hey tech read you blurb on crank comp,reason why is that i did a comp test on my 500 caddy engine before pulling it to swap over comp was high 155 to 165 and hit hard 1st pump was 120 to 140 .
i fiddled with the timing and got the thing to run good but anything really over 8 to 9 deg advance the thing wanted to ping on reguler. never had a high comp engine before but i am thinking this thing has some squish.

how much can be told if high comp or not by compression test ??
i would assume cam overlap/duration would also affect this.