My H22 build is complete. It was tuned and driven on for about 60-100 miles. The compression numbers are 170 across. Should these numbers be higher or about right? Here's my setup:

GE HD Sleeved H22A4 87mm
GE Headgasket
CP Pistons 9:1
Pauter Rods

Stock head, everything else stock. Is 170 about where it should be? The car was tuned immediately according to Earl's recommendations. Thanks guys.

 

Sounds a tad bit low but if they're all the same then you should be good to go.

 

my numbers on my motor 87mm bore w/ 9:1 comp. via JE pistons are 187psi-190psi across the board..w/ a less than 2% leakdown

numbers might be alright because of consistency..
but it wouldn't hurt to do a leakdown...

 

I was told that the numbers should gradually go up. I only drove it for a minimal amount of time so maybe the rings haven't completely seated yet.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pikachu &raquo;</TD></TR><TR><TD CLASS="quote">I was told that the numbers should gradually go up. I only drove it for a minimal amount of time so maybe the rings haven't completely seated yet. </TD></TR></TABLE>

Rings seal way faster than you think they do..

If you broke it on the dyno -- then the rings are sealed (if they ever will be). Numbers look a bit low - but compression tests can vary from conditions to procedures etc. Consistency is a good sign. Try a leak down - if its good, run another compression test.

 

They will, dont worry. 100 miles isnt very long. I logged my compression numbers and by mile 250 they were 75% of maximum and gradually increased to full 100% compression rest over the next 500 miles.

 

It was street tuned and it wasn't broken in hard. I had it going with flucuating rpms. I didn't go nuts and hit redline though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">They will, dont worry. 100 miles isnt very long. I logged my compression numbers and by mile 250 they were 75% of maximum and gradually increased to full 100% compression rest over the next 500 miles.</TD></TR></TABLE>

did you break it in n/a or with boost?

i have a pretty similar set up besides, 89mm, rollerwaves pistons,manley rods mine compression is 210/205/208/210

when i first broke in the motor n/a it was 210/210/210/210

 

N/A of course. I will soon see what happens.

 

I think he was asking me. Broke it in NA using Motoman's guidelines.