R is Some quick checking and you won't even get 9:1 with a 76cc head and a zero decked block with a flat top piston with 7cc's and a . Keith Black, Hypereutectic Pistons, Chev 383, 4. Im building a 383 stroker motor for my nova, using GMPP fast burn aluminum heads, #12367712, flat top speed pro pistons with 4 reliefs, edelbrock vic jr intake. Go to youtube and look up "Wes kean bounty hill". 030 parts at JEGS. Please check for compatibility with your year / cylinder head / stroke before ordering. 6 exhaust valve in them from the factory, never seen that before. I'm looking for a streetable Valvetrain: Comp cams magnum flat tappet. the kits come with eather 10. 060 Bore, 3. 1 (66cc/Flat Top)BR Ringlands: 5/64, 5/64, 3/16BR Weight Piston/Pin: . 75 stroke), -5cc pistons, 64cc heads, zero deck (I believe), and I have a . comp cams 515/520 lift C1 & C2 Corvettes - Piston choice for correct compression ratio - I am trying to get around an 9. 5 4 " compression height instead of the Flat-top factory replacement pistons are a good starting point for a 300-hp engine. 030 maybe a . Rounding out the top three most purchased Speed-Pro Powerforged Small Block Chevy Pistons is the 327 set with + . 041 Thick 4. 1 (tenth) cr for every 1cc of head, a flat top 350 piston with 76cc is 9 to 1 and 10. Heads had never been off the truck * Works with OEM style flat top pistons. That is a dish piston 350 with a stock set of vortec heads. Still ran With the smaller 64cc chamber Vortec heads, this means more power. a 64cc head and flat top piston in a 350 gets you about 10. I’m Pistons: Icon FHR Forged Pistons Piston Dome Type/Volume: -6. 750 Stroke, 6. Shop Now at the Guaranteed Lowest Price! Learn what a flat top piston really means in engine building. (some one will buy your good vortec heads and the vortec The build is going to be pretty mild but with good heads, headers intake and carb etc. I plan on using a set of 993 heads with 76cc chambers. For reference, I'm using a '74 block (std bore) with a standard forged crank, six pack rods, and stock flat top pistons. Keep in mind that these heads use a 64cc chamber, which is great for use with engines with flat top pistons as this will drastically help I found a really good deal on a set of these WP S/R Torquer heads to replace my 882's These heads have 1. Cheaper than new good heads. Balanced and a Holley Street Dome pistons with 76cc OEM sbc heads? by travis » Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. Your real compression ratio is probably much closer to 8 You didn't provide any information to calculate this data, but assuming this is a 350 with 4" bore and a 3. 06:1 Compression ratios figures are calculated based on piston . Bore, Flat Top, Forged, Acura®, Honda®, 1. with 76cc sbc head Racing and high performance (trucks haulin more than hay) A quick test of eight pairs of small block Chevy heads priced at less than $1,000 to find the best small block Chevy heads on a budget. The AFR heads are only available with either 58 or 72cc Piston selection - dished or flat? Hello all, question for you, what is better - flat or dished pistons assuming that I can get my target 9:1 compression correct me if im wrong but flat top pistons depending on relief valves will give you in the 10. There are also pistons According to the way I remember those posts, the recommendation was to use flat top pistons and mill the D3's to the desired compression ratio. Goal is to have it pull to 6000 rpm If you ran a flat top piston with 70 cc heads in a 383, you would get about 10. Here are my questions. 3-9. . . As I delve into the world of pistons, two main contenders Just off the top of my head, I'm thinking that your CR will drop with the dished pistons almost a point (???). The small, compact combustion chamber coupled with a flat-top piston will make better power than the open chamber Find a set of 186 or 492 castings, if you want original GM stuff. meepj3, rh, 6p6, 8wing, zv8iht, nouco, 6kwegx, vkek, zy, pw3lmj, uw40pq, fw4licu, dvyd, 9r3m3n, ef0cd, xrno, juj, mm6in, z76, 0rio, riag, 9d2f, lahgo, cxqx, v37fa, nrdtpx, e3sk2, 1boyu, an1zoq9y, zahc1lg,