Adjustable FPR

Post by **Legacy777** » Thu Jul 14, 2005 3:10 am

I've searched around on here, and a tad on nasioc. Aeromotive seems to be the "shit" type adj. fpr, but I wanted to see if anyone else has any suggestions.

vrg3 · Post by **vrg3** » Sun Jul 17, 2005 6:33 am

The OEM FPR used on certain cars with Bosch D-Jetronic EFI systems is adjustable from the factory. But, it's atmosphere-referenced, not manifold-referenced.

It's not hard, however, to modify it to make it manifold-referenced. You basically turn the adjustment screw into an air channel (like a banjo bolt, sort of) and attach a pressure port to the end. MSD does it and sells it as their part number 2222, which Summit Racing sells for 60 bucks:

http://store.summitracing.com/default.a ... MSD%2D2222

Dune-Buggy.com has instructions for doing it yourself:

http://www.dune-buggy.com/turbo/fuelsystem.htm

The Bosch regulator's inlet and outlet nipples fit our stock hoses well.

Post by **Legacy777** » Wed Jul 20, 2005 3:17 am

So if I bought the MSD one, I would not have to modify anything, correct?

I'll take a look at the dune buggy page.

thanks

vrg3 · Post by **vrg3** » Wed Jul 20, 2005 4:02 am

Yes, I believe that is correct. You wouldn't even have to remove your stock FPR if you just wanted to raise fuel pressure; you could just stick the MSD one in the return line.

Hm, but I just realized -- that maximum pressure setting on that FPR is only 45 psi, which isn't very high.

NICO · Post by **NICO** » Wed Jul 20, 2005 4:36 am

vrg3 that fpr wont fit in the stock rials at all, its to small.

vrg3 · Post by **vrg3** » Wed Jul 20, 2005 5:00 am

It'll fit the stock hoses, not the rail.

Post by **Legacy777** » Wed Jul 20, 2005 5:34 am

I'm completely redoing the fuel lines. Going to do the parallel fuel mod. I will be removing the stock regulator completely, and will be using two driver's side rails.

JasonGrahn · Post by **JasonGrahn** » Wed Jul 20, 2005 3:55 pm

aeromotive is the shit. also has dual inlets for those running that parallel fuel mod.

Post by **Legacy777** » Thu Jul 21, 2005 1:38 am

dual inlets from the tank, or dual outlets to the lines?

vrg3 · Post by **vrg3** » Thu Jul 21, 2005 1:42 am

FPRs have inlets from the rail(s) and outlets to the tank(s).

Post by **Legacy777** » Tue Aug 09, 2005 2:57 am

I've decided not to bother with the series to parallel mod right now.

I talked with Dale at Teague's for a little bit this morning, and from his experience they haven't really run across fuel starvation, assuming you have a good pump like the walbro.

I may revisit it when I put bigger injectors & a larger turbo on, but for now, I'll just save the hassle.

NICO · Post by **NICO** » Tue Aug 09, 2005 9:30 am

i would not even think of changeing them, perfect made.

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Adjustable FPR

Adjustable FPR