90mustangGT I felt sorry for girls because Founding Member Jan 15, 2002 2,773 17 89 Dallas, GA Dec 15, 2004 #1 Dec 15, 2004 #1 What is the formula to figure out what compression ratio a combo will have considering the piston and chamber. I am thinking of getting a set of flattop DSS Forged Pistons and I will be re-using the Thumper Heads with stock 61CC chambers.
What is the formula to figure out what compression ratio a combo will have considering the piston and chamber. I am thinking of getting a set of flattop DSS Forged Pistons and I will be re-using the Thumper Heads with stock 61CC chambers.
giddyup306 Founding Member Oct 22, 2002 3,041 2 59 Dec 15, 2004 #2 Dec 15, 2004 #2 cr=ccv+vndv-pdv+hgv+scv/ccv+vndv-pdv+hgv
Funanin Founding Member Nov 26, 2001 356 0 0 Horsham, Pennsylvania Dec 15, 2004 #3 Dec 15, 2004 #3 or the piston volume it takes up during stroke divided by the clearance left in deck height and chamber volume.
or the piston volume it takes up during stroke divided by the clearance left in deck height and chamber volume.
FiveLtrRiceEatr New Member Oct 2, 2004 197 0 0 Michigan Dec 15, 2004 #4 Dec 15, 2004 #4 use this c/r calculator at ford muscle.com http://www.fordmuscle.com/calculators/compression.shtml used it for finding my dad's c/r on the 408 stroker
use this c/r calculator at ford muscle.com http://www.fordmuscle.com/calculators/compression.shtml used it for finding my dad's c/r on the 408 stroker