Mr.Kelley,
can you please use your calc. and tell me what you come up with, cause i'm just to impatient to figure it out.
dont know gasket cc's or piston cc's or piston to deck cc's
what i know is as follows;
64 cc combustion
federal mogul hyper. 4 valve relief 4.060"
350 stroke (3.480)
felpro stock replacement gaskets.
piston to deck measured with straight edge @tdc
is .0010
i've tried numerous times but feel i just aint gettin' her right.
will i be safe running the 280h cam with this combo on the pump???
and could you give me my final cr.
thank you very much i really do appreciate your time and help.
shane r.
also wanted to thank you for saving me a couple bucks on the comp "magnum"lifters thing.
ht817-r's it pays to research!!!!!

ttt

i used Pat's calc.

Assuming you're piston/deck clearence is correct.

.041gasket/6ccPiston = 10.301
.041/5cc= 10.42
.041/7cc = 10.185

.039/5cc = 10.472
.039/6cc = 10.354
.039/7cc = 10.237

Average = 10.328

is that safe for pump gas?????
thank you
shane

email Pat with the compression ratio and specs on the cam you plan on running, he can run the DCR calculator and tell you if the combo is likely to run on pump gas or not. the DCR calculator doesnt work on my computer so you'll have to ask Pat.

thats why i posted the question...
thanx,
shane

Hey, I'm back.

I'll try.

Did you mean .0010 or .010" deck.

10.22 SCR with .0010", a .041"x4.166 gasket, and 6cc valve pockets (Flat tops, right). 8.08 DCR, fine for pump gas. The same with .010" deck is 10.00 SCR, 7.92 DCR, fine for pump gas. This is with a 110 LSA and 106 ILC.


Enrique, my numbers differ because I added for the space above the top ring.

good!!thank you very much,i do appreciate it.
yes they are flat 4valve pistons.
actually those numbers should be perfect for the street huh?
shane

I don't see any problems.