I am currently tuned via KPRO and running on 93.

I am going to be adding a bosch inline fuel pump, wideband o2, and fuel pressure regulator so that I can make some more power on e85.

At what point do I need my map changed/will my car not run normally? Can the bosch inline pump and fpr be installed and then just set to stock fuel pressure? Then when I'm at the tuner the fuel pressure can be increased?

Also, does one wideband work better than others for e85 and 93?

Thanks!

 

Yea, the added pump and FPR won't affect the tune, as long as the fpr is set to the same pressure as before.

Only issue I'd see is if your return is inadequate and can't return the fuel and your fuel pressure would spike.

Not sure if thats an issue w/these cars though.

 

Return?

 

Fuel return line

 

The return fuel line works fine for the SC guys running a variable rate FPR. I don't see why it wouldn't work here as well.

 

You should also tap your fuel rail and place a pressure guage on there as well. I will be doing the same setup as you in the spring.

 

Don't some adjustable fprs come with that already in mind? Ie, already have a spot.to tie in a gauge? Or I can just t from one of the lines?

 

Just put a gauge on the FPR if it supplies a port. Depending on what injectors and power you plan on running will determine what your base fuel pressure will be set at. For pump gas you can set it at 50 and be fine for whatever power pump will make but for E85 at 50psi base you'll probably only make around 450whp granted you are using 1000cc injectors. Take into consideration the limits of certain FPR's. If you have ID1000's and want to crank the pressure up to 100psi, you can only do with with a Weldon or FuelLab regulator: both which require an aftermarket rail and lines. People have fab'd the stock rail for some crazy setups but its more of a pain if anything.

 

I thought.some.of the aem fprs were good to 125ish psi? Hoping I can keep stock fuel rail and lines

 

Doubt it.