Rising Rate FPR
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Joined: Mar 2001
Posts: 858
Likes: 1
From: San Francisco, CA
What exactly is the RRFPR? Where does it live under the hood? (or, does it live there? if not, what's there now that it would replace?). I know very little about the FD fuel system, so anyone with lots of experience on this is welcome to pipe up.
Looking for a S5 TII??
Joined: Feb 2002
Posts: 338
Likes: 0
From: Grand Junction, CO
A band-aid? I think of it as more a necessary part of a well designed system.
On my car, the RRFPR sits on the fuel return line. By adjusting the amount of fuel it lets through, seeing as how the fuel pump is pumping at a constant flow, you can set the base fuel pressure as seen by the fuel rails. When connected to a vacuum line, the RRFPR will raise and lower the fuel pressure during driving typically at a 1:1 ratio.
I don't know what the limitations of the stock FD fuel system are, but on my TII, it was around 220 rwhp. With a T04 upgrade on a TII it became necessary to remove the entire system and replace it with something that will flow more, in my case, an SX pump, filter, and regulator, 1600cc secondary injectors, and -10AN SS fuel lines. OK it is overkill but think long term so you only have to do it once...
~Jeremy
On my car, the RRFPR sits on the fuel return line. By adjusting the amount of fuel it lets through, seeing as how the fuel pump is pumping at a constant flow, you can set the base fuel pressure as seen by the fuel rails. When connected to a vacuum line, the RRFPR will raise and lower the fuel pressure during driving typically at a 1:1 ratio.
I don't know what the limitations of the stock FD fuel system are, but on my TII, it was around 220 rwhp. With a T04 upgrade on a TII it became necessary to remove the entire system and replace it with something that will flow more, in my case, an SX pump, filter, and regulator, 1600cc secondary injectors, and -10AN SS fuel lines. OK it is overkill but think long term so you only have to do it once...
~Jeremy
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Joined: Mar 2001
Posts: 761
Likes: 16
From: Walnut, CA
Originally posted by fast13b
A band-aid? I think of it as more a necessary part of a well designed system.
On my car, the RRFPR sits on the fuel return line. By adjusting the amount of fuel it lets through, seeing as how the fuel pump is pumping at a constant flow, you can set the base fuel pressure as seen by the fuel rails. When connected to a vacuum line, the RRFPR will raise and lower the fuel pressure during driving typically at a 1:1 ratio.
I don't know what the limitations of the stock FD fuel system are, but on my TII, it was around 220 rwhp. With a T04 upgrade on a TII it became necessary to remove the entire system and replace it with something that will flow more, in my case, an SX pump, filter, and regulator, 1600cc secondary injectors, and -10AN SS fuel lines. OK it is overkill but think long term so you only have to do it once...
~Jeremy
A band-aid? I think of it as more a necessary part of a well designed system.
On my car, the RRFPR sits on the fuel return line. By adjusting the amount of fuel it lets through, seeing as how the fuel pump is pumping at a constant flow, you can set the base fuel pressure as seen by the fuel rails. When connected to a vacuum line, the RRFPR will raise and lower the fuel pressure during driving typically at a 1:1 ratio.
I don't know what the limitations of the stock FD fuel system are, but on my TII, it was around 220 rwhp. With a T04 upgrade on a TII it became necessary to remove the entire system and replace it with something that will flow more, in my case, an SX pump, filter, and regulator, 1600cc secondary injectors, and -10AN SS fuel lines. OK it is overkill but think long term so you only have to do it once...
~Jeremy
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