Quote Originally Posted by TyphoonZR
I am purchasing new bare heads rather than resurfacing, pressure testing etc my old ones. The price difference is only $80.00 each. I am not decking the block other than cleaning it up. My current compression ratio is 21:3 stock, so what gasket thickness do I need to bring that down to close to 18:1? Thanks in advance.
I can't find all my formula's.
You will need the inside dia. of the head gasket.
3.14 X radius which is 1/2 the dia. of the dia.of the head gasket squared=area X gasket thicknness.
To convert cubic inches to cubic centimeters.
X 16.387.
One other are to think about is the injector spray pattern and how will the cone spray pattern change and also pressure loss because of the great distance it will travel.