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VR-4 Fuel Pump - Should I go with an adjustable FPR?


Proven Member
Apr 1, 2004
Lexington, Massachusetts
I grabbed a stock VR-4 fuel pump off of my friend's car since he upgraded, planning on putting it in soon. Right now I'm running the stock turbo/injectors and DSMLink, with a EVO III Big 16G/650sin the near future. I know its always better to have an adjustable FPR than not, but for my purposes, with a rewired stock VR-4 pump, do you think it's worth it?

Flow rate for reference (off of RRE's site):
180 lph @43psi @12v



Proven Member
May 15, 2005
St. Paul, Minnesota
I doubt it, because most people running the 190lph pump are not running a fpr. I don't think you'll have to worry about aver-running.


Proven Member
Mar 9, 2002
Actually the VR4 pump outflows the Walbro 190*, but still, you won't need an AFPR for it. I ran it for about a year with no problems and only recently got an AFPR.

* VR4 pump at 12 volts is 180 lph, while Walbro at 12.5 volts is 168 lph if you look at those RRE pages closely. The "190" rating comes at 14 volts, which your pump will probably never see.
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