R34 Gtr Fuel Pump Flow Rate

[sinistaGTR]

Can anyone tell me the flow rate of the stock R34 GTR fuel pump...tried searching the net and cant find a thing

[R31Nismoid]

I believe its quite close if not the same as the Nismo pump, given they have supported 380rwkw before.

although its anyone's guess after 10 years as most people have fuel pump issues once you get to the '10 year' or so with any skyline.

[sinistaGTR]

wow thanks, can def put the fuel pump to the side of the to do list

[R31Nismoid]

Well yes and no mate. For mild mods you should be totally fine...

However it always pays to get the car onto a dyno, check AFR's & fuel pressure just to be sure it is indeed all A-OK.

I mean it should be, but nothing is ever certain when dealing with 10yr+ old pumps. Often people change then just for piece of mind as Nismo pumps are only $300 or so

[paulr33]

good insurance policy i say, like ash said

if the pump fails its fine

the engine stalls no harm done

its only when the pump cant keep up

and leans the motor out, when shit goes bang

[sinistaGTR]

yeh im not going to be pushing anything big at the moment, more doing research in order of mods required. But cheers for the heads up will def keep it in mind

[choyda]

This link suggests the rates:

here

I got one anyway as its said, its one less thing to worry about. On that note though, its a bit of b1tch to install.

[Legionnaire]

Also nismo speclist here states Nismo fuel pump, flowing 4.6 l/min at 3 bar pressure, has 25% more flow than factory pump. This gives us a figure of 4.6/1.25 = 3.68 l/min, or 220.8 l/hour.

Edited March 31, 2011 by Legionnaire

[Beer Baron]

standard 34 GTR pump is no where near a nismo pump. nismo pumps are 276l/ph (same across 32/33/34). standard GTR pump are 195/lph (again same across 32/33/34). You can get a bit more out of them with a direct power feed as they flow a bit more at higher voltage but they are a long way from a nismo (flows 50% more).

[R31Nismoid]

If the GTR factory pump can make 380rwkw/20psi (Snowmans car did, everyone assumed aftermarket pump, which it turned out not to be).

It can't be flowing 195L/ph.

My point was it would most certainly appear that what is on the Japanese spec sheet is perhaps not what is going on in reality.

Someone have both handy? Would make for an interesting test!

[Ryan1200]

http://www.stealth316.com/2-fuelpumpguide.htm

Some data here on the standard GTR pump quite interesting..

[R31Nismoid]

^ Now that's the kinda shit I'm talking about.

70psi its flowing ~235L/hr. 40ltr/hr extra @ 70psi is hardly just a "bit more" via voltage

Clearly the Nissan OEM is spec'd down with ~250L/ph @ base pressure.