Seeing that I have the 95 GSR Factory Service Manual right in front of me and it says the nominal psi is 270, the minimum is 140, and the maximum variation is 28, I think Alldata needs to research that a little harder.

Trust me, I have done several compression tests on my GSR and I have never seen a number lower than 200 psi, so I don't think 160 psi across the board means anything but a serious situation.

I think the information is meant for a lower compression LS motor, not a GSR because those numbers are way too low.