What's normal/low/high compression for a healthy ka motor

Post by **DRIFTEADOR** » Thu Dec 30, 2004 5:30 am

Before I buy it I want to make sure the motor can be boosted. So far I've seen 170psi with ~10% difference between cylinders. sound good? what were your numbers before boosted vs. now? I remember reading somewhere that one member's compression went up after boosted. probably from carbn build up from running rich.

Post by **nissanfanatic** » Thu Dec 30, 2004 6:57 am

Mine was:#1-190psi#2-190psi#3-185psi#4-180psi

After 1000 miles of boosting. 135000 miles on the engine. The tech specs are

Factory-179psiMinimum-151psiMaximum difference between cylinders-14psi

I think my high readings may have something to do with the synthetic oil. Who knows.

Post by **DRIFTEADOR** » Thu Dec 30, 2004 7:30 am

thanks. do you by chance know the specs for a sr? not really off topic, but probably not the correct forum to ask...

Post by **Structure240sx** » Thu Dec 30, 2004 10:14 am

factory SR compression readings is about 170psi IIRC. theres a chance its 165psi or 175psi. off the top of my head it is 170psi for a perfect motor

What's normal/low/high compression for a healthy ka motor

What's normal/low/high compression for a healthy ka motor

Re: (nissanfanatic)

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