how much will a std fuel pump flow

[itbmils]

All

I have just completed a full rebuild of my R32 GTR (STILL running in)

I've just ordered a PFC + 550cc injectors + CAM wheels to 'finish' things off - but I was just wondering how much HP will the std GTR fuel pump flow

Will it provide enough for 300rwkw

Will it flow enough for the 550cc injectors (HKS)

What should I be upgrading to (if required)

[benm]

Quoted from this thread: http://www.skylinesaustralia.com/forums/sh...ight=fuel+pumps

Say hello to the Bosch 044.

*GTST pump is 135 litres per hour and supports 300 bhp at standard pressure

*GTR pump is 190 litres per hour and supports 420 bhp at standard pressure

*Bosch 910 pump is 200 litres per hour and supports 450 bhp at 73.5 PSI # 0 580 254 910

*Bosch 975 pump is 228 litres per hour and supports 500 bhp at 73.5 PSI # 0 580 254 975

*Bosch 984 pump is 228 litres per hour and supports 500 bhp at 73.5 PSI # 0 580 254 984

*Bosch 044 pump is 330 litres per hour and supports 730 bhp at 73.5 PSI # 0 580 254 044

*Bosch 040 pump is 235 litres per hour and supports 520 bhp at 73.5 PSI # 0 580 254 040

[T88 ON BOARD]

In my GTR R32 when it came from Japan...I made 330kw@4 wheels...

Then the pump maxed out....

[Sydneykid]

Quoted from this thread: http://www.skylinesaustralia.com/forums/sh...ight=fuel+pumps

Say hello to the Bosch 044.

Wow, I have been quoted again. :headspin:

A recent update......the GTST and GTR pump flows in my table quoted above are at 12 volts. By using a relay and dedicated wiring I have achieved 13.5 volts at the pump. This increases the flow, please refer to the following tests.........

The 300ZX pump is pretty much the same as an R32GTR pump.

Hope that helps:cheers:

[Zenith]

Im aware this is an old thread, but i reckon informative threads should never die.

SK, you increased the voltage to the fuel pump, so therefor its working harder, in turn are you decreasing its life.

Seems like a good idea, but i think it would probally be worth it to spend $400 or so on a new pump just in case.

Zenith

[pnblight]

Im aware this is an old thread, but i reckon informative threads should never die.

SK, you increased the voltage to the fuel pump, so therefor its working harder, in turn are you decreasing its life.  

Seems like a good idea, but i think it would probally be worth it to spend $400 or so on a new pump just in case.

Zenith

Zenith you release a running car doesn't operate at 12v as the battery would never charge most running cars operate at closer to 14 to 14.4v so if anything the rate on the pumps is low (and no it will not short the life as this is the voltage there designed for ).

And i'm running a std gtr pump on 700cc sard injectors at 529.4rwhp 20psi so i think fit quiet well with SK chart

Ps nice post SK

[Sydneykid]

Im aware this is an old thread, but i reckon informative threads should never die.

SK, you increased the voltage to the fuel pump, so therefor its working harder, in turn are you decreasing its life.  

Seems like a good idea, but i think it would probally be worth it to spend $400 or so on a new pump just in case.

Zenith

What PNB posted is spot on, the pumps are designed for 13.8 volts, they like that voltage and by only feeding them 12 volts they are underdone.

Worth $400? I don't know, what I do know is I tune my cars on the dyno with a fuel pressure guage connected. If the pump can't supply enough fuel then the pressure drops. Then and only then do I consider it time for a new pump.

[RS500]

Quoted from this thread: http://www.skylinesaustralia.com/forums/sh...ight=fuel+pumps

Say hello to the Bosch 044.

hi there,

given the table u have attached here, can you or may SK tell me what supply voltage was used as to obtain the mentioned results?

the reason i ask is that i have some information on the bosch motorsport pumps which i actually recieved directly from Bosch that indicate their flow capabilities to actually be less than what has been stated here earlier.

please refer to the table below (as per Bosch motorsport Components - Fuel pump technical data);

0 580 254 040 - 102 ltrs/hr @ 6.5 Bar

0 580 254 044 - 200 ltrs/hr @ 5 Bar

0 580 254 046 - 207 ltrs/hr @ 3 Bar

0 580 254 910 - 130 ltrs/hr @ 5 Bar

0 580 254 975 - 165 ltrs/hr @ 5 Bar

0 580 254 984 - 165 ltrs/hr @ 5 Bar

fyi, operating voltage = 12V.

[wolverine]

this appears to be correct RS500. (at least that is what the bosch site shows)

personally, i installed the 984 rather than the 040 for the extra headroom.

the 044 is a longer than the 984 and i presume is harder to fit in tank but for big HP there is no substitute.

[Zenith]

Thanks pnblight and Sk, i was just curious to find out if there was any consequenses.

I guess i'll keep the standard GTR pump and bump up its voltage.

Thanks that is a really handy peice of information.

Zenith

[pnblight]

Thanks pnblight and Sk, i was just curious to find out if there was any consequenses.  

I guess i'll keep the standard GTR pump and bump up its voltage.  

Thanks that is a really handy peice of information.

Zenith

Zenith i think you have miss understood what i said cos you can't bump up the voltage cos the pump you are running now will be operating on or around 14volts std . To see this for you self place a voltmeter cross the battery of you running car and it should show 13.8 to 14.4 volts and at rest(car not running) a good battery will hold ~12.8 volts ,so to test a fuel pump on 12volt supply is just silly as it is not what it will see in service on the car.

i hope this makes it a bit clearer

pete

[Sydneykid]

hi there,

given the table u have attached here, can you or may SK tell me what supply voltage was used as to obtain the mentioned results?

the reason i ask is that i have some information on the bosch motorsport pumps which i actually recieved directly from Bosch that indicate their flow capabilities to actually be less than what has been stated here earlier.  

please refer to the table below (as per Bosch motorsport Components - Fuel pump technical data);

0 580 254 040 - 102 ltrs/hr @ 6.5 Bar

0 580 254 044 - 200 ltrs/hr @ 5 Bar

0 580 254 046 - 207 ltrs/hr @ 3 Bar  

0 580 254 910 - 130 ltrs/hr @ 5 Bar

0 580 254 975 - 165 ltrs/hr @ 5 Bar

0 580 254 984 - 165 ltrs/hr @ 5 Bar

fyi, operating voltage = 12V.

My best suggestion is to ask Bosch, why their pumps exceed their ratings by such large amounts. I have coverd this question a number of times in previous posts. Please do a search if you need a more detailed explanation

Simply put, my understanding is that Bosch quoted flows are at 12 volts, at maximum pressure, over a long period of continuous operation and using a control liquid (not petrol).

The outputs I have posted are as tested, some personally (by me) and some by a reputable tester in the US. They are "real world results" and I see no reason why you wouldn't get the same results.

I have measured the voltages at the pumps on a number of Skylines, I have found voltages as low as 10.5 volts. This is with the engine running and a perfectly good battery and alternator. There is voltage drop in all wiring and a bad earth (or 2) can result in quite low voltages. Add a large drain pump and you have a recipe for less than satisfactory results.

An example, I have seen a Skyline with 2 X 044's running the standard wiring. I removed one of the 044's an rewired it with decent size wire, direct to the battery via a relay and the one left pumped more fuel than the 2 X 044's did before.