93 Rx7 Ls2 Project.

[Quik]

@Orr89rocz

I think you will work them harder to have them both on the same time since you wont need the other pump until your approaching over 500whp. The pressure spike in the lines will be greater when they both turn on at the same time upon WOT hits. Running more pressure runs pumps harder. There shouldnt be as much of a pressure spike if you turn the second pump on at the right time its needed. Once one pump is maxed out, line pressure should start to drop off so thats time to turn on the second.
I have mine on a hobbs switch for 4-5 psi but wish it was like 7-8 psi since I am not over 500whp until about 7psi i’d guess. 12 made 640 running abit rich so i guess 6-8 psi is over 500whp. I’d run it on a hobbs switch if you can.

Wirin them together youwont get a spike. Mine are same time and don’t have any issues. Hobb switch can fail and then yourscrewed. Wiring them same is safer and is easier to tune since yolu remove any odd variable that can screw with ve vtable