Hey guys, so im startting to gather everything for my turbo build, i have a 4.8 NNBS.. Im planning on 60# injectors, and for fuel pump, i bought an Aeromotive 340.. but i cant really find much info on this.. I read that nnbs have the module control that sends variable voltage.. please help me on what to do..

THANKS!

 

I'm subscribing to see what answers you get. I'll need to figure something out for mine also, about the same set up running e85 though.

 

Are you sure that you have a FPCM? Not every truck has it.

 

Hmm, news to me. Any quick ways to tell?

 

x2...

 

This little module I have mounted up on the aluminum brackets... In stock location, it will be under the bed in front of your spare tire next to the gas tank.

 

Is this the one? It was directly in front of the spare as you can see. Looked to be about the same size as the module you posted smokeshow.

 

Sub'd

 

okay im in your same shoes, did some research today. i called magnacharger, racetronix, and procharger and they all told me to stick with the stock fuel pump. you have to modify the basket to fit aftermarkets like walbro or aeromotive or you have to get the hotwire kit, and a pressure regulator for the aeromotive and would not reccomend it unless your going crazy boost. none of them are compatible with e-85 so if u want to do e-85 run a flex fuel trucks fuel pump. if not just run the OEM one. They built and seen GMT 900 with 4.8 and 5.3 pushing 15psi on stock pump with 600rwhp no issues. anyone care to chime in, if this is the case than im just sticking with the stocker

 

Yeah that's it.

You can run E-85 with a stock pump. I have pushed the stock NNBS pump and 60lb injectors over 600whp on gasoline, but pressure was dropping hard. You might get it to 550whp without dropping pressure. Just make sure your injector data is spot on if you plan on running the stock pump to high horsepower, because the tune relies on that if the pump can't hold pressure. I would recommend fuel system modifications over 600hp regardless.