well i bought this built/sleeved h22 shortblock thats suppose to have 9:1 compression but i did a compression test today and it reads a little high

i disconnected the ecu fuse/took out all the plugs and wires and i did it about 2 mins after i was driving for about 10 mins. is it b/c i didnt take off the injector clips too is that why its reading kinda high?

cyl1= 210 cyl2=205 cyl3=215 cly4=210

i know its sleeved and has forged internals so, whats up? could it have 9.5:1?

HERE IS A PIC OF THE TESTER GUAGE:

 

a pic of a gage doesn't mean anything. is the gage calibrated right. try getting it calibrated and do the compression test again.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fafsa &raquo;</TD></TR><TR><TD CLASS="quote">i did a compression test today and it reads a little high

cyl1= 210 cyl2=205 cyl3=215 cly4=210

i know its sleeved and has forged internals so, whats up? could it have 9.5:1?

</TD></TR></TABLE>

My H22 was nothing under 265 per cylinder, my compression ratio is 10.6:1 (JDM)

Shouldn`t your stock compression be 10:1 ? (IE your numbers sound bang on)



Modified by simon98h22 at 3:42 PM 12/3/2004

 

Those #'s sound right on the money dont worry about it.

 

those numbers sound good my euro r motor was tested and came out to 250 a slug (11:1)

 

IIRC, compression #'s can vary across parts of the country due to elevation.

It sounds like it's pretty good, I wouldn't worry.

 

if its 9.5:1 wouldnt that seem a lil high, but they are all within 5 of each other which is the most important thing

 

My JDM H22A was 210+/- 2psi :D

 

theres really too many factors to try and judge your compression ratio from a compression test, as long as they are consistnat across the board dont sweat it too much