The most common mistake people make with Holley carbs is that they change the jets to control air fuel ratio at WOT. As Dave points out, the PVCR is what should control the "extra" fuel for WOT. It takes more work to do it right, but you end up with a better carb when you do it right.
With a DP carb you can also set up the secondary side to be richer since it usually isn't kicking in for freeway cruise anyway.
Yea but you cant do that if you block off the power valve's. For racing I prefer to block off the power valves. Ron
