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Old 03-28-2004, 03:36 PM   #1
THAWA
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Member#: 44581
Join Date: Oct 2003
Chapter/Region: BAIC
Location: Nor-Cal Ghetto Garage
Vehicle:
3 Boxers 2 AWD
3 turbo 1 6cyl & a 13BT

Default Cheap RRFPR

I saw on a dunebuggy site someone was using an MSD-2222 as a rrfpr. The MSD-2220 is an adjustable fpr which is nothing more than the fpr available on some old vw's and porches manufactured by bosch and rebranded as the MSD-2220 with an adjustable screw. The 2222 adds a nipple where the screw is and uses boost pressure to vary fuel pressure. In essence a rrfpr. My question is though, does anyone know what ratio the 2222 runs? It's only like 50-60 dollars, or you can get a jy unit for a couple bucks, and slap in the nipple and have a working rrfpr.

So yeah if anyone has tried this what did you think about it, or if anyone can find more info like the ratio or whatever please post that aswell.
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Old 03-29-2004, 12:22 PM   #2
Drac9
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Location: Colorado Springs, CO
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1999 2.35 RS-T w/NOS
Hybrid Rally Blue Pearl

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Here's the answer from Scott @ Overboost
Quote:
The MSD #2222 regulator is a 1:1 regulator (1 PSI of fuel for 1 PSI of boost). Pressure adjustment will depend on which pump you use, but for most fuel injected vehicles it's adjustable from 36 PSIG to 45 PSIG @ atmospheric. It is not the 12:1 "FMU" required by most turbo systems.
I guess the adj. is for base pressure only.
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Old 03-29-2004, 01:18 PM   #3
THAWA
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3 Boxers 2 AWD
3 turbo 1 6cyl & a 13BT

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hmm, lame
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Old 03-29-2004, 01:47 PM   #4
8Complex

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04 FXT (red)

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12:1??? Holy crap!! I believe the best setting for a RS-T is 6-7:1.
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Old 03-29-2004, 02:21 PM   #5
Drac9
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1999 2.35 RS-T w/NOS
Hybrid Rally Blue Pearl

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Yeah, mine was a 6:1 plate I believe. But the rest of the information still stands. I believe that the 12:1 was in reference to a different car.
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Old 03-30-2004, 09:54 AM   #6
ForesterPerformance
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BRP STi Version 3
Type RA V-Ltd RHD

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12:1 is what comes in the Ludespeed kit for the Subaru and is what I have on my car... (It is also what comes in the GReddy kit for the Miata, which is what I have on my other car...)
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Old 03-30-2004, 05:42 PM   #7
8Complex

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IIRC, the Ludespeed kits came with adjustable RRFPR's that did 2:1 all the way to 11:1. At least that is what they had when I bought my kit. *shrug*
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