I just got my car back after trying to spray a 150 shot, I make 401rwhp on motor. I have a walbro 255 and everything else is stock, it ended up running lean. The shop said I need a better fuel pump, so I ordered a Racetronix kit. I was almost posotive the walbro would have been enough but turns out i was wrong. Is there anything else I need to do to ensure I have enough fuel for the 150 jets? They mentioned installing a better fuel filter as well.

 

stock everything except a lid I made 446/509 whp/wtq.

You don't always have to upgrade something, but sometimes you do.

 

that doesnt make sense to me i made 382rwhp through an auto on a mustang dyno. i sprayed a 150 shot and it went dead rich but made 498rwhp. all i have is a 255lph fuel pump

 

Every car is different. I have seen one car with a stock fuel pump that could support X amount of Horse power and then the next car come no where close to that. This is why I say never go buy what someone elses car did with out checking fuel pressure.

The stock fuel pump can safely support up to 450 hp. A walboro can support up to about 500 hp and a racetronix kit can support up to about 650 rear hp.

I hope this helps..
Dave

 

injectors would be a pretty good investment aswell...

 

That would explain why, I was running well over 500rwhp.

 

SVO 30# injectors, billet fuel rails, racetronix kit is what is on it's way in the mail.

 

The Racetronics kit for the vettes is just a repackaged Walbro, now the f-bods? the kit does include the hot wire kit, which will up the performance a certain percent, like upto 15%. Also, a return and reg at the rails can really help.
Robert

 

walbro 255 intank & NOS boost a pump running the motor
Nitrous Outlet Dedicated fuel system for the nitrous