Advanced Engineering Tech - cr help!!! .200"x4.04 equals how many cc's?

ok, im doin a rebuild and need help on figuring my cr! i have a 4.04 bore, 58cc heads, 3.75 stroke (385 ci) and flat top pistons, no valve release, and my piston at tdc is .200 in the hole! so if i could figure out how many cc's .200" with a 4.04 bore is i could use that figure as my valve relief and figure my cr with a certain head gasket thickness. does this make sense? lol!

.200 in the bore doesnt sound right. 0_o
what is bore and compressed thickness of gaskets used?

.200 in the bore doesnt sound right. 0_o
what is bore and compressed thickness of gaskets used?

bore is 4.04, not sure on gasket, trying to see what thickness to use. this is not an ls motor

sound like sbc/lt type build
ur gonna prolly want to run as thin as possible gasket with piston being that deep bore in the hole.
i have always like to kept 0 deck for sbc/lt at least.
and always minimum
+.010 protruding for ls motors
what gasket u plan on running? its not gonna be same as bore of block. has to be bigger.
assuming u were using a theoretical 4.125 bore by .030 compressed gasket: the above engine specs out to around 8.39:1 scr

ok i think im on the right track,

cylinder volume, http://www.online-calculators.co.uk/volumetric/cylindervolume.php

convert cubis inches to cc's, http://wiki.answers.com/Q/How_many_cubic_inches_are_in_1000_cc

the piston being that deep in the bore at tdc may affect quench distance.
i like to keep quench in engines ive put together around .035-.040 at least for all builds from n/a to psi
but thats just me

ok i found this

http://www.csgnetwork.com/compcalc.html

and yea that was my next question, i prolly need to go as thin on a gasket as possible, what the thinest i should go? and yes its a lt build. im plannin on runnin 20+psi of boost,and race gas. im not to familiar with quench!

the above calculator is pretty accurate. same numbers i got. i figure my scr and dcr by hand with sheet of paper and calculator. i also figure rod/stroke ratio, quench, amount to mill heads, dcr if have cam card etc. i havent found online calc. yet that has all those features.

hmm, thanks for the replies, what gasket you recommend? felpro or cometic? also would there be any disadvantage of running the thinnest gasket possible? i just need to figure out my piston to valve!

prolly thnnest mls u can get. bore doesnt really matter as long as its bigger than 4.04. i dont think u will have too many ptv clearance issues with the piston being that far away at tdc. lol
i always keep at .100 minimum for ptv clearance for both valves
.200 is dam way in there. i dont think ive ever heard anyone going with the piston that deep in the bore.

It sounds like you have the wrong rods.

yea running a 6" rod piston on a 5.7" rod? that's the only way i see this happening...

20psi? It'll be fine. For some reason, boosted engines don't really like quench. They tend to make power when you run quench REALLY loose, but I don't. .200" sounds excessive, but I don't think it'll hurt anything.

Got any part numbers on your piston/rod combo?

.200 in the hole is beyond unexceptable. with your 58 cc heads, your going to have a 92cc's above the piston @TDC without the gasket....with the excessive quench volume, that flame is going to be so weak, even under boost.

.200 in the hole is beyond unexceptable. with your 58 cc heads, your going to have a 92cc's above the piston @TDC without the gasket....with the excessive quench volume, that flame is going to be so weak, even under boost.

That's the point. Heavily boosted engines typically don't like quench. I agree that .200" is a lot, but what I'm saying is that I don't think it's going to hurt anything since he is planning on 20psi and race gas.

:corn: