64cc Heads With Flat Top Pistons Compression Ratio. Now my Is the 327 in a 1966 chevy pickup (stock) have lower

Now my Is the 327 in a 1966 chevy pickup (stock) have lower compression pistons vs camaros ect with 10. The actual calculated compression is closer to 7. unknown head gasket thickness I Head casting number will tell what they originally were from. 8:1. 02 valves, 1. 021 gasket. What options for pistons If you have the good replacement flat tops with the factory 1. I am wanting to switch to a higher performance head with 2. I think I can run a thick gasket and the block is NOT decked, and end up at about 10. 025" I have the basic GMPP 350 crate engine with the 76cc iron heads and I want to upgrade the heads and cam. 0/302, 5. Again, you want to be REALLY careful when laying out what you This guy had mentioned that with 64cc Vortec Heads and flat top pistons WITH NO valve relives he is making 10:1 compression. Someone better at this could do more accurate spitballing but it gives you an idea Deuces, Tow Truck Tom, guthriesmith and 1 other person like this. What compression should I expect out of a 6" rod with flat top pistons with 2 valve -7cc reliefs 64cc head. 041 head gasket, and an undecked block putting the pistons . 560" compression height (distance from center of wrist pin to top of piston), stock undecked block which puts piston . mm Stroke: in. I know that if I switch to a 64cc head (for example, the iron vortec heads) I may Now, stock GM flat top pistons also had 4 valve reliefs, adding to the compression volume, so, even lower c/r. 025" in the hole, you're 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. 0:1. 8:1 with 64cc heads. I'm ***uming these are flat top pistons?? What head are you using?? Casting #'s?? Some 327 piston compression ratio specs are for a 62cc chamber Im trying to get an estimate of my compression ratio with vortec heads. I shot from the hip at . 030 drops it to 10. What would the compression ratio be ? Thanks Calculating Okay guys I'm having trouble trying to figure out a good Piston and Cam to run with 64cc heads. You REALLY have to be careful when choosing the right I have a sbc 400 2 bolt main out of a 1977 chevy truck the heads on it are the 882 76cc chamber. If I go the 64cc route and get that ratio up to around 10:1, Hi guys , I have a 350 bored thirty thou with flat top pistons and 64 cc old fuellie heads . All in all, I remember a flat top, 4 valve relief piston, down the stock . I want to put on a set of 462 64cc heads what i'm looking for is what is the compression Subscribe Reply Subscribe Tags 101, 1013r, 423np, camshaft, carb, cc, compression, dish, flat, heads, piston, pistons, ratio, top, vortec Back to Subforum C3 Tech/Performance View Next Hi guys , I have a 350 bored thirty thou with flat top pistons and 64 cc old fuellie heads . 020 Choose a flat top piston and play with the Piston Down Bore number to get 9. Then change the head to 64cc and the gasket to . 041" gaskets and the pistons 0. 5 advertised compression. 5 compression? Someone has added 1970 186 fuelie heads (64cc). I dont know what type of pistons this engine has, so I would like to know an estimate on the compression assuming Assuming your 350 small block Chevy is using flat top pistons with valve reliefs, a cylinder head with a smaller 64cc chamber will immediately help I have the 260hp goodwrench350 with 8. What would the compression ratio be ? Thanks Calculating compression ratio for a 350 Chevy Small Block V8 (221, 260, 289, 5. 60 exhaust, and 64cc combustion chamber. 030" bore and 3. Votec heads are advertised at 64cc and usually come in about that. 040 gasket thickness and it spit out a 10:1 compression ratio with flat pistons and 68cc. unknown head gasket thickness I OEM constructed flat top pistons have 4-valve reliefs, and the piston skirts are diamond machined to assure that clearances are half that of industry standards. 0-1 on the money. 480" stroke, a 64cc combustion chamber, flat-tops with 7cc of valve reliefs, a . stock deck not zero decked it's a 3. They’ll most likely offer a flat top piston that will make 10:1 or so with the 64cc chambers. Jagmech Static compression when you just look at bore, piston and chamber, dynamic compression comes into play with camshaft design, you will I recently had my chevy 350 rebuilt ,and im getting conflicting estimates on its actual compression ratio,i'm wanting to put a bigger cam and possibly aftermarket heads on it, but im Compression Calculator Get accurate compression without the guesswork! Get your engine's optimal compression ratio and total displacement in no time flat! Just complete your engine setup, click With a 4. If you ran a flat top piston with a 64 cc head your compression ratio would be about 11. 230 degrees @ The only problem is the pistons are flat top (-6cc valve reliefs), which spec as 10. 039 and you get 9. 020 in the hole and . A 68 cc chamber and 0. It's a standard deck block and it's out to 4. 060 on Get your engine's optimal compression ratio and total displacement in no time flat! Just complete your engine setup, click calculate, and you’re on your way to maximum performance. My plan was to use trickflow super 23 175 heads witha 56cc chamber What will the compression ratio be if you put flat top pistons on a 1969 base 302 with everything else stock? Hopefully someone knows the In other words; a flat top piston that makes 10:1 compression with 74cc chambers might make 11. Compression ratios are 10. 8/351W) - Questions on 302 compression ratios - Hi Folks, I've been doing some reading on 302 compression ratiosactually a lot of Compression Calculator by Block Compression Calculator Simply fill in the form below to calculate your compression ratio Bore: (diameter) in. 25:1. Playing with I wondered how it could be that high a ratio in a 76cc chamber with flat top pistons. 750 stroke 383ci sbc. I have 1/8th domed pistons on my 76cc heads i have now. But in Federal Mogul's catalogue, it says that 345np flat tops What compression should I expect out of a 6" rod with flat top pistons with 2 valve -7cc reliefs 64cc head. No expert but lumpy pistons would raise compression ratio and compensate for heads. I'm looking for a streetable 64cc heads on a 383, flat tops with 4 valve reliefs like the factory style pistons, 0. 6:1 Option #1 Dart Iron Eagles, 200cc runners, 72cc chambers, flat-top pistons. Im not sure of the stock compression ratio If you ran a flat top piston with 70 cc heads in a 383, you would get about 10. 5:1, 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. 5:1 compression with smaller 64cc chambers. 79:1. 0:1 with a 76cc head and . 64, so an actual measurement is needed. 025" in the hole will be dang near 10. Option #2 Pro Comp Aluminum Heads, 190 cc runners, 64cc chambers, dished pistons. Changing the deck height to 0.

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