going to be doing a compression test tomorrow due to burning too much oil, i suspect it`s the turbo but want to rule out the engine before i spend on rebuilding the turbo, so question is what are the compression ratios on a V3 Type RA STi? or what sort of figures should i be looking at for a healthy engine?

 

IIRC, the minimum compression pressure should be 142psi with the engine warmed up and the throttle wide open when cranking for the compression test.

Mick

 

oky doky cheers for the info