'Fuel pump...you running one or two for FI?

**maxgee** · 01-14-2009, 12:01 PM

I've been running one Walbro for my set up front mount 8psi.
Was told I should run 2 as there's a fuel pressure drop with just one.
Anyone with this experience? and what are you running 1 or 2?

**AFASTYZFR1** · 01-16-2009, 07:17 PM

I am running two pumps......second one is on hobbs switch

**marksls1ta** · 01-16-2009, 09:25 PM

same here i am running a dual intake setup with second pump on hobbs switch.

**cailey37** · 01-17-2009, 10:45 AM

I'm running one external aeromotive pump.....

**TNTramair** · 01-20-2009, 11:18 AM

+1 on the 2 intank Racetronix pumps with a hobbs switch. on 1 pump you may experiance some pressure drop at higher rpms.

**Frost** · 01-20-2009, 12:37 PM

I run two and regularly set up these systems as such.

We sell a Hobbs switch without the exposed terminals... a nice weather tight connector. Here is our list of Hobbs switches and accessories:
http://www.lsxtune.com/shop/index.php/cPath/129_174

**9t8z28** · 01-20-2009, 06:05 PM

Originally Posted by Frost

I run two and regularly set up these systems as such.

We sell a Hobbs switch without the exposed terminals... a nice weather tight connector. Here is our list of Hobbs switches and accessories:
http://www.lsxtune.com/shop/index.php/cPath/129_174

What does the hobbs switch do?

***Ed Blown Vert*** · 01-20-2009, 06:22 PM

Racetronix Twin In-Tank Pumps

**Frost** · 01-20-2009, 06:55 PM

Originally Posted by 9t8z28

What does the hobbs switch do?

It lets you run a single pump until you go into boost and then it switches on the second pump.

**9t8z28** · 01-20-2009, 07:00 PM

Originally Posted by Frost

It lets you run a single pump until you go into boost and then it switches on the second pump.

So at what point is 2 pumps necessary? I am running 8# at 480rwhp. I do not notice my pump flinch once.

**Tman** · 01-24-2009, 03:30 AM

Two pumps...stock and a Racetronics outside booster

**qwkgto** · 01-26-2009, 09:45 AM

Originally Posted by maxgee

I've been running one Walbro for my set up front mount 8psi.
Was told I should run 2 as there's a fuel pressure drop with just one.
Anyone with this experience? and what are you running 1 or 2?

I have the nasty twin in tank pumps ,i am running 13-15 psi would not go any higher on one pump then 6-8 psi not a good thing.

**mistermike** · 02-19-2009, 07:57 AM

I'm running a single Mallory pump

It's 160 GPH and driven by two Hobbs switches and a PWM controller, giving 3 speeds of operation "idle/light cruise," "power enrichment," and "break something."

I chose this type because:
1. It's external. I dislike in-tank pumps.
2. It's a gearotor type, quieter and more reliable than vane or turbine pumps. Completely rebuildable.
3. It does not use the fuel for cooling itself, saving your octane for the motor to use.

**maxgee** · 02-20-2009, 02:58 AM

Originally Posted by Frost

I run two and regularly set up these systems as such.

We sell a Hobbs switch without the exposed terminals... a nice weather tight connector. Here is our list of Hobbs switches and accessories:
http://www.lsxtune.com/shop/index.php/cPath/129_174

i got my second pump and found a thread on another forum how to mount it. curious, to know how to run the hobbs? i saw the switches on your site.