Just wondering what some of the average #s are when you have done a compression test on your LS motor???????? Please post the mileage and modifications done to your motor. I would prefer stock #s if anyone has them... TiA...

 

 

when i had my stock LS engine it had about 180-190psi across all 4 cylinders.

they may range from 170-210psi depending on the milage and condition of the engine.

 

The B18B standard is 199psi, with the minimum being 135psi and the max variation being 28psi just as with all B series motors... Good Luck