Originally Posted by nate91si
Indeed I do. It's internals arent stock, so it's not a suprise to me. I have also done a compression test with a different gauge with the same results... I guess it's the cams that is throwing the formula off...
Jeff Evans (Evan's Tuning) gave me his rule of thumb:
8:1~8.5:1 compression: 150-170 psi per cylinder
8.5:1~9.5:1 compression: 170-210 psi per cylinder
9.5:1~11:1 compression: 210-275 psi per cylinder
11:1+ compression: 250+ per cylinder (highly depends on cams being used)
that rule is vague at best. every near stock compression ls i have done has put out between 175 and 180. 210 is close to 10:1