BBC Elec Fuel Pump or Keep Mechanical
Thread Starter
Pro
Joined: Nov 2008
Posts: 680
Likes: 5
From: Denham Springs LA
Driveshaft,
Engine made max 515hp around 5800 rpm. I forgot dyno sheets at work. I'll post them tomorrow.
I want to compare new numbers (hydraulic roller) to my old numbers (solid roller). Chris said max hp would be a little lower but power curve (average hp and torque) would be wider or maybe flatter if I am saying this right.
Dyno operator said hp curve was nice and smooth, engine idled and ran really good.
My air cleaner cost about 4 peak hp, not too bad in my opinion.
My Open Hooker side pipe headers (2" diameter) cost about 9 peak hp compared to their 2" diameter tuned headers.
I couldn't test my side pipes, Dyno shop couldn't hook them up to their exhaust tubes to get fumes out of the building.
I like the Holley 180 fuel pump that doesn't need a regulator.
Roger
Engine made max 515hp around 5800 rpm. I forgot dyno sheets at work. I'll post them tomorrow.
I want to compare new numbers (hydraulic roller) to my old numbers (solid roller). Chris said max hp would be a little lower but power curve (average hp and torque) would be wider or maybe flatter if I am saying this right.
Dyno operator said hp curve was nice and smooth, engine idled and ran really good.
My air cleaner cost about 4 peak hp, not too bad in my opinion.
My Open Hooker side pipe headers (2" diameter) cost about 9 peak hp compared to their 2" diameter tuned headers.
I couldn't test my side pipes, Dyno shop couldn't hook them up to their exhaust tubes to get fumes out of the building.
I like the Holley 180 fuel pump that doesn't need a regulator.
Roger
Last edited by roger3; Feb 10, 2013 at 09:05 AM.
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
It takes roughly 1/2 lb of fuel per hp to satisfy your requirements. So for 520 hp, you should need 260 lbs per hr.
Gasoline weighs about 6 lbs per gallon, so you'll need a minimum of 44 gph at a usable pressure.
Of course you also want to account for a safety factor, so you'll want a pump that exceeds those requirements by at least 25%.
The standard Holley 170 gph pump flows (per Holley) about 80 gph @ 4.5 psi by 5000 rpm, so that should be almost twice the volume that you'd ever need.
I dont think you would need more pump that that, but if you would like even more safety factor-
The Holley HP 170 gph billet pump will put out about 85 gph @ 5psi by 5000 rpm and is well over 100 by 6000.
Gasoline weighs about 6 lbs per gallon, so you'll need a minimum of 44 gph at a usable pressure.
Of course you also want to account for a safety factor, so you'll want a pump that exceeds those requirements by at least 25%.
The standard Holley 170 gph pump flows (per Holley) about 80 gph @ 4.5 psi by 5000 rpm, so that should be almost twice the volume that you'd ever need.
I dont think you would need more pump that that, but if you would like even more safety factor-
The Holley HP 170 gph billet pump will put out about 85 gph @ 5psi by 5000 rpm and is well over 100 by 6000.
