Holley/Demon Carb stumble

BTW, if you go to the fuel and air systems forum, you'll see a thread started by 12many. It's called the definitive power valve opening or something. It's at or near the top of the forum.

12 did some really good testing on PV openings and his A/F ratio and jetting. A couple of other guys have also added some good info in there too.

It's worth the read.