As the boost psi comes up the msd box will increase voltage to the pump. Just like a electric motor. More volts you put to it faster it spins. This will also help with loss of volts through the factory wiring goin to the pump. The two long lead wires, (+) (-) runs from the msd box to the pump. Decent size wire too.
2004 silverado rcsb 2wd cammed 6L, 3.42's, Hydroboost swap, 4l80e w/hd-2 and yank 3200, twin intank pumps, 60lb injectors, trick hot pipes/MP T76
They sense when the engine is making boost or at certain rpm levels
and increase voltage for that short time to increase pump output.
You dont want to increase pump voltage all the time, only when you
start to run out of fuel under normal conditions.
KenneBell really clued into this first with their "BoostAPump"
Its a great way to get an extra 10-20% out of a fuel pump for the short
burst you need from it "up top"
2002 Tahoe 4.8 - soon to be turbo'd - SOLD
1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
2012 Raptor - 497rwhp at 10psi
If you aint breaking - you aint going fast enough
My aeromotive fuel pump controller does the same thing basically.Boost voltage above 3 k rpm and pushes more fuel ,also doesnt make the f/p work as hard.bumps my fuel pressure 3-5 psi at 3k +.
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
I will be putting it up on ebay tomorrow if no one is wanting it.
2004 silverado rcsb 2wd cammed 6L, 3.42's, Hydroboost swap, 4l80e w/hd-2 and yank 3200, twin intank pumps, 60lb injectors, trick hot pipes/MP T76