I am ready to ditch the whipple crap tronics and would like to get 43lb injectors. I have one question, do i need a new fuel pump with this upgrade? Or will the factory fuel pump be just fine. Thanks for all the help in advance guys.

 

If so what pump do i need and and part number would help alot. Also where can this be purchased.

 

You will need a new pump. Walbro 255 lph.

 

Thanks quicksilverado. Is this what everyone uses with the whipple supercharger. Anyone else use something different, i would like something external for a pump. Thanks

 

I want what ever is best for a pump. Is there any mods that have to be done with the new pump?

 

It is not a direct replacement. You will have to modify your setup to make it work. Read this thread.
https://www.performancetrucks.net/fo...d.php?t=366773

 

with respect to quicksilverado i will say that a pump is most likely a good idea. However, I am running 43lb'ers in my 8.1L with a 2.3L whipple and have not needed to add the pump yet, still running the stock pump. I am showing 55-58lbs at idle and have seen as much as 66-68psi at WOT. I have yet to experience any drop out of the stock pump yet. With my new pulley i know for a fact that i am over 400rwhp. My suggestion would be to do it without the pump first, then see if you actually need it. As Quicksilverado illuded to, the upgrade pump is not a direct replacement. I had actually bought the pump and dropped the tank and had everything out on the work bench when i realized it was not a direct replacement. At the time, i did not want to modify the basket in the tank, so i rolled the dice and put it back together to try it without the pump. Have had no problems yet. Maybe im lucky....but thats how its been for me. Here was my thread when i was dealing with the fuel pump issue....

https://www.performancetrucks.net/fo...d.php?t=359939

good luck.

 

Linda, I would think that the fuel pump used for the 8.1 is capable of pushing more fuel than the pumps used for the small blocks.

 

I made 442rwhp with a Whipple on a 6.0 with the stock pump and 42pound injectors

 

I have the 43delphi at 10lbs with the factory pump and it stays at 58psi and it dosent dip