streetracing.org - View Single Post - Anyone good in math? I need help finding my compression ratio..

Dean · 01-13-2006, 02:11 PM

Ok, I'm trying to figure this out..

Stock compression is 8.5:1

I picked up some forged and coated 8.0:1 Pistons

Also got some ported heads with 5 thousands taken off (.005). I'm told every 30 thousandths (.030) taken off is .5 increase in Compression. So if I only take off .005 how much am I raising it?

Also, Stock head gasket thickness is .062". Running a thicker gasket will decrease compression, while running a thinner gasket will increase compression, For every .006" change in gasket thickness you will add or subtract .1 point of compression. I'm going to be running .052 thickness head gaskets.

Can anyone help me find my overall compression ratio?

Thanks!

01-13-2006, 02:11 PM	#1 (permalink)
Dean www.bayarearacing.org Join Date: Oct 2003 Location: milpitas Posts: 476	Anyone good in math? I need help finding my compression ratio.. Ok, I'm trying to figure this out.. Stock compression is 8.5:1 I picked up some forged and coated 8.0:1 Pistons Also got some ported heads with 5 thousands taken off (.005). I'm told every 30 thousandths (.030) taken off is .5 increase in Compression. So if I only take off .005 how much am I raising it? Also, Stock head gasket thickness is .062". Running a thicker gasket will decrease compression, while running a thinner gasket will increase compression, For every .006" change in gasket thickness you will add or subtract .1 point of compression. I'm going to be running .052 thickness head gaskets. Can anyone help me find my overall compression ratio? Thanks!