SPEED_NYC

iTrader: (3)

ok, i need some help deciding on a fuel pump. i already have a weldon 2015, but i'm hesitant to put it on my car because of the noise. i'm looking for a pump that can safely and reliably support 550rwhp without making me have to wear ear plugs. the pump also has to be good for long distance driving and opperation in trafic without overheating. are the aeromotive 1000 just as loud as my weldon, or are they quieter. what about running 2 big bosch external pumps? i know the bosch are quiet, and i know of a few 500 hp guys running twin external bosch pumps, but i'm not sure on the part #'s. what do yu recomend? if the bosch are quieter than the aeromotive, and they will support the power, can anybody give me part #'s and price estimates on them? thanx alot

I'm gonna be making a pump buying decision in about 5 hours, anybody that can offer some help, please do, quickly
THANX!

btw, anybody wanna buy a weldon pump with about 8 months useage on it? make me an offer.

13BAce

This is the Bosch pump:

You can get it for $170 from http://www.precisionte.com/cgi-local...105773.4468418 .

setzep

I just bought that same bosch pump as the one in the pic but mines all alluminum, no black on it. Anyone have an idea how much hp it's good for? The guy I got it from said it was good to 580hp but I don't know.

13BAce

Yeah, the one I bought was silver too. It's good for somewhere in the 500 HP neighborhood. I remember seeing an FD with that pump and a T-78.

SPEED_NYC

iTrader: (3)

thats the pump i was thinking about. two of those should safely support 550rwhp right?

how does that work anyway? i know 2 pumps dont give you twice the flow at a given pressure, how do i calculate what flow i will get at a given pressure when running 2 pumps in paralel?
thanx

btw is that the pump you are running Jim?

maxcooper

Don't trust "HP" ratings for fuel pumps. They are almost always for piston engines (that use less fuel for the same HP) and there is rarely an indication of what fuel pressure was used for the test. A pump might support 1000 HP on a low-pressure carb system with a really efficient engine, and only support 150 HP on a fuel injected turbo rotary. Fuel pump performance is more complicated than a simple HP rating can describe.

I've got a web page to help you determine what kind of flow you will need at what pressure:
http://www.maxcooper.com/rx7/how-to/...tem/calcs.html

And I also had my SR Ultimate (A'PEXi BNR-32) pump tested at RC Engineering. I am not sure if the voltage I chose for the test is representative of what you might see in the car, though. You should probably measure the voltage at the pump as you rev the car out under boost with lots of electrical accessories on to see if it is appropriate or not. I wish I had done that before the test, but I didn't have time:
http://www.maxcooper.com/rx7/parts_i...exi_bnr32.html

Don't trust the HP rating on my fuel pump test, either. I just posted what I got back from RC. What you can trust is the flow numbers at the different pressures, but only if the voltage is right.

-Max

SPEED_NYC

iTrader: (3)

Thanx Max, i read your earlier post about hp ratings and flow vs. pressure. thats why i asked how i can calculate the total flow of 2 pumps running in paralell at a given pressure. i know its not as simple as just doubling the flow rating for 1 pump. anyone have any ideas?
thanx

13BAce

No, I sold the pump to Mike with a sumped tank. I'm still using the ND in tank pump Jason sells.

RICE RACING

The pump in that picture is too small. It is the lower capacity one that Bosch make.

The one I use has the last for digits of the part NO. ending in 044, this pump on a rotary will support 600+BHP.

I use two of these on a PP turbo and one on my 500+hp road car on my road car, they are the true Bosch Motorsport spec pump that can pump up to 90 psi fuel pressure.

I used to used that lower (pictured) spec pump in my raod car, but it was at it's limit at 480bhp.

RX794

Can this pump be used intank in the same position as the stock pump on a 3rd. gen. standing up pulling fuel from a strainer?

Greg

Whats wrong with the RP competition Fuel pump AKA whatever car it came from. Pluto (Steve Khan) made good hp with that pump (582@wheels) Has anyone had a bad experience with that pump?

Kurgan

I don't know about you guys with UBERPOWER, but I have the RP competition fuel pump in my car and it works great. You can't hear it at all. My car was making ~425 bhp with that pump and running rich... so, you know, um... yeah.

setzep

Hey RICE RACING

The Bosch P/N of the fuel pump I just bought is 580 254 979, It looks like that black one from what I can see from the pic but it's all aluminum, no black. Is my pump somewhere inbetween your 600bhp and the black one? I guess my main question is will it support 400bhp on a turbo rotary?

13BAce

I've seen people do it. Here's a how-to on the Bosch pump M2 sells: http://www.efini.net/fuel.htm . The pump that Precision sells doesn't have the nut at the bottom. I forget the numbers on the pump, but I could ask my friend if anyone is interested.

13BAce

I'm using it in my car, and I don't seem to be starving for fuel.

