Difference between an FMU and FPR????
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Joined: Oct 2002
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From: College Park, MD
Difference between an FMU and FPR????
What's the difference and purpose for these two when it comes to turboed cars. Do they go hand in hand or is one serve the same purpose better than the other?? Thanks for any of those whom reply
Re: Difference between an FMU and FPR???? (superduperman)
What's in a name?
An FPR normally refers to an adjustable fuel pressure regulator.
An FMU normally refers to a boost dependent fuel pressure regulator.
An FPR normally refers to an adjustable fuel pressure regulator.
An FMU normally refers to a boost dependent fuel pressure regulator.
Joined: Apr 2001
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From: Northwest Tri Cities Kennewick, WA, USA
Re: Difference between an FMU and FPR???? (Hatchblack)
An FMU raises fuel pressure based on boost, for example a 12:1 fmu would raise fuel pressure 12psi for every 1 psi of boost, that way the fuel pressure is only risen while boosting.
A fuel pressure regulator adjusts the fuel pressure at idle, and driving around, all throughout the rpm range, just not dependent on boost. Of course as manifold vacuum decreases the fuel pressure rises.
A fuel pressure regulator adjusts the fuel pressure at idle, and driving around, all throughout the rpm range, just not dependent on boost. Of course as manifold vacuum decreases the fuel pressure rises.
Thread Starter
Joined: Oct 2002
Posts: 150
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From: College Park, MD
Re: Difference between an FMU and FPR???? (Hondaddict)
THanks for the replys everyone. But i was more curious to know, which one do I use to adjust my fuel pressure at a certain boost. Let it be for driving or at idle. Thanks.
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