Quote:
Originally Posted by KAT-PWR
One more time for the people in the back.
What is that picture of? That is a compression tester, not a leak down tester... 90 PSI is not good. Is that after you cranked a few times then did you just let it sit? Because that is not how a leak down test is done. What compression pistons do you have? Look like 9:1, you shouldn't be seeing 210 on a compression test cold.
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Yeah I was wondering why the compression jumped up after the rebuild, I figured it had to do with all the oil in the cylinders. The head has been decked twice and the block once. Pistons are cp 9:0:1 was getting about 150, 145 before the recent rebuild due to blown headgasket/ detonation in all cylinders
It's a custom leak down I made from an old compression tester. The harbor freight one wasn't cutting it. just subtract from 100 psi. So 90 would be 10% leak down