compression question
 

i know peeps saying 6.0 is the lowest before a engine rebuild. but i got some bunk compression numbers. he said some sh1t like 90 psi or some crap like that. whats that equivenlent too? 7's? dont know hehe

thanks in advance

A new good condition engine should be around 100 psi... so yours is pretty damn good

curiousity...
 

What's a good number for a stock '82?

With a somewhat messed up gauge(about +25 from 0) I was getting a reading front & rear of 149. I figure if the gauge was still working correctly and just had a bad 0 that means I'm getting about 124...

Just curious,
BrianHeston

Actually, the MINIMUM compression for an FD is 100 psi. This is supposed to be measured at 250 rpm at 0 elevation. There are correction factors for different cranking speeds and elevations. Assuming the rpm and elevation are correct, 90 is a bit low but you should have six numbers. If they are all close to 90, I wouldn't worry about it. Your cooling seals will likely go out first.