I was surfing the web for good info on compressions tests and came up with this. after comparing some tolerances in service manuals with this guys formula for finding your ideal compression i found this article to be right on the money.

http://www.pumaracing.co.uk/comp.htm

Please read it and if i am at all wrong with this let me know. As i need to do a compression test and would like to know how my engine is internally after the fresh rebuild.

I NEVER did it with WOT. I always did it with the TB closed.

Also, the Ho runs on 10:1 compression and get 215psi of compression. So they are a bit off on their scale.




Gilles
2.3 Ho

I've never done it WOT either..... not that I can see that it would make a difference...... I guess I'll try it and see.




SPD RCR Z - '02 Z24 420whp
SLO GOAT - '04 GTO 305whp
W41 BOI - '78 Buick Opel Isuzu W41 Swap

Nice link, it's about time I did another compression test on mine.


15.3 @ 89.97mph, 14's on the way?

I get ~190 on 3 cylinders and 182 on 1.