Compression Test on a Redtop SR20...

[2_Liter_Turbo]

Ok, I have a 93 Late Model Redtop SR20DET, and I ran a compression Test for the first time (been driving the car for over 20,000 miles now, lol).

The S14 Service Manual (I assume that it is very similar if not the same) states that the standard Factory compression should be 156 psi, with a minimum of 128 psi. Also that an acceptable difference between cylinders is 14 psi.

My SR:--------------#1: 145 psi#2: 130 psi#3: 143 psi#4: 135 psi

So my question is this. My compression is well within spec, but I do have a difference between cylinders of about 15 psi. Should I be worried? Or should I just take in account human error in reading the gauge? Also, will I be fine by putting on a GT2871R?

[efrain240sx]

I would do a leak down test before putting on a bigger turbo, just to find out were youre losing compression through

[sr20-thoj]

I dont think itll be a good idea for that turbo.. you can sell it to me.. j/k..

[S13240]

Could be human error, but you should try it again and see what your compression is with a warm motor.

[deCksy]

have you done anything to the motor? new gaskets or anything? rings? if not, then most likely it'll keep on decreasing... and with the new bigger turbo it'll wear out faster... it probably wont wear out much faster, but you'll be pushing it harder.