Thinking of going with dual intank pump set up, which psi turn on for second pump?

[UDLOSE]

Going to switch from my old walbro 307 to the new racetronix dual intank pump, what turn on point do most people use 4lb, 7lb, or 15lb. Car is Gn1 headed, 70mm turbo, built motor,83lb inj, dual nozzle alky kit from alkycontrol. or should I run them both all the time and run new lines? running 22 psi right now but seems like I'm running out of fuel.

 

[Slow91z]

Yeah I think you'd dry up a 307 pretty quick with that combo.

Higher is typically better, helps keep it from having a rich spot during spool up...I think mine's 10.

 

[BEATAV8]

I originally bought the 15psi, but just picked up a 7psi too. trial and error.....

I think I'll end up with the 7psi switch.

 

[YAKO]

Buy a adjustable hobbs switch and adjust between 15 and 18 or what ever suits your ride