Compression test results sr20det!! help plz!!

[Dion_180sx]

hey guys my sr20det had a compression test done.... now apparently it dropped 50psi between cylindrs 1 & 2 im not sure of figures but assuming 150 to 100!

now my engine is in perfect running order, doesnt loose one drop of oil in 5000ks, doesnt blow any other smoke out the exhaust, other then black fuel! she drives like a dream and pulls really good power for its mods! iv never had an idle problem, starting problem or anything meachanically really, i was assuming the compression would come up trumps as i knew it was an a1 engine!!

now what the hell could be wrong with it, im sure its not piston rings at 50 psi loss!! is there anything else that would give me compression loss of that severity with no symptoms whats so ever!!!! any operator error taht could have caused this? i.s. mechanic was a nuffnuff???

help would REALLY be appreciated! and i will get a second opinion asap!!

danny

[400kwgtr]

sounds like the best thing to do is forget about the compression test. from the sounds of things you are happy with the way your car runs and it is making good power. what you dont know wont hurt you...

[Dion_180sx]

yeah i know but im still worried that there is a problem now, should i take it easy, should i not run 1 bar etc? i just dont want it to go "bang" what other problems could it be... valve seals? (is there still oil loss with these?

and i wlways thought that with a 50 psi difference there woyld be some serious symptoms?? is this right?

[Chris32]

Maybe a dodgy valve, not sealing right?

Not sure???

[dkonig]

Maybe get someone else to test it again, and then try doing a wet test.

Daniel Konig

[Steve]

See if you can get a leak down test done, if that shows up OK, get the compression test redone.

A leak down test is easy, easier than a comp test, but you need the right equipment

[Dion_180sx]

UPDATED

i got the compression test re-done this afternoon, now the results are much better but i thnk thier all a little low!

cyld 1 128

cyld 2 125 *took a little longer to reach this figure, compared to the other ones**

cyld 3 128

cyld 4 128

these seem quite low to me, the car was at temp, and the throttle was fully open, cylinder 2 took a little longer to get to its figure to!! and i didnt disconnect the ignition either, would this give me low figures, and battery was struggling??? i dont know if these low figures are of a concern? anyone, im just now glad that there isnt a 50 psi diff betw 1&2

cheers guys

[blind_elk]

If the battery is struggling a bit, then the figures will be lower than expected.

[Sydneykid]

As Steve said, get a leak down test done, much more accurate, no cranking required and you can check, via wet and dry leak down tests, whether rings or valves are OK.