I just installed a Walbro 400 in the tank today to replace the factory in-tank pump. I still have the old 255 inline pump installed and was wondering if I should take it out or just leave it there. Will it still do anything in terms of increasing flow or will it actually decrease flow from the 400? I kind of like the redundancy of two pumps for road trips but don't want to decrease the efficiency of the 400 either. What sayeth you all?

 

I'd remove the inline pump, it will be a limiting factor in your fuel system.

Did you upgrade the harness to the new W400?

 

I did the Racetronix harness. It's a really nice piece of work and I don't know how they build them for $60.

I figured the 255 would create some blockage. It's easy enough to remove from the system. I'll leave it in place there but will bypass it.

Picked up a used nitrous wet setup too. I had this engine built for all of this. I'll be headed to the dyno soon, in search of 700rwhp.

 

Remove it, you dont need it.

 

Remove and sell