Yes i searched. I havent found any conclusive answers. How much power have you made on a returnless system with no meth.

 

Flex Fuel pump?

 

It depends on the pump, injectors, fuel, type of power adder...

The two systems are really the same thing, just one has the regulator in the tank.

 

I will have a complete aftermarket setup. Im mainly concerned about the rails. THis will all be in f150 swap im doing with a 5.3. Right now i have a returnless rail and was wondering if i should try to find a return system, rig up some aftermarket car rails or would the returnless setup be okay. And i would like to knw just for the knowledge of it.

I would like to use the vette filter if possible. or if anyone has any recomendations for an aftermarket regulator that would be cool also. The truck will be twin turboed. shooting for 700 ish.

 

This is whats going on.

 

im wondering the same thing with my 2005, im looking to make around 500 hp more or less with a 70 or 72 turbo, so im wondering the same thing whats the limit with returnless?

 

Im pretty sure you can reach 500 with a walbro and a returnless system for the post above this idk about the op

 

My truck made 510rwhp with just a walbro and 72lb injectors, other than that the fuel system is stock returnless..

 

returnless here. made 486 on 72lbrs and a 255

 

I ran 10.90's at 126 mph at 4600 pounds with a returnless setup. Granted that was with255 in tank, 60 lb injectors, edelbrock rails and one M15 meth nozzle with the meth pump turned all the way up with straight M1 Methanol. My 60's where beyond maxed at that point.