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Old 06-13-2013, 09:08 AM
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Hpx ... Frx

Are the HPX & FRX from rif raff worth the money or should I go a diff route ?

Also any other small mods I should consider such as 180* thermostat.

FRX
http://www.riffraffdiesel.com/category/F731-FS-RR.html
HPX
http://www.riffraffdiesel.com/catego...1-RDP-HPX.html


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Old 06-13-2013, 09:13 AM
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I have the frx. The only power gains were probably from the new stronger spring but the real gain to me was noing that i got rid of the dead head.
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Old 06-13-2013, 09:39 AM
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smoother idle is what im after.
and knowing im keep good fuel pressure at WOT.

the Frx is gonna be my next mod for sure.
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Old 06-13-2013, 10:31 AM
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U guys running a fuel pressure gauge or any other fuel mods


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Old 06-13-2013, 11:15 AM
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Quote:
Originally Posted by Z-STROKE View Post
Are the HPX & FRX from rif raff worth the money or should I go a diff route ?

Also any other small mods I should consider such as 180* thermostat.

FRX
Riffraff Diesel Performance Parts: Diesel Regulated Return | Powerstroke Regulated Return | Ford Diesel Regulated Returns - Regulated Return System
HPX
Riffraff Diesel Performance Parts: - HPX


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Unless you plan on running huge horsepower I would not bother with the 180* T stat. On the other end of the spectrum I have the 203 T-stat and the only difference I noticed from it was crappier AC in the summer (I have added a ball valve to mitigate that) so I would save the scratch on that too.

I have the HPX and the truck is a little smoother, cold starts where a little better and it is slightly quieter so for 45 bucks it is worth it.

If you plan on keeping factory injectors or go to small performance injectors then it is worth it. Plan on going big then just save up and do a RR. I would recommend doing the pre-pump mods as well and if you are going to mess with fuel pressure you should really have a fuel pressure gauge.
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