Jacks62

I am doing a compression test on my 62 Starfire. Does anyone know what the pounds should show. It is showing 90 -100 lbs on each cylinder. i'm not sure what the ulta high compression 394 should show. Thanks. Jacks 62.

oldcutlass

That sounds about right dry. What happens when you repeat the test after squirting some oil in each cylinder?

Jacks62

Thanks. I'll try that this week end.
jacks 62

Allan R

Which version of the 394 do you have?
May I suggest the compression test is low? Have a look at this thread, it deals with some of the same issues. https://classicoldsmobile.com/forums...tml#post233926

Jacks62

this is a 10 .25-1 engine. Thanks for the link.
Jacks 62

my442conv

on a 1970 455 with a steady oil pressure of 50 psi............would that be good?

RetroRanger

I recently checked out a 70 350

compression was 150 psi in most cylinders Alans link shows that to be in the middle of the good range