Quote:
Originally Posted by 68bird400HO
I had fuel pump issues a few years ago and started a thread on it. I had replaced my leaking fuel pump and the new one died after about 100 miles. I did find the reason for the pump failure and started discussing it at about post #58. Here is a link to the thread at page 3.
https://forums.maxperformanceinc.com...=868529&page=3
In short, the failure isn't the diaphragm, it is the arm. The repops are using the wrong arm. It appears the repops copy the Delco body but are using the Carter arm which is a little different and sits a little higher at the eccentric contact point. This puts too much pressure on the arm when compressed and they eventually break, and the car dies instantly. There are some out there with the correct arm, the "Muscle Car Fuel Pumps" from Summit or Jegs but I am not sure if they are produced anymore.
You also could try to buy a repop and swap the arm. I was messing with that a little and just don't have the correct tool to uncrimp the aluminum to get the arm pin free. I think it would slide out if you could do that, though. |
I remember seeing this post and it didn't sink in.
Thanks for bringing this up again!
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So when I installed a Delphi pump that had low enough pressure to avoid overpowering my carb inlet, I may have also sentenced it to a short life?
Hmmm.... I will have to check this!
Do you know if the difference in arm geometry affects the pump stroke?
If so, I now wonder if these new aftermarket pumps have reduced pump volume because of the "wrong" arm? If so, maybe this contributed to the amount of cranking I experienced to fill my carb when the bowl was dry?
I kind of doubt it because of the flow ratings but it's a thought....
Mike