i put my car through hell and yet it still lasts but is 150 compression ok for a b18a ? its all 4 , car dont smoke or nothing and it runs strong.. just wondering.

 

seems lowwww but idk about b18a's

my b17a with 9:1 pistons is 180across

 

Those numbers so seem low, but they are consistent.

Try doing the compression test with the throttle wide open on a warm motor. That should yield higher numbers if you did the test with the throttle closed.

Usually, compression tests are used to look at consistency between cylinders. It is by no means an accurate test for pin-pointing problems. Leakdown test is much more accurate if you are troubleshooting.