I am wondering if anyone has done this. I have and i am trying to do a 75 shot, but it is hard to find which fuel jet to use. The separate fuel system consists of a one gallon cell filled it c16 gas with a holley blue pump and -6 hose ran all the way to the zex box. what size fuel jet do i need?

 

Zex recommends a 38 jet nitrous and 32 jet for fuel for a 75hp shot.

You can go to their website and download the instructions manual which should also tell you.

 

No no, i am useing a separte fuel system. i am not tapping off of the fuel rail. this system has its own fuel pump and cell fill with c16. the difference is that it is not under alot of pressure. like the L normal fuel system. i am useing a holley blue to pump the fuel at 7psi to the box.

 

Ok, I would have no clue other than to refer to a N20 kit for a carb setup.

The last stand alone fuel setup I did for a N20 car, I used a Holley Fuel injection pump and a Holley regulator set around 50psi.

 

The Holley Blue pump is for carburated motors unless they have a new one for efi cars.

 

I know the holley blue is for carb cars. but it does not make a difference when it has it own tank and stand alone system.

 

You probably need to get a different spring for the fuel pressure regulator to increase pressure. Most of the stand alone fuel systems come with two springs that give you the option of running low or high pressure. That may be the fix for you. If not, maybe look at getting a different pump.