Compression on GP1200

Hey, Does anyone know what the compression should be on a GP1200?

Quite low like 130-135 psi if its like a 66E (gp800) Try a serch on Green hulk.com or pwctoday.com do a search on the forum. ????

I am no expert but from what I understand a stock gp1200 should be around 130. Mine is running at around 120 -125.
It is important that the readings are all within 15% of each other.

Arnt compression readings ment to be within 5% of each other?

Some motors (like a stock 760) have staggered compression from factory, so could be a fair % different anyway.

Also compression gauges vary quite a bit between different brands. i.e. one mite read 150psi , where as a different brand gauge mite read 140psi on the exact same cylinder.

i know on the gp800 (66e) that compression is 120psi , im just getting my head machined on mine to bump it up to 150/160 . i know the cylinders are interchangeable with the 1200 but they might run a slightly higher compression head but it wouldn't be much