Compression Test Adjustment for Altitude?

[mikesoob7]

Hi,

I searched for this topic but wasn't able to find anything. I've got a '91 Legacy with the 2.2 L. I've heard varying instructions on adjusting the compression numbers for altitude. I'm currently at 8,000 ft. so should I add 16 psi (2psi/1,000ft.) to the end result on a cylinder or just read the numbers at that height? If I use the compression ratio of 10:1 for the engine (I think that's right) then 1401b/sqin should be about right given atmospheric pressure is about 14 1b/sqin, or do I have it all wrong?

Thanks,

Mike

[Legacy777]

I don't think it should matter