I have a 2008 tahoe which I believe has a returnless style fuel system. I am running 12 pounds of boost with 75lb injectors from FIC. I am spraying meth, but not using it as a fuel supplement. My pressure is holding just fine even at 12 pounds with a completely stock fuel system minus injectors. Keep in mind this was not a flex fuel truck. I saw a thread in this section where a company was releasing drop in kits for the NNBS, but can't seem to get any information about when they will be available.

I'm wanting to turn the boost up, so I obviously will need some more fuel for it. What are my options? I really don't like the price of a full blown custom setup, but even if I did how would I wire it in with the variable frequency stuff?

Just need some ideas guys, someone with a NNBS that has been down this road and upgraded would be helpful.

Thanks

 

The squash pumps are a drop in pump but the fpcm cannot control it so it will need to be turned off in the tune and you will need to run a return line.

 

I'll be testing my new fuel system in the next few weeks and I plan on posting how it works out. It is the factory pump and FPCM running like stock with a Walbro inline 255 ran off a 4psi pressure switch plumbed into the factory pumps feed. Not sure if it will do what I want as of now, but I dont see a reason it shouldnt.