I am getting ready to put a powerdyne on my 06 Denali with 42lb injectors. Will the stock fuel pump keep up with it or do I need to add an auxillary pump or replace the stocker. I will only be pushing about 6psi, so it isnt going to be anything much.
Thanks
Stevie

 

You will prob be ok at just 6 psi.. I would install a fp gauge.... Or you can run a walbro 255 inline, call it a day and def have enough fuel..

 

I think my truck was around 420ish rwhp. stock pump although it would drop like 6psi at WOT. im a 4.8 tho....

 

Your truck still returnless? I experienced that same prob when I was still returnless and I was using a single walbro 255

 

Cool, I dont think I will be anywhere in that neighborhood, so I should be fine.