Parallel vs. dead head

[ss dave]

Up date, I pulled the Aeromotive pump and replaced it with the largest Bosch pump made, 300lph, more than enough for my LS7. In fact Holley states it would be good for over 800hp.
Now, with limited test time, I'm not starving the pick-up, but get fluctuations at 3/4 WOT. The pressure will drop 8-10 psi.
We think a vacuum regulator will help, as opposed to my current Weldon, but I won't know for probably two months, when I finish upgrading the rear suspension and stuff!

The stock 2008 LS7 pump flows minimum 188lph @ 52.9 psi @ 12v
Walboro GSS340 255lph = 67gph = 404 lbs good for 800hp
Bosch 044 300lph or 80 gph @ 72.5 psi better yet.
Quieter than my A1000, probably cooler too.