If you're interested, I have a pump gas 8500 rpm 530hp stroker 302(332") that I'm considering selling. It has 4500 street driven miles on it. $10.5k invested. You would need either a high stall torque converter or a manual transmission with a race clutch and lots of spare driveshaft u-joints.
Those pistons will add about 8cc to the size of the combustion chamber so if your reasoning for a thinner gasket was to keep compression up you are still there.
I wouldn't go with a thinner gasket. If you have the heads you talked about, (with the thick decks), I would have them milled instead. I don't mind going to a thicker gasket when necessary, but I think a thinner one is asking for trouble.
By milling the heads and staying with a normal compressed thickness gasket, (around .040), you don't limit your choice of gaskets as much either. The thinner gaskets are usually more expensive for the same level of gasket, and the price difference would help with the cost of the milling.
The amount of CR ratio change that you can get from a gasket change is pretty small, whereas with those heads you can get a drastic change by milling.
I just went back over this thread and I now see what you were thinking, so easy answer is -don't worry about it.
im looking at the 180cc heads 64cc bare cast iron. I havent got the heads yet. Also what does the extra thick deck faces mean. and im kinda confused on what intake manifold to buy i think the choices are between edelbrock performer rpm, edelbrock performer rpm airgap or the weiand stealth but im open to any sugestion. i will be buying the speedpro pistons u showed me doug either this friday or next wednesday
im looking at the 180cc heads 64cc bare cast iron. I havent got the heads yet. Also what does the extra thick deck faces mean. and im kinda confused on what intake manifold to buy i think the choices are between edelbrock performer rpm, edelbrock performer rpm airgap or the weiand stealth but im open to any sugestion. i will be buying the speedpro pistons u showed me doug either this friday or next wednesday
Extra thick deck faces- see post#14.
You won't have enough compression if you buy those heads with a flat-top piston. You need to get the 53cc version. I found them all together somewhere and all 4 were all the same price. I'll see if I can find that back and link it to you in an email. Since there was no price difference, I'd also go for the aluminum ones. What the heck I found it, so:SB Ford 302-351W, 5.0 RHS 180cc aluminum Head, 58cc:eBay Motors (item 200318609635 end time Nov-04-09 19:36:34 PST). They also have the cast irons for the same $.
Not much difference in the performer and air-gap except the air holes keep the incoming charge cooler. Any of them would work, but I'd go with the Air-Gap.
I've been concentrating more on 351W's than 302's, so if anyone disagrees with the 58cc suggestion, (in case there's something I'm missing) shout out.
Hey, wait a minute. I'm building a 351W.... Go ahead and get the 64cc's Deve, and when you're not happy with them, I'll take 'em off your hands......
im only 19 and this is my senior year at school. So my parents will drive me truck every now and then and aluminum will warp to easy. My mom just drives she wouldnt notice if it was overheating. Thats why its being rebuilt right now i left for a week and she had ran it out of oil, the dipstick had poped out. Plus the price is cheaper for cast iron. next thing how high of compression can u run on pump gas i did a compression calculator it said i will have 10.7:1 will that be to high
I'm pretty sure you are plugging in something wrong. That would be about the CR I'd have with my .060 over 3.85" stroker with 64cc heads. You should be close to 9.5:1 with the 53cc heads and an anemic 8.5 or so with the 64cc's. What year is your block?
The tables listed with the pistons are pretty close usually. You are probably putting in something as a + that should be a - (or vise versa, each CR calculator is a little different).
I think that you'll be O.K. at 9.5:1 with the cam you are going to use. With aluminum heads, you can go to 10:1 easy. If you run the aluminum's out of water they will warp and have to be milled. If you run the cast irons out they may crack. Best thing is not to run dry. BTW-I meant antifreeze, never run water unless you are on a dragstrip.
Just realized I was running the numbers on 53cc not 58cc, so you would be closer to 9:1.
tell me if im putting the right info in 4.030 bore, 3inch strok,e 8cyl, 64cc head, piston 8+ cc, gasket 0.040 Engine Size and Compression Calculator 1989 block
The pistons would be -8cc for that calculator. Oh and it asks for gasket thickness compensated for with piston height, so use .025 (that'd be close). And I just realized CNC must have their aluminum price on the cast irons I wasn't paying close enough attention. I'm sure they'll sort it out pretty quickly, unless they sell a bunch at that price!
OOps- The adjusted gasket should be .055, I went the wrong way.
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