Failing Fuel Pumps

[Tim Lisson]

I just zoomed in on your picture and it appears you have the outlet facing towards the rear, which means your supply side is coming out of the cell and going around the battery to the front of the pump, that would cause cavitation if that's the case.

[69Cobra]

Originally Posted by Tim Lisson

I just zoomed in on your picture and it appears you have the outlet facing towards the rear, which means your supply side is coming out of the cell and going around the battery to the front of the pump, that would cause cavitation if that's the case.

I thought I seen the same thing but wasn't sure.

[SSDiv6]

Originally Posted by Tim Lisson

I just zoomed in on your picture and it appears you have the outlet facing towards the rear, which means your supply side is coming out of the cell and going around the battery to the front of the pump, that would cause cavitation if that's the case.

Great catch Tom!
On the Ford installation, the fuel pump outlet is backwards and you can see the casting inscription "OUT" towards the rear of the car.
I have marked the area with the inscription.

On the Hemi car, the pump is installed correctly.

Also, in both installations, as it was said before, the venting has to be routed to the exterior of the car.

[Tom Nolan]

Aeromotive guy said the little bit extra hose will not cause cavitation! Only way to have cavitation is to suck air....the hose is full.

[SSDiv6]

Originally Posted by Tom Nolan

Aeromotive guy said the little bit extra hose will not cause cavitation! Only way to have cavitation is to suck air....the hose is full.

Tom, did you look at the picture in my last post?
I marked the area showing what appears the fuel pump outlet is towards the rear of the car.

[Steve Calabro]

Had the same problem with the Aeromotive. Was told by Aeromotive that you need #12 from the cell to the pump because it pumps so fast with the 16V. I see that the Product Engineering pump says to use #12 line also.

Tom, I see you dropped the voltage with yours and still have problems, did they recommend that you do that?

[Sean Marconette]

Cavitation can be caused by a low pressure area at the inlet of a pump and fluid will boil. With the pump mounted where g-forces are acting on the pumps ability to have fluid being pushed into it on acceleration it may be the problem for the mechanical failures. We run into similar problems like this on open hydronic systems.

Did Aeromotive give any reasoning for the mechanical failures?

[Tom Nolan]

I will turn it around. Thanks for your help guy's.

[Chuck Norton]

[QUOTE=Mike Taylor 3601;
Can't remember Product engineering's owners name off top of my head,but he designed BG 400,Grant patented it on him,then designed the Magnafuel style with filter built in.
Mike Taylor 3601[/QUOTE]


I believe that the missing name is John Rademacher. He advised me on setting up the fuel system on my LT1 Super Stocker almost fifteen years ago. Worked flawlessly.

c

[Bob Mulry]

Hi,

With a filter installed in the supply line to the pump you have the potential to have a restriction.......

With a restriction you could have a negative pressure in the line causing the fuel to flash into a gas (vapor lock) and have pump cavitation which will destroy the pump....

I would recommend removing the filter between the tank and the pump and if you are worried about trash in the pump use a filter funnel to add fuel...

Hope this helps,
Bob