Compression Readings

[mikeyd 13]

what would you expect the compression to be on a 1600? just done mine and they vary from 100-155 psi![probably acounts for the missfire at the 3 counties last w/e!] head off tomorrow night i think

[omega 82]

depends on miles but 100 is very low,they should all be close

have you done a wet test?

[dcc 855]

should all be reading around 195 iirc

[j_turnell 137 3 Cars]

Anything from 150 upwards really but no bigger than a 10/15psi difference between cylinders.

[TU_Later 0]

What sort of compression should I look for in a standard but freshly rebuilt 1.9, skimmed 20thou to run 10:1 CR?

[Anthony 1,003]

What sort of compression should I look for in a standard but freshly rebuilt 1.9, skimmed 20thou to run 10:1 CR?

Should be in the region of 190-200psi really on an accurate tester* once the rings bed in full (assuming they were replaced during the rebuild)

 

* generally speaking though, highish figures and all fairly equal is what you're looking for, as some cheap compression testers can show some questionable accuracy in terms of the actual figures they produce.