Does anyone know or seen listed how much % any voltage boosters increase your fuel pump flow. I have a returnless system and I am challenged even more than most with coming up with easy/cost effective ways to supply enough fuel for 60lbs injectors. I can always add a return line and an inline pump if I have to. I have the magnacharger 255lph in-tank pump now.

 

I found my own answer. Apparently Kenne Bell claims about 66% increase. That would put the flow of a 255lph pump to 423lph . That should be enough. The Magnavolt or Aeromotive ought to do about the same. Problem solved.
Now which one do I buy

 

Sounds kind of high. What kind of voltage are they talking about? Some good charts here: http://forums.corvetteforum.com/show...ch&forum_id=87 These charts also show supported HP for the different pumps/combos at various fuel pressures. The more boost(= higher required fuel pressure) you run the lower the pump's output will be. There is a chart for the Walbro at 13.5 and at 16.0 volts.

 

I just did the math on the increase in flow #'s that Kenne Bell claimed. I later read that they claim up to 50% increase. I am going to try a voltage booster of some kind to start with. I will go from there if it isn't enough.

 

Well it seems you are done with this thread so I will HIJACK!!
This unit is actually an early Magnuson unit but I think it is pretty much the same as the Kenne bell. Anyway.....
I just want somebody who knows how to install a boost a pump to look at my wiring diagram. Both reds go into the Hobbs switch so that it completes the circuit when it closes (which is 3psi for this switch), am I right? The black is a ground that I will most likely strap to the firewall or possibly the Alt if it looks better. Connect the other wires to the pump, Then I just "T" into the vacuum line that the FPR is connected to and I'm in business? If anybody has instructions let me see.

 

Oh yea,

Do I run a wire from the ??? to splice into one of the red wires to get power to the unit to begin with or what?

 

Caspers Electronics sells a V Plus voltage booster for 80 bucks. It connects to the alternator and TPS. On full throttle the alternator increases to 15 volts output. There are several models or it may require a different connector for a late model truck. I'm using it with both an intank and an inline Walbro 255l pump. I notice at night my lights get a little brighter on WOT. So far it works and I'm holding off on a dual intank setup.

 

Who told you to wire it like that ? one of the the big red wires go to the pump and the other big red wire goes to the pump signal wire, the little wires go to the hobbs , you pretty much have it backward

 

Now that certainly makes sense. The long wires going to the hobbs could lead you to believe that they would run back to the pump. I guess it's that way just so you could mount it by the tank to keep voltage loss down in the wiring.

 

Ok, Well, I think I got it except I don't know what a pump signal wire is. This is going onto the in line pump if that makes a difference. No the in-tank pump.