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Thread: sr16 piston compression test

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Posts: 1-10 of 24
2012-10-02 20:04:41
sr16 piston compression test
what reading is everyone getting running these pistons??

i got 275psi across the board just trying to make sure its in the right range
2012-10-02 20:07:07
I have seen 320psi on a 228whp motor!!
2012-10-02 20:07:13
i'll be checking mine this week. i think it's normal for 250psi-broken guage pressures. lol.
2012-10-02 20:10:29
The motor is fresh though, should I wait for the rings to seal properly and try again?
2012-10-02 20:14:47
It should be 300psi or over!!
Did you did a valve job or checked for bent valves, piston ring end gap clearance??
2012-10-02 20:22:42
Haven't checked for bent valves and the rings were checked when I installed them
2012-10-02 20:52:09
Pegging a 300 PSI comp. tester seems to be the norm. You have the right idea though, with giving the fresh build a bit of time to improve the ring seal. How many miles on the engine?

Plus, it's even across the board so that is a good sign.
2012-10-02 21:00:50
Not even a mile lol drove like crap and my wideband decided to stop working so I parked it
2012-10-02 21:24:10
^ Good decision on parking it. If you are worried, you can pop the valve cover and verify the cam timing. You could also check the valves with a bore scope if you are really worried but I'm guessing you are probably fine if the cam timing is good.
Last edited by B15NEOVVL on 2012-10-02 at 21-25-04.
2012-10-02 22:19:36
what procedure are you using to check the comp ratio? also is your cam timing 100% right?

Last edited by happyharrysco1 on 2012-10-02 at 22-20-23.
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