SPEED_NYC

iTrader: (3)

for everyone wondering about the black or silver bosch pumps, that one in the pic above is a silver pump with the black foam noise filter thing on it. i've seen bosch pumps with that foam in oem applications.

as for the bosch motorsport pump you refered to Rice, do you have the complete part #? when you say that pump will support 600bhp on a rotary, what does that translate into dynojet wheel hp? i wanna know if i will need one or 2 of them. i'm not gonna go with the RP pump, because my car/tank is already set up for an external pump.

thanx for the replies!

Boostn7

SX pump don't seem to last very long for a daily driven car. Those guys even have a loaner program while they rebuilt your pump !!!

Euromotive pumps are better pumps and I made almost 500 RWH with one... but ratings are at zero pressure and they flow well at low pressure but at 50psi and higher they're effiency drop like a rock.

Most of the Supras guys (MKIV.COM) making huge RWH numbers (700+++) seem to be running two MKIV pumps intank or two Walbro 255l(highpressure) fuel pumps. Those Walbro pumps look small but yet there's plenty proven tests of their flow from the DSM, Supra and others. Pumps are also cheap too..

John D.

SPEED_NYC

iTrader: (3)

what pump are you running now John?

13BAce

Good point. soul assassin is running a dual in-tank setup in his FC making 520 RWHP.

setzep

Here's a pic of my pump, hehe got it for $40 "out of the box special"

SPEED_NYC

iTrader: (3)

OK, heres the bosch part# for the mid eighties porch 930 (911 turbo); 0580254996. I was told by corky bell that this is the 'best bosch pump'. its from an 80's car wich uses a cis (constant injection system) which run under much higher pressures than the newer porche systems. he claimed this was the best bosch pump, but he said that he haddent heard of the bosch motorsport pump that Rice was talking about.

Corky has told me on several occasions that he no longer likes bosch pumps, and he now uses peirburg pumps exclusively. i bought one of these peirburg pumps from him about a year ago for another project. the peirburg is a OEM replacement pump for one of the early porch turbo's as well. Corky said that he began havving trouble with reliability and noise issues with the bosch pumps. he switched to peirburg 9 years ago and SWEARS that it is a better pump. he told me today that the peirburg outflows the bosch at every pressure level, and that it is by far the best pump he has ever used. i asked him for flow data on the peirburg and after shuffling some papers he gave me this:

Peirburg Pump: 40psi 370lb/hr 62gph
75psi 340lb/hr 57gph
90psi 320lb/hr 52gph

i dont know if this was BS or not, when i asked him if these were estimates or actual measured results, he told me that he had tested the pump personally and got these figures. when i asked him for a copy of the test results, he said that he only had the 'notes' he took during the tests. he also said that there is no documented test info from the manafacturer. i dont know weather or not to believe him. he told me that one of these pumps would be good to 600 flywheel hp on a turbo 13B. i dont usually just believe claims like that without documentation, but he's corky bell right? he should know what he's talking about, right? or is he just trying to sell a pump that is more profitable for him than the bosch? how come no one else uses these peirburg pumps? what do you guys think?

i already have one smaller bosch pump, and i have one peirburg pump. do i buy a second bosch, or a second peirburg? or do i continue to search for the bosch motorsport pump, that nobody can seem to locate??

i'm still looking for performance shops that sell bosch pumps(all the distributors listed on the bosch site are oe retailers and dont understand why i want flow ratings) i also need a site that has flow ratings for diffrent bosch pumps.

does anybody know where i can find this info???

btw, heres the part # for a bosch pump out of a 7 liter mercedes V8 #0020919701
7 liter V8, dont you think that that pump would flow more than the V6 porche pump? the parts guy said that its also 1.5 times the size of the porche pump. any suggestions?

Rice, WHERE DID YOU BUY YOUR PUMP???
get me one

thanx for the help..

BTW, setzep, the part guy told me that the part # on the pump you just bought is from a Porche 911 C2.

SPEED_NYC

iTrader: (3)

OK so i'm starting to think that Corky is BSing me about this peirburg pump being better than the bosch, so i decide to surf a little and i come across this: http://www.nolimitz.com/Alpina_b7/AEngine.html

hmmm, BMWs come with bosch fuel injection from the factory, and bosch stuff is VERY good. why then would alpina CONVERT the B7 Turbo to Peirburg fuel injection if it wasn't BETTER than the bosch stuff???????

setzep

thats a good thing right??

RICE RACING

The pump is $400 Aus and the freight would be around $50 Aus to send it to you.

If you need one send me an e-mail riceracing@ozemail.com.au

You know my thoughts on Mr Bell

RICE RACING

It's a Bosch Motorsport pump, it is not used in a road car as standard (VW, I mean Porsche, BMW, etc).

I have mine instaled in the car so it is hard to get the full number, but anyone who deals in the Bosch "racing" parts will know of the pump I am refering to.

All of us in Australia who use supply these, refer to it as an "044" (last three digits of part no.) cause it is easier than remebering the whole ******* number !

Later I will ring the guy I buy them of and ge the "full" part no. for you.