huh? 4Bar fuel pump and 5bar FPR?? how?

673 Views 4 Replies 3 Participants Last post by jcorallo, Nov 24, 2001

jcorallo

Discussion Starter · Nov 24, 2001

I have a 1993 VR6 with the z-eng SC kit.
My standard in-tank fuel pump is a 4bar, and I have a 5bar FPR that came with the SC kit, does that mean that no fuel will ever go back down the fuel rail return line????

Anyone?
Cheers,
Jules

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alteregovw

· #2 · Nov 24, 2001

Re: huh? 4Bar fuel pump and 5bar FPR?? how? (jcorallo)

So how come you need a 5bar fpr for your z-charger and my kit came with a 4-bar..... I'm lean or your really rich...

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krautburner

· #3 · Nov 24, 2001

Re: huh? 4Bar fuel pump and 5bar FPR?? how? (jcorallo)

quote:[HR][/HR]I have a 1993 VR6 with the z-eng SC kit.
My standard in-tank fuel pump is a 4bar, and I have a 5bar FPR that came with the SC kit, does that mean that no fuel will ever go back down the fuel rail return line????

Anyone?
Cheers,
Jules[HR][/HR]

yer stock pump is capable of way more than 4 bar. if u have a gauge installed, pinch yer return line off and whatch the gauge reach 100 psi. or more. there is still fuel going back to yer tank just probably not as much.

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jcorallo

Discussion Starter · #4 · Nov 24, 2001

Re: huh? 4Bar fuel pump and 5bar FPR?? how? (krautburner)

think i understand now...
so the 'bar rate' of a fuel pump is the pressure at wheich it will deliver a set quantity of fuel right? eg: X Litres/min @ Y bar

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jcorallo

Discussion Starter · #5 · Nov 24, 2001

Re: huh? 4Bar fuel pump and 5bar FPR?? how? (alteregovw)

quote:[HR][/HR]So how come you need a 5bar fpr for your z-charger and my kit came with a 4-bar..... I'm lean or your really rich...[HR][/HR]

early (93) vr6's came with the 4 bar pump. Post 93 (94-) used a 3 bar AFAIK.

[Modified by jcorallo, 3:24 PM 11-24-2001]

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