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Compression test on Turbo

jonnyporsche

PCGB Member
Member
I have just done a DRY compression test on my 87 Turbo, please can someone in the know conform if these PSI readings are ok?
1. 140
2. 135
3. 140
4. 135
Thanks
 
Hi John

I think but could be wrong (memory) that a very good pressure is around 150psi for the turbo (this may be new reading). Your not a million miles from that, what I do know for sure is that they all need to be close to eachother in their readings...Yours are all similar, so good in that respect. Perhaps someone else with a better memory can confirm what the new reading should be?

Pete
 
Just did a quick search on google, looks like your readings are above average...one comment stated that 145psi is what the manual states for new...it's a forum so no guarantee that it's correct
 

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