How To Calculate Compression Ratio

Dec 12, 2006if i were to run a g4cs crank w/ 9:1 compression ratio je pistons (rated w/ stock 4g63 stroke), what would i be looking at for compression? Sep 21, 2015there isn't a fuel that likes more compression than others, all fuels respond the same way, more compression = faster flame speed = increased thermal efficiency. Sep 19, 2007this increases the pressure and it increases the compression ratio.

Compression ratio is the measure of the cylinder volume and the head volume compared to just the head volume. May 1, 2009you can calculate compression ratio from compression numbers. The engine looks nearly new, so by doing a compression test you should be able to tell which pistons he used.

Oct 25, 2013my engine has a calculate compression of 11.5:1. My friend engine has a calculate value of 12.7-13:1. I engine compression test 245psi and his.

Aug 22, 2012replies 3 views 2k sep 27, 2008 tunatalon how do i calculate compression ratio 4g63 stroker duke52 dec 12, 2006 stroker tech replies 1 views 6k dec 12, 2006 Nov 20, 2002the compression ratio for the turbo is p2/p1, or inlet pressure divided by outlet pressure (in absolute pressure of course). Jun 5, 20069:1 will be fine for your motor, but as mentioned, your ecr (effective compression ratio) will rise thereby bringing on the onset of knock that much sooner on pump gas.

Nov 29, 2004there is a lllooottt more to this than just picking a compression ratio piston and thinking this is the end all decision of your build. Apr 5, 2012never said that compression equals compression ratio.