safe compression readings

[Daytonawim]

how do you do the leakdown test and get the figures out of it ???

I tryed it once with no head on the car, but i wanna check a replacement engine
now, and dont pull the head.

Help me plz

[minimopar]

Just put the stock stuff back in (ECU, injectors, and MAP).

[glhsken]

Yep... Do what Russ said.

FWIW, Moly rings should seat immediatly. Just did my daughters car, started it up, WHEW... smoke everywhere. Ran it up the RPM scale a few times and presto. Within 10 minutes in the garage.. seated. Ran it with the stock computer no gimmicks to keep the boost down.

On my own GLHS, I've swapped pistons, threw it back together and within 5 miles blasted it at 20 psi. I see everyone on this board saying "you have to hone it". As long as ma mopars original hatchings are visible, I don't touch it. Never had a ring pack not seal. The rings are finicky and the hatch has to be perfect... something I doubt many of us are capable of.