Can somebody respond to my question of the benefits of square jetting/blocking the PV in terms of throttle response/consistency for a 3000 rpm/stutter 2-step launch on a 5000 stall converter. Am I likely to see any real difference (60' et improvement) since I'm essentially shooting off the rear pump shot anyway? I mean it seems logical to me (take the potential PV "flutter" out of the equation and truly equalize the A/F ratio from F/R) but want to get my head around the real reasoning or something I'm not considering. I know it's easy enough to try but before I do I want to hear other opinions....thanks!
The 1000HP 4150 carb was originally on a 508" street driven Big block where the PV was beneficial for cruising.
As I stated, I got a stronger signal and instantly better idle and throttle response, almost like it had a small vacuum leak, but I never found one and yet I checked many times. I do not trust the PV delivers fuel evenly with a nasty cam. With a street car, its probably a lot better, but when you have real duration and a real lack of vacuum signal I think its best to get rid of it. I have the best idle on this thing and yet my duration at 50 is over 300......
I run this carb on my 512 and the jetting and air bleeds posted above flat out works. I trap 110-111mph in the 1/8th with this thing. The way he sent it did not. And it took a while to sort it out, but its about as good as I think it will get and I want to focus on the SV1 a little.
