Question about Compression?

[dirkdiggler]

Im just wondering how much difference in compression between a .050 and .060 thick head gasket will make?

What would you assume my compression should be at with the following:

701 61x
Stock bore/porting
Red Westcoast "gasket Head" with 30cc domes
.050 thick gasket

What compression should I be at??

Any help is much appreciated

 

[SUPERTUNE]

Very little difference with .010 between a .050-.060 gasket
if the gasket bore is 82.25mm the .060 gasket would displace 7.9cc's,
the .050 gasket would displace 6.7cc's, the difference is 1.2cc's

I have always used a .052 figure with the stock gasket @ 7.0cc's
Stock Std. 701 head is 34cc's.
So add these together and get 41cc total for head and gasket.
On most 61x stock standup Superjets everyone mostly uses a 35cc o-ringed head with no gasket.
The difference would be 5cc's of raised compression from a stock head and gasket going to an Aftermarket 35cc head dome w/ no gasket

These #'s don't really figure cranking pounds but are relative...
I use measured cc's for mechanical compression ratio's for my engine builds.

 

[chasingdaylight]

Very little difference with .010 between a .050-.060 gasket
if the gasket bore is 82.25mm the .060 gasket would displace 7.9cc's,
the .050 gasket would displace 6.7cc's, the difference is 1.2cc's

I have always used a .052 figure with the stock gasket @ 7.0cc's
Stock Std. 701 head is 34cc's.
So add these together and get 41cc total for head and gasket.
On most 61x stock standup Superjets everyone mostly uses a 35cc o-ringed head with no gasket.
The difference would be 5cc's of raised compression from a stock head and gasket going to an Aftermarket 35cc head dome w/ no gasket

These #'s don't really figure cranking pounds but are relative...
I use measured cc's for mechanical compression ratio's for my engine builds.

ding !! ding!! huston we have the anwser. chuckie you a riot.. i had to read it like 10x ... those are like the little tiny line when measuring right ...:beerchug:

 

[dirkdiggler]

thanks supertune..........explained it perfect!