FUEL RAIL CROSS-OVER (FRx) INSTALL - Ford Powerstroke Diesel Forum
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Old 02-23-2012, 08:56 AM
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FUEL RAIL CROSS-OVER (FRx) INSTALL

Whats happening gents:

Tomorrow I will install the Riffraff Diesel Fuel Rail Cross-over kit on my E99 in attempt to get rid of dead head and engine cackle.

The kit comes with three different springs to insert into the fuel pressure regulator. Silver=58-61 psi, Gold=62-65 psi, Black=67-70 PSI.

Does anyone know what the stock fuel pressure may be at this point of the fuel system? I don't have a gauge to read it before I begin the install.

Any advice will help.

Thanks in advance!

-7PO1NT3
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Old 02-23-2012, 12:40 PM
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Seriously guys? No love or what?

Or does just no one know what fuel pressure we are getting out of these 7.3's stock?
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Old 02-23-2012, 12:48 PM
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1999 models have 47-55 psi according to my Haynes manual.
Start with the silver spring as that would most match "stock"
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Old 02-23-2012, 01:00 PM
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The more I think about it that is probably for E99 models.
The book says 2000-2003 7.3 is 40-60 psi.
Either way the first spring is stock.

Last edited by EasyRhin0; 02-23-2012 at 01:00 PM. Reason: typo
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Old 02-23-2012, 01:02 PM
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Quote:
Originally Posted by EasyRhin0 View Post
The more I think about it that is probably for E99 models.
The book says 2000-2003 7.3 is 40-60 psi.
Either way the first spring is stock.
Awesome, thanks Dave. Appreciate your input! I've got the E99 so looks like I run a little higher. Ill be sure to post results!
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Old 02-23-2012, 01:22 PM
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who likes stock though??
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Old 02-23-2012, 01:25 PM
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Originally Posted by 7.3550Duty View Post
who likes stock though??
Good call bud, I'll try all 3 springs since its no big deal to change em. Once I figure out which one is better suited for the job I'll let you guys know!
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Old 02-23-2012, 01:32 PM
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Well i know when you install a RR on the newer 7.3s, you set your regulator at around i think it is 70 or just alil less, just kinda gotta play with it but thats what i have been reading.
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Old 02-23-2012, 02:26 PM
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I went with the black one when I installed mine. Didn't see a reason not to.
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Old 02-23-2012, 04:36 PM
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Us early birds need to grind a little on the uppipe to get the fittings to fit on the left bank by the return test port to fit the FRX. Directions can be found on Riffraff's website. It's not rocket science, just need a little patience and a dremel tool! Or a small air grinder.
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frx, fuel pressure, fuel pressure spring

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