caustin69

I have a 347 with Gt40 xp alum heads, x303 cam, gt40 upper and lower, 76mm c&l maf, 75mm tb, vortech with 9psi, 48lb inj.....took to tuner with mustang dyno on Saturday to have tuned....ended up with 430rwhp and tuner guy says that I am out of injector????? he suggested 60# injectors and a 90 mm maf. I thought 48lb would be plenty of injector. any help would be greatly appreciated.

AdderMk2

i can see that.... a 302 with 10 psi of boost uses 42# injectors...

your maf is way too small though

Blown408

You are breathing a little better than most. You have a real nice setup there. It just depends on what you want to do. You should be able to tweak a little more out of that with a bigger maf! What is choking you really is the intake. Get a better flowing intake and if you put smaller pulleys on it then you will need bigger injectors! 48 pounders should be efficient enough for you for the set up that you currently have!