you should have around 38psi idle and i had originaly bought 24lb injectors then read some more and bought 30s i still have a set of 24s lol what computer are you running and was your car a stock mass air car
I had 38psi while running my 302 setup, and ran the 351w there for a few days. I bumped the pressure up to 40psi and some of the bucking went away, but not all.
I remember reading something like 19's were good till 300 horse, and 24's were good till 350 horse. So i went with them, now that i look back i see mixed inputs on a good 351w size injector, half say 30-36, and others say 24's are good to this horsepower.
I'm running a A9L, or A9P computer (i cant remember). My car is a stock mass air car, no conversion or anything.
I didn't have the bucking issue with my old 302 setup, so its something ive changed or tried to.