The Fuel Pump Thread

[tricstar]

The fuelab have inbuilt speed control, just a 0-5v input from your ecu.

Xklaba I gave you a bum steer, I not using the PWM, just the inbuilt controller.

[XKLABA]

I think that is the same thing, just one is constant 0-5v while the other is a pulse 0-5v, I currently have a PWM controller controlling the Weldon from a PWM output from ECU, the next one will be the Fuelab electric FPR controlling the pump

I'm not sure on what input the pump takes though, weather it has to be constant 0-5v or if it can take a PWM signal

It was the pump itself I wanted to know about inparticularly the noise of it and how reliable it has been

[tricstar]

Yeah they can take either PWM or the 0-5v input to use it's inbuilt speed controller.

Edited November 4, 2014 by tricstar

[scotty nm35]

Pretty sure it needs to be a PWM, the regs have a pulsed output. Dropping dc power onto the pwm input just puts it in slow speed.

Don't run the Fuelab at full noise for more than 10 minutes, it won't like it at all, and using the existing pulse width controller you have will stuff it. Stick with the fuelab reg for best results, less tuning required too.

[XKLABA]

I'm going to use the matching Fuelab electric reg, even if I didnt why would someone use a PWM controller to run a pump that has one built in

I'd be worried if I couldn't run a pump at full noise for more then 10mins

Even my Weldon went for 1 1/2 hours at full noise on the dyno with out an issue, I realy like the Weldon just can not take the noise which is louder in the car then outside

On paper the Fuelab pump and reg looks the tits, I hope that will transfer into real life

[GTR81]

So how noisey is the Weldon pump compared to a bosch 044?

Also is anyone using the weldon 1100-A in line pumps, apparently they are supposed to be alot quieter than the normal ones

[XKLABA]

I have made my Weldon as quite as I can and it would be as loud as 3 044s running at full noise

I looked at the 1100-a but they weren't E85 rated back then, don't know about now

[GTR81]

Ok thanks, ill have to do a bit more research.

Is yours mounted under the car or in the boot?

[XKLABA]

Under the car

[Country Cruzin]

Currently running 400kwatw on E 85 with a Bosch 044, looking for another 50kw atw but know the 044 must be close to maxed out. Will a walbro 450 in tank handle that ok, or are there better options, don't really want to lose more boot space to a surge tank as the car is my weekender. Running ID 1300's if that is any help. Any advice will be appreciated

[The Mafia]

Currently running 400kwatw on E 85 with a Bosch 044, looking for another 50kw atw but know the 044 must be close to maxed out. Will a walbro 450 in tank handle that ok, or are there better options, don't really want to lose more boot space to a surge tank as the car is my weekender. Running ID 1300's if that is any help. Any advice will be appreciated

Friend of mine made 460awkw on E85 at 26psi on his BNR34 with the walbro 460lph pump. Needed to be wired to get a full 14 volts though.

I am about to do the same thing in about 2 weeks.

[scotty nm35]

Lowering the base pressure and getting full 14V to the pump will help with flow. Look into bumping the voltage even higher if you can, 18v would be great using a high current DC to DC converter, or even tapping power off the alternator before the regulator may work? Otherwise twins would be the go, or a large external.

[The Mafia]

I have another friend that is going to run his Bosch pump at 20volts. He's got all the gear and knows what he's doing. Can post back how that works too.

[Blackkers]

Anyone used 2x walbro 255's?

I haven't heard of it but the amount of flow vs the current they draw is better than the 460 version from memory.

[zebra]

Would be an interesting comparison.

Single pump is easier though

[Ben C34]

Scotty does.

[scotty nm35]

Anyone used 2x walbro 255's?

I haven't heard of it but the amount of flow vs the current they draw is better than the 460 version from memory.

Scotty does.

Now the 460 is available there isn't much point. Works great if you can isolate one pump to run 3 cylinders, at least that way you will know if one fails.

460L walbro at 20v might flow near 600kw. Would be very interesting to see it's capabilities, but I suspect the inlet may cavitate. Large singles like the fuelabs recommend 10-12an inlet lines to counter the cavitation.

To flow that much on a stock looking fuel system would be crazy for those with stealth builds. Most can't believe what we are squeezing out of them already.

[Country Cruzin]

You thinking 600kw atw or engine? The walbro site does say they are for 750+hp but I'm guessing that's at the engine. And not sure what voltage they intended.

[scotty nm35]

If they are flowing 450wkw at the moment at 13V and a high base pressure, what would it do at 20V, a lower base pressure and less boost on a large turbo? It's anyones guess but 600 at the wheels isn't a stretch, and that's on ethanol. On petrol... Who knows.

Question is, do you want to lean on one that hard, or just fit another 460 (or any other large external pump capable of pushing that flow continuously.) I imagine a surge tank is a requirement at that sort of power anyway.

[omnigear]

Walbro 400lph E85 Pump good enuff for 450kw on corn?

or this pump still having issues?