I am doing a compression test on a ls/vtec with srp 9:1 pistons and crower rods. The head is off a 2000 Si B16 the bottom end is from a 98 ls. It has a drag turbo kit on it also. Not sure if that will affect the compression but wanted to give all the details. What should the compression numbers be? I am looking to maybe purchase this car but I want to make sure that it has good compression and in good working order. TIA

 

I would expect the compression to be in the 170 range, i'd also do a leak down on it as well.

 

180-200psi per cylinder is average.