I bought a Walbro 340 pump and kit awhile back from Racetronix. i have finally gotten it installed and was wanting some advice on something. I also have an inline NOS pump(#15763--46gph@40psi) installed. I have a supercharged 383 in my 95 Trans Am that is making close to 500rwhp on 6#s of boost and 42# injectors. Do you guys think I should just ditch the inline pump and go with the Walbro only? I am starting to run a little lean on the high end in 3rd gear. Basically , i guess I want to know if I will get more fuel with just the Walbro 340. Thanks, Roy

 

The single in-tank pump would be enough to support 500RWHP.
Depending on which pump NOS supplied you may or may not be able to leave it inline.

Is the NOS pump an Airtex T-Rex or a Walbro GSL392?

Jack
Racetronix