well just finish throwing in my b18b. everything seems fine, runs pretty strong. but its kind of smokey. so i decided to do a compression test. at first i did the test, i forgot to unplug the ecu fuse, and cranked only 4 times, it read 125 100 125 125. keep in mind this is my first time. so this time i read the instructions carefully, i pulled the ecu fused, and cranked about 10-15 times on wot, and my readings were 150 130 150 150 all across, isnt these numbers way too low? i did the car at operating temperatures as well same readings. i even threw a cap full of oil in and it jumped to like 195 195 180 185... so i dunno what to do. is it my rings? this motor is seeing boost real soon thats why im worried. thanks in advance for the help.

 

any help?

 

yes they are low, the motor looks to be a high limage motor most likley. you most likley are going to have issues with it. time for a new one or rebuild.

 

The numbers will also differ from gauge to gauge. Your real concern is that the numbers shouldn't be too different. If a number is different from the rest by 20 then you have a problem.