95FbFormula

iTrader: (25)

Can anyone give me a compression estimate for a 355 with -5cc flattop pistons, zero decked block. 56cc combustion chambers on the heads and a .029 thick gasket.

1redta

input all that info into kb silvolites compression calculator....or you could probaly search that since it is a common setup Took me 5 seconds 11.816

PortPros1

I have 11.73 to 1, if you truly have a zero deck with a .029 head gasket your pistons will hit the heads at high rpm, you need a minimum of .038 clearance between the pistons and the heads.
That .038 number is using good bottom end parts.

Harold

dhdenney

iTrader: (53)

http://www.torinocobra.com/Randys_tools.htm

95FbFormula

iTrader: (25)

Thx for the advice that would have been a costly mistake i wouldn't have known. a .038 would be the fel-pros i assume but i might just go with stock lt1 thickness to be on the safe side then. Thx for the compression inputs everyone i was between getting a set of ported trick flows and milling them to 56cc chambers but i might just use the stock castings

95FbFormula

iTrader: (25)

I guess another question would be is should I leave the deck height of my block stock with my set-up in my sig or with a zero decked block spinning the motor to 7k what size of head gasket should i go with. assuming the heads have been milled.

Ken95Z28

iTrader: (1)

Mine has been zero decked and running the FelPros and have no issues at all.

siniSSter

iTrader: (2)

+1---Zero Deck must use a 0.39 gasket....