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Compression #'s

389 Views 3 Replies 1 Participant Last post by  RacerRT
What should the compression read on a NA Supra? Mine are between 170-175 and fall after cranking.
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Standard compression is 186, minimum is 156.
Your just taking the highest the guage reads on each cylinder... so you should be fine.
Thanks. So, it doesn't matter if it falls rapidly?
Nope, it will fall, because you are losing cylinder pressure as you crank. Your just looking for the highest reading, and should only need to turn it over for 2-5 seconds per cylinder.
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