Ok I read the compression test numbers are suppose to be between 170 and 225 for stock. Well I did a cold test today and only did a cold test because I am in the process of checking my cooling system becase I though I had a blown headgasket, but turned out to be a hold in the heater hose and hadn't had time to allow my car to fully warm up without losing a LOT of coolant. But to my understanding, cold test numbers should be lower than hot test numbers. Anyhow, the results of my test are as follows:

Cyl 1 = 220
Cyl 2 = 230
Cyl 3 = 215
Cyl 4 = 240

Now are these numbers ok? Or might I have a problem? My engine was rebuilt with parts from parts dinosaur, so I don't understand why my numbers are so high and/or why they seem to be all over the place. Am I good, or should I start looking for a problem?

-Ben
Black 1999 RS

Basic mods and a South Bend OFE-SS Clutch
~150bhp.....for now!

New results (hot test this time)

Cyl 1 = 215
Cyl 2 = 230
Cyl 3 = 210
Cyl 4 = 235

-Ben
Black 1999 RS

Basic mods and a South Bend OFE-SS Clutch
~150bhp.....for now!

The compression test reveals the condition of your piston rings. If the engine was recently rebuilt, it could be that the machinist who gapped the rings did things on the tight side since this is a naturally aspirated car. Those numbers are solid. Don't sweat them, imo.

^^^^ +1

those numbers look very solid to me. have fun

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

Ok good, that was one of my worries with my idle and/or headgasket problem. Good thing that is off my shoulders now. Thanks guys.

-Ben
Black 1999 RS

Basic mods and a South Bend OFE-SS Clutch
~150bhp.....for now!