3.3 EFI w 3.2 intake/Adding Fuel Pressure Regulator question

[briankeithsmith]

Gang: Does anyone have any good pics of how you added an aftermarket fuel pressure regulator to your 3.2 intake. Did you just replace all of the lines with stainless braid/AN stuff? I also want to add a T fitting for an electric sending unit so that I can run a fuel pressure gauge in the cockpit. Any pics you guys have are appreciated. Also if you happen to know the metric sizes of the fittings on the 3.2, that's helpful too. I'd like to know: 1. Metric to AN fitting sizes you used 2. Which aftermarket regulator you used 3. Anything specific that you had to modify Brian

[hobieboy]

Brian,
There is a test port on the 3.2 fuel rails - left rear corner of the rail (closest to cylinder 1). Factory puts a ball inside then a cap.

I plan to screw my sensor in there, then run the electrical wires back to the ECU. From memory, its M14x1.0. I got a M14<->NPT adapter from a local hydraulic shop.

Saw your thread on Rennlist - are you sure its the FPR?

[jbrinkley]

there's lots of stuff here, carrera fuel line, (BAT and AN fittings)
but that sorta depends on the rails, damper, fpr, filter, and which lines you have comming up from the tank/pump.
quick answer is stock 3.2 rails, damper and fpr and filter top are m16x1.5 to dash whatever size hose you intend to use.
if your talking about a rising rate regulator I have done this

you can see the E sender at the right side

[briankeithsmith]

Thanks for the replies guys.
Hobie: No, not sure its the FPR - sort of planning ahead just in case

Jerry - thanks. that thread you gave has some good info!

Brian

[briankeithsmith]

Jerry, did you keep your stock FPR?
or did you gou with an aftermarket unit? If aftermarket, which one?

[jbrinkley]

I have stock FPR and this FMU inline on the return to the tank
http://www.bellengineering.net/Pages/products_FPR.html

model 2027 half way down the page

[briankeithsmith]

Jerry:

So wouldn't that model 2027 totally replace the need for the stock FPR?

Can you explain?

Brian

[jbrinkley]

its a piggyback controller, so it works in tandem with the stock one. bell has stand alone FMUs also, but for me, it would be more work to go to a stand alone model. More hose make up and bracket stuff.
on that link it talks about the differences, I would think you would be looking at a MR model, (what's wrong with the stock 930 FPR?)

[briankeithsmith]

Well, I don't know that anything is wrong with my stock one. Like I said, planning ahead. I'm just trying to figure out how you've got the stock one hooked up, and this 2nd one hooked up, and which one actually drives the Fuel Pressure?

I've seen that FPR before on the Bell site. Looks like a nice unit, and one that'd be worth the money.

Brian

[jbrinkley]

on a 3.2 fuel comes from the pump to the bottom of the filter,
top of filter to the front of bothe rails,
end of one rail is stock FPR,
end of other rail stock damper,
at the bottom of the stock FPR is the return, excess line that normally connects to the return line to the tank,
#2027 FMU intercepts there, to the in port on the FMU,
the out port on the FMU connects to the soft/hard line to the tank
the fmu just blocks off the return line at a rate relative to the boost signal the fmu receives from a port under the butterfly on the TB.
don't know if that helps you. depends on what you got going on as far as how much 3.2 stuff you're using.

[briankeithsmith]

That makes sense.
I see what you are doing now.

I'm using a stock 3.2 setup, only thing different is my injectors.

So Basically the Bell FPR sits between the stock FPR and the return line, probably preventing fuel from going to the return, thus causing added pressure, if needed based on boost.

Brian

[jbrinkley]

yes, except it sits after the stock fpr but before the return to tank

[briankeithsmith]

exactly. The Stock FPR is the one that sits near cylinder #6, correct? Or am I confusing that on with the Damper.

thanks Jeff! Big help today man!

Brian

[jbrinkley]

damper on pass side
fpr on driver side

[briankeithsmith]

thanks again.

[briankeithsmith]

Well, tonight I think I may have found the problem. 0 volts going to the rear pump.

When I turn on the power on my car, the fuel pumps run for 20 seconds. It sounded like the rear pump was working, I just figured it was maybe dying. Turns out, it wasn't running, what I must've heard was the sound of it spinning as the front pump pushed fluid through it.

Ran a new wire to it tonight, we'll see what happens tomorrow.

Brian