What kind of numbers do you get when you do a compression test?

 

With an 11:1 H22 at close to sea level I got 225-230 psi.

 

wat cams and what temperature and is that with stock pistons?

 

same question here. I'm pushing out 265-270 across(in seattle area, not sure what the elevation is here) on my JDM h22a(came out of an auto ). I've been trying to figure out what compression ratio I have cause supposedly, these numbers are high for a stock motor. (I'm still on stock internals).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93h22a1vtec &raquo;</TD></TR><TR><TD CLASS="quote">wat cams and what temperature and is that with stock pistons?</TD></TR></TABLE>

I have Crower stage 3's so they probably drop the compression #'s a little bit due to some overlap. Cams with no overlap (like stock) might be around 240 psi I guess. The tests were done with a warm engine, jdm block with flat valve faced valves, & a slightly milled head.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2lude4u &raquo;</TD></TR><TR><TD CLASS="quote">

I have Crower stage 3's so they probably drop the compression #'s a little bit due to some overlap. Cams with no overlap (like stock) might be around 240 psi I guess. The tests were done with a warm engine, jdm block with flat valve faced valves, & a slightly milled head.</TD></TR></TABLE>\

pm sent

 

My old H22 with type-S pistons and cams was at ~240 psi at 500' elevation. But it varies depending on what compression tester you use. More/longer hose affects the PSI reading and cams drop the pressure too.

Pirate

 

bump

 

dude compression test psi are not something to estimate your ratio with, they vary too much....its just like a dyno, you cant compare across manufacturers....

the only thing a compression test should show is consistent numbers....