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Fuel pump mounted up top by cell?

Old 12-30-07, 03:07 PM
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Fuel pump mounted up top by cell?

I'm having second thoughts about moving my fuel pump after getting contradicting opinions from Google. I installed a surge tank and decided to re-plumb the rest while I was at it.

Everything else is done but I have stopped with the outlet and pump (regardless, outlet elbow needs to be replaced with sweeping elbow).

Can I mount the pump where it is located in the picture? Is there a safety concern? Will the pump function properly? Pump is a Bosch 044. The idea by moving it from underneath was easier access.

The whole area is covered in an aluminum box, second picture.



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Old 12-31-07, 10:14 AM
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When I installed my surge tank system a couple years ago I mounted my Bosch pump on top similar to the way your's is pictured. In the past two seasons I've had no problems at all with fuel delivery. I assume that I see a fuel filter in the feed line to the pump. That one is important since typical fuel cells don't have a filter sock on the pickup. I had some issues with dirty fuel reaching my stock SE high pressure pump.
I don't have much of an opinion on safety here... I can say your's is probably safer than mine since I used all rubber lines. Also, you should have a check valve in the vent line so if your car somehow finds a way to come to rest on it's left side there will be no fuel leaking out the vent line. You should have a simple cage built under the cell in case something happens to let it drag on the ground. Those are typically built with light 1x1 square steel tubing. Most circle track stock car rules require a 1x1 top top to the cage as well so the cell is totally within the structure. Suprisingly SCCA doesn't require anything but a thin tin can surrounding the cell.
Anyhow, it looks like a very clean setup to me. Nice job.
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Old 01-03-08, 08:23 AM
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Thanks jimeby. Yes that is a filter at the outlet and the vent is a check valve. I wrote Bosch and this is what they had to say....so, I need to find a pre-pump.

Hello Mark,

to grant the function of the 044 pump it should be mounted horizontally below the fuel level because the pump is not self-priming.
This kind of installation should be ok even without any kind of pre-pump.

If you would like to choose another location for the pump it will only work properly by using a pre-pump (e.g. in the fuel cell as you already mentioned).
Unfortunatey we do not have pre-pumps in our product-range that I might recommend to you.
If you are looking for a pre-pump you should ensure, that its fuel delivery is the same as of the 044 pump at minimum, better if it would be 5 - 10 % higher with a low fuel pressure.

Unfortunately I cannot offer a fitting pre-pump to you.


Regards,

Philipp


One other problem, good luck trying to fit a - 6 AN fitting or any AN fitting for that matter to the 8mm hard fuel line. You can do it with a 5/16" rubber hose and jam it onto a barbed -6 AN barbed fitting but that's half a**. Numerous phone calls later and I finally found a hydraulic hose shop that had an 8mm compression fitting with some German threads and then a -6 AN fitting...even that had to be customized by boring it out some as to not restrict flow.
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