I have a 383 LT1 that is pushing 400-450 rwhp... I am installing a tnt wet kit and am going to shoot a 200hp shot....will a holley intank 255 or walbro 255 fuel pump with 36lb injectors be enough?

 

I have 30lb injectors and T-rex fuel pump and mine works fine. No problems at all. Plus being a wet kit helps you on the fuel issue! Good Luck! Numbers in Sig!

 

We built a 02 Z06 with blower, cam, lt's, bolts ons made over 600 rwhp, it was a Racetronix intank and 42 lb Lucas injectors. It made 617 rwhp without a hint of running out of fuel. (BTW.....Racetronix are the best fuel pump setups Ive yet to see, and I see quite a few, it comes with EVERYTHING you need and then some and not too bad an install). Im gonna go with 30 lb SVOs and either a Racetronix intank or KB inline (have several reasons I am debating this one), to spray a 200 shot.

 

You are on the right track with the injectors and pump. i would also get a hot wire kit and possibly a pump booster to insure that you have enough fuel.

 

The walbro 255 will work.

 

I'm making about 725 RWHP, I've got a walbro 340 255 ltr/ph intank pump, a Aeromotive Tsunami external pump and 40LB SVO injectors and no fuel problems.

 

I put down 700 at the wheels, also with a 383. I run an Aeromotive 1000hp pump, size 10AN fuel line, with 55lb injectors. When I hit the nitrous I still see a small drop in fuel pressure (1-2psi)

 

Acutally, when my 150 wet shot kicks in, I see an 8 lb. drop in fuel pressure, from 60 to 52, with the 255 pump, but it immediately recovers back to 60.

 

one more vote for the 255lph. ;D worked for me.