is that what I said? Chapter and verse please, lol.
More pressure is always better, until it's too much, for the available fuel to prevent detonation; irregardless of the size of the cam.
But with alloy heads, there comes a point when all that more pressure does, is smoke the tires more.
If all you can fit on your street car is 255s,then there is no point in striving for high pressure, for acceleration, in a streeter, cuz all it will do is spin the 255s to past the speed limit. Hi-pressure will still help with making her fuel stingy. So if you can control your right foot, it's still the way too go. And hi-pressure will still blast your car down the track after it stops spinning.
What I did for a while was run a small vacuum secondary carb during the week, and bigger DP on the weekend. That worked pretty good. But when I retired her from DD, the 750 stayed on .............. with predictable results on my bank account vis-a-vis tires,lol.
If you are running a 3000 or more TC, maybe even a 2800, then the striving for a high VP is somewhat misguided. That number is only a comparative tool to help understand performance below 3000rpm.
However your stall-rpm is highly dependent on your engine's torque, which the VP reflects. So if you have a low VP, that points to a situation with low pressure, and so your stall will be different than the same engine sporting a higher VP, which points to a higher pressure resulting from higher torque numbers.
I like to think of a hi VP number with a manual trans, as being akin to what a hi-stall TC is to an automatic. They both increase the launch . But unlike the convertor, in which once the rpm is past stall, the effect rapidly declines; whereas the hi VP never stops working for you. Well unless the pressure forces the engine into detonation, that is.
Another thing with an automatic, is that you can swap stall for VP. If you have a high VP you can getaway with less stall. But if your VP is low, she will need more stall.
This is really only important when the stall argues with the cruise
rpm. So if your gears dictate a 2000 rpm cruise, you might not want to run a 3000 TC, and the higher your VP is the less throttle you will need to cruise with at 2000, and so the assumption is that she will also burn less fuel.
But if your gears dictate a 3000 rpm cruise, then who cares about VP.
