Dual Fuel Pumps...yes? no?

I cut open my old fuel filter and it was deep with mud on the bottom of the can and the actual filter element had Bosch granules all over the place.

After seeing that, I don't know if running the pump backwards would be a net gain or not. I also don't know if I have a fuel sock in the tank anymore, either.

If you wanted the ability to reverse the pump, instead of screwing around with 80 feet of wire and a double-pole three way switch, why not just make the connector to the pump accessible and not keyed. I'm thinking like using two pins of a 4-pin trailer connector, you can choose to use only two of the wires in such a way that you can unplug it and reverse it.

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Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
1978
Silence is golden, but duct tape is silver.

eeewww

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First Rally: 2010 First RallyX: 2004 (a bunch)
Driver (0), Co-Driver (7)
Organizer (3), Volunteer (3)
Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5)
Last Updated, Apr 9, 2023

It's somewhat trivial to make a reversible motor switch from a dpdt switch... no extra major wiring required

Quote
Gravity Fed
eeewww

Yeah, I wish more people would chop open filters and see the gorp and goo and SAND, that'll cure the "I dunno, I should be OK" I always hear from EVERYBODY. everywhere forever
Yeah should-schmud.

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John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

where does my audi get off with the pumps BEFORE the filter?

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First Rally: 2010 First RallyX: 2004 (a bunch)
Driver (0), Co-Driver (7)
Organizer (3), Volunteer (3)
Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5)
Last Updated, Apr 9, 2023

Quote
Gravity Fed
where does my audi get off with the pumps BEFORE the filter?

Cause OEMs have a filter on the pick up in the tank, natcherly.

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John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

Lots of line in this photo that I'd eliminate if I did it again, but the important things are visible. Inside the tank is a sock and lift pump. Then a corse Kinsler stainless filter that's easy to open up, check and clean. Next is the surge tank and pressure pump. Then is an OEM style GM Truck fuel filter that is cheap and easy to replace.

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Jason McDaniel

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Jason McDaniel

Quote
EricW
It's somewhat trivial to make a reversible motor switch from a dpdt switch... no extra major wiring required

What if you're running the pump through a relay?

Maybe pumps are low current enough that you could trust a switch to it, but it still seems hinky to me.

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Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
1978
Silence is golden, but duct tape is silver.

I thought about the reversible switch too but i figured I could juest mess with it on stage if it went south.

Also, my pumps are in tank, will that be a problem? Or just more of a hassle?

This is what the Corolla has in it. Blake and Joel did the hanger and I just put some new pumps in and tidied up the wiring when I went through everything. I like the peace of mind of having two pumps in the car, hopefully one less thing to worry about on stage.

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John Reed
John Reed Racing
www.johnreedracing.com
johnreedracing@gmail.com

Are those the mains or just the lift?

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Self-righteous douche canoe

Btw, if anyone else uses Walbro 255s....then you can get them cheap at your local auto parts store. Same EXACT thing as the Airtex E2448. I got both for 130 bucks.

I wonder how Ford Motorsport survived making 390 bhp with a Bosch 150 l/hr?

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John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

On the topic of fuel pumps. Run the lines up the trans tunnel? or on the other side of the co driver?

The compression fittings for hard lines to adapt to AN a good idea? or use proper flares and a thread in adapter?



Edited 1 time(s). Last edit at 10/24/2012 10:00AM by aj_johnson.