Does this sound Correct?? Compression woes..

[SixSpeedSleuth]

So, I go to the business where I got my motor to tell them what the compression was, and they tell me that a compression of 125 is normal for an SR20DET. From the countless pages of information I have gathered says differently. Somebody please tell me what the compression should be. My compression is 125,123,75, 128. Something is not right. Opinions?

[virus77]

one cylinder usuall means broken rings or ring lands or a valve. My bet is on broken ring land. Drop some oil in the low cylinder and see if it raised the compression.

[SixSpeedSleuth]

Yeah, I did drop oil into that cylinder, and it did not change the compression. So, I'm not sure. Would a compression of 125 all the way across to low?

[SixSpeedSleuth]

Bump?

[sil beer s13]

well

mine check out about 150ish

[grey_240sx_man]

125 would be the lowest. 159 is the the most optimal. 155 all the way across is what I run. still can't be 15 apart though and definately not 50 apart. Good Luck

[virus77]

if it didnt change compression then it could very well be your ring lands or a valve. My guess is still on ring lands. you can pretty much eliminate head gasket since the ones next to it are fine and its not your rings either.