coreyhayman

did the test with the motor at operating temp and all plugs pulled with the throttle at wot. Dont these numbers seem low to you? My car used to pull alot harder but now seems sluggish

cyl#1 160
cyl#2 170
cyl#3 170
cyl#4 170

preludedriva

when i had my h22a my comps were in the 230s in each
so in a h22a1 they should prolly be round 215-220

coreyhayman

yeah these numbers all seem really low, i over revved the motor one day by accident, pegged like 8700rpm..bent valves maybe?

coreyhayman

just talked to a mechanic and he said those numbers are normal for a usdm h22a1, im still thinking there to low

envee

i can't remember the exact compression ratio on a h22a1 but the numbers should be up over 200 i think.

envee

Engine compression
8:1-8.5:1 c/r = 150-170 psi per cylinder
8.5:1-9.5:1 c/r = 170-210 psi per cylinder
9.5:1-11:1 c/r = 210-275 psi per cylinder

Dann6968

Was the engine warm?

coreyhayman

yes engine was at operating temperature and thorttle was at wot.

WhiteOnRice

I know a place around here that sells "only the best compression tested engines." Their cutoff for "the best": 150 That's including JDM engines.