This is from another post on dragracing.de that I posted on this question, so I copyed and pasted it.



It is not recommended to use electric fuel pump with Alcohol carburetors.

First the Alcohol will attack the rubber inside the pump.

Second all Alcohol carburetors use titanium needles in the needle and seats.

If you try and set the electric fuel pump at the normal 9 psi the needle and seat will not hold that pressure at idle, after 3 1/2 psi the needle will start leaking. Then it will start dumping fuel passed the boosters and make it in possible to make the car idle good.

Also as you run the car up the track with Alcohol, a electric fuel pump will not keep up with the fuel demand.

A electric fuel pump can be used on a motor with less than around 650ps on Alcohol, not the 1000ps you would like to run.

So you need to use a mechanical fuel pump, this will alow you to have the low pressure at idle 3psi, and then 10 - 11psi at the finish line.


Here is the link to the other post http://dragracing.de/thread.php?thre...ight=fuel+pump

I hope this helps Tony