joyridin'

iTrader: (1)

I put a LSA supercharger on my stock LS3 with a cam. I was going to try to run both the second fuel pump and the methanol/water injection off the same Hobbs switch so when the pressure gets to X amount, it kicks them both on. Roughly what PSI would be good to start the injection?

Pretty basic question I know, but if I can't go this route, I can wire the second fuel pump off another Hobbs switch. I plan on running about 11 psi, maybe more if everything works well.

NitrOmm

iTrader: (1)

4lbs is a good start point for the meth ( progressive from there). I can’t answer for the fuel system.
For my $0.02 .... I wouldnt want to depend on both (very important) components of the fuel system being triggered by one Hobbs switch.

jimmyg

When I put mine on , snow recommended 7 psi
All in by 10 It might bog @ 4 but mess around with it see what works .

brandon6.0

iTrader: (32)

I wouldnt turn it on to low. Probably best around 10psi.

For example: u make 5psi on the 2 step. U dont want water/meth spraying at the same time!

joyridin'

iTrader: (1)

I am probably going to shoot for 7 psi and see what happens. As for running them both off the same Hobbs switch, they are running to relays, so the Snow system is set to turn on at 7psi, and the second pump will also, but if the Hobbs switch goes bad, the second fuel pump defaults to the "on" position.

Thanks for all the replies!

gametech

iTrader: (1)

With a PD blower, you would make full boost off a two step. Entirely different than a turbo or centrifugal blower.

jdwtx85

i was worried about this byt my alky controller has a wire for the 2step