What is the difference between an electric fuel pump putting out 7PSI and a mechanical one that uses vacume. Does one make a difference over the other?

 

Im confused its kinda answering ur own question. Electrical fuel pump uses electricity to use it. A mechanical fuel pump uses a push rod that goes to the cam to use it. One electronics, one mechanics. I dont even know why you would ask such a question.

 

I was asking if there was more of a performance difference between the 2.

 

Depends on the quality of the fuel pump. Electric or Mechanical one can out perform the other. However an Electric Fuel pump can be primed with out turning the engine over. Also an eletrical fuel pump doesnt use any HP to run because its electrical and no extra rotating mass. Hope that answers ur question.

 

I am not disputing any of this being said. However IMO, there really isnt much of a HP loss in relation to a mechanical pump. The electric pump will prime without cranking, but as long as you dont have leaky fuel lines, and a good carb on top, priming isnt an issue anyway. My personal preference is to keep things simple. If I can use a mechanical pump, I would.

Edit: *** I need to slow down and check my spelling more often

 

The power has to come from somewhere. Unless the electric fuel pump is solar powered, the power to run it comes from the engine.

 

ok not as much, it uses energy thats provided by the alternator which is going to be spinning anywayz so its not using any more

 

The fuel pump is going to load the alternator to the tune of the watts (volts times amps) that it is pulling. There is no free lunch. It takes power to move the fuel and raise the pressure. It's a fact of life. The alternator does not spin for free.

It may not be much, but neither is the power required to run a mechanical pump. The electric probably requires less power - true.

Now, whether you could see the difference in back-to-back 1320 runs - probably not. Kind of like people thinking they're going to go so much faster if they remove the A.I.R. pump belt.

 

But my geat uncles, cousins, brothers, aunts, nephews, former college room mate told me that i could gain a tenth by taking off the air stuff! I know hes gotta be right!! :lala: :lala: