what should compression be in each cylinder be for a boostlogic 2.5 mm headgasket. i was showing 70 now then it shows 120 in the same cylinder what shld they all be

 

Hmm, doesn't sound quite right.

Is the engine warm? You need to warm the engine to operating temp first.

If it's a GE spec is 156psi minimum to 185psi

Not sure with that headgasket since it does lower your compression a little.

Call Boostlogic and ask them tomorrow.