Originally posted by sawking
Hello there, I'm racing a 3/4 Ton pickup with 4:10 gears, with a slightly higher stall than factory. I have a stock 454 with a performer intake and peanut port heads. Right now I using a 700 double pumper on it. It seems to be a really finicky carb. Some days it takes off hard and some days in stubles. I thought it was too rich cause it was doing it on hot days. But this past weekend it was cool and it did it a little worse. By the time it gets done stubleing the other pickup is a half a length ahead of me. I don't really want to buy another carb. I don't have much experience with carbs. But are all double pumpers this touchy. I was thinking of just getting a vacuum secondary. But I don't know if they will be any better. I need the power right out of the hole thats why I would like to stay with the double pumper if I could get it to work right all the time. Any advice is appreciated.
eliminate the rear pump and see what it does.