AEM E85 Fuel Pump - Tube keeps falling off...

DrBacon · 06-27-2021, 01:09 AM

Quote:

Originally Posted by Jhill

Yes as I said I came from the walbro 255 and it was stupid loud (in my opinion). The walbro 255 is notoriously loud and is actually louder than their higher volume pumps. Google search it and you’ll find videos of it louder than an American muscle v8 exhaust and then switched to the DW and being whisper quiet. The walbro 255 is a vane pump most others (I believe including walbro higher volume) are turbine pumps.

I overlooked the part of you having the walbro 255, my bad. I was just pleasantly surprised with the 525 as I had expected it to be fairly loud.

SeeThruHead · 06-27-2021, 11:39 AM

Quote:

Originally Posted by DrBacon

I overlooked the part of you having the walbro 255, my bad. I was just pleasantly surprised with the 525 as I had expected it to be fairly loud.

Blog Post Radium's Ultimate Fuel Pump Test

Quote:

The Walbro "255" uses a gerotor which is inherently noisy.

SG4247 · 06-27-2021, 05:31 PM

My DW is very quiet, and low amp draw, so these are reasons I wanted one.

It wont support big power, but it will make 400hp NA on E85.

THE BULL · 06-28-2021, 10:12 AM

Quote:

Originally Posted by BossJ

So I should of been more clear.

I'm in FL - so I just chat to Seb on the phone every great while. My shop in town, did not drill anything.

I take it, that NEEDS to be done - What do I tell them exactly to do? I'm going to Ztuner in Bradenton tonight, to get it dyno'd and looked at...

I just got my MAFs and TBs cleaned out as well.

Thank you

Keep us updated, usually when taking things to others and these issues happen then I would ask the OP to take it back to that person and have them at it. Usually as well those that end up taking the work know how to on these installs (hopefully) and are able to get it fixed.

The reason why it's popping off after the right measures are taken is excess pressure from the pump.
With a fuel pressure gauge you'll be able to confirm this theory and can point you in the right direction as to what next.

Spooler · 06-28-2021, 10:55 AM

Quote:

Originally Posted by DrBacon

I overlooked the part of you having the walbro 255, my bad. I was just pleasantly surprised with the 525 as I had expected it to be fairly loud.

My twin 450's are not even noticeable. You can barely here my one pump running at startup.

Jhill · 06-28-2021, 04:35 PM

Quote:

Originally Posted by Spooler

My twin 450's are not even noticeable. You can barely here my one pump running at startup.

Right. I believe the 255 is the only one that uses the vane system.

Spooler · 06-28-2021, 05:14 PM

Quote:

Originally Posted by Jhill

Right. I believe the 255 is the only one that uses the vane system.

If that is like an old Bosch 044 then that thing was noisy as hell.

BossJ · 07-01-2021, 11:45 AM

Quote:

Originally Posted by THE BULL

Keep us updated, usually when taking things to others and these issues happen then I would ask the OP to take it back to that person and have them at it. Usually as well those that end up taking the work know how to on these installs (hopefully) and are able to get it fixed.

The reason why it's popping off after the right measures are taken is excess pressure from the pump.
With a fuel pressure gauge you'll be able to confirm this theory and can point you in the right direction as to what next.

Chatted with seb - after putting on dyno - I’m 30hp off where I should be. Getting it drilled tomorrow and fuel gauge installed and then Seb is retuning it.

I’ll keep you posted.

lexi.z34 · 11-30-2023, 03:59 PM

Hey, I recently installed a 340lph aem fuel pump as well. I had issues for a while with the fuel line coming off and now I’m having issues as well with the wiring. What did you use to connect the wires? And what did you use for the line?

06-27-2021, 05:31 PM	#33 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 724 Drives: 2010 touring Rep Power: 4486	My DW is very quiet, and low amp draw, so these are reasons I wanted one. It wont support big power, but it will make 400hp NA on E85. __________________ NA on E85 - 12.669 @ 110 mph (stock fuel pump) 100 shot E85 - 11.589 @ 117 mph (DW fuel pump) JWT C2 cams rev Base Circle & Titan Valves

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11-30-2023, 03:59 PM	#39 (permalink)
lexi.z34 Base Member Join Date: Jan 2022 Location: Florida Posts: 1 Drives: 16 Nissan 370z Rep Power: 3	Hey, I recently installed a 340lph aem fuel pump as well. I had issues for a while with the fuel line coming off and now I’m having issues as well with the wiring. What did you use to connect the wires? And what did you use for the line?