double pumps

[figga8n]

ltb double pumper

 

[Rosewood T-Type]

Why dont you make your own it is much cheaper. All you need is two pumps and a y fitting that full throttle sells.

 

[figga8n]

Pumps

Why dont you make your own it is much cheaper. All you need is two pumps and a y fitting that full throttle sells.

more info please

 

[Rosewood T-Type]

more info please

Like I said just attach both pumps w/ a y fitting in the tank and wire both pumps to a hot wire kit.
The pumps will both run all the time (unlike a dp kit which will have a hobbs switch to turn on 2nd pump at a set boost level) With a return fuel system the unnecessary fuel will be returned to the tank.

The reason for a hobbs switch is to extend the life of the 2nd pump by not running all the time. 2 new 340 pumps should last as long as your factory pumps did. Like 20 years!

Doug

 

[figga8n]

Like I said just attach both pumps w/ a y fitting in the tank and wire both pumps to a hot wire kit.
The pumps will both run all the time (unlike a dp kit which will have a hobbs switch to turn on 2nd pump at a set boost level) With a return fuel system the unnecessary fuel will be returned to the tank.

The reason for a hobbs switch is to extend the life of the 2nd pump by not running all the time. 2 new 340 pumps should last as long as your factory pumps did. Like 20 years!

Doug

do you have any pics of this setup?

 

[DR BOOST]

Like I said just attach both pumps w/ a y fitting in the tank and wire both pumps to a hot wire kit.
The pumps will both run all the time (unlike a dp kit which will have a hobbs switch to turn on 2nd pump at a set boost level) With a return fuel system the unnecessary fuel will be returned to the tank.

The reason for a hobbs switch is to extend the life of the 2nd pump by not running all the time. 2 new 340 pumps should last as long as your factory pumps did. Like 20 years!

Doug

do you have this system on your car?

 

[Rosewood T-Type]

I do not have any pics of the setup I made, It is very simple to do though. The hardest part was coming up w/ a y fitting, Then I found out that fullthrottle sells them. Just strap the pumps together w/ a plastic tie strap.

I ran this setup on my car for over a year w/ no issues whatsoever.

Harley Davidson p/u trucks have a very similar setup. Two pumps full time.

Doug

 

[figga8n]

pumps

I do not have any pics of the setup I made, It is very simple to do though. The hardest part was coming up w/ a y fitting, Then I found out that fullthrottle sells them. Just strap the pumps together w/ a plastic tie strap.

I ran this setup on my car for over a year w/ no issues whatsoever.

Harley Davidson p/u trucks have a very similar setup. Two pumps full time.

Doug

thanks for the info. I'll be ordering parts tomorrow

 

[HP Man]

I personally like the Hobbs setup, why run both pumps all the time. It can be set to run the second pump at 15+ lbs of boost. I ran two seperate feed wires or trunk mounted relays. 10 ga wire is a must, ran it through the frame rails back to the pumps, plus added a good tank ground wire. Factory wiring is barely adequate for the stock pump. Fuel supply is critical to prevent a Lean Out and engine damage. HTH Gene

 

[Rosewood T-Type]

Like I said just attach both pumps w/ a y fitting in the tank and wire both pumps to a hot wire kit.
The pumps will both run all the time (unlike a dp kit which will have a hobbs switch to turn on 2nd pump at a set boost level) With a return fuel system the unnecessary fuel will be returned to the tank.

The reason for a hobbs switch is to extend the life of the 2nd pump by not running all the time. 2 new 340 pumps should last as long as your factory pumps did. Like 20 years!

Doug

You dont have to have the hobbs switch was my point. as I stated above you should use a hot wire kit.
You can always put a hobbs switch on if you want but its not necessary with a return style fuel system. All the hobbs does is extend the life of the second pump, Even if it is a daily driver the pump should last 100k or more.

I personally think the hobbs is unnecessary, Just one more thing to go bad. With 2 pumps running all the time there is a lot less chance of leaning out. JMO

Doug

 

[dentmasters01]

what does this "y" look like?

 

[ronbuick]

more info on this Y fitting please, or a part number would also be nice, and I was thinking why not use two 190lph pumps instead of two 255lph unless you need all that fuel, that would give you about 380lph or so with a hot wire set up, just asking and a little bit curious also, thanks.

Ron

 

[BLACK MAGIC RACING]

You dont have to have the hobbs switch was my point. as I stated above you should use a hot wire kit.
You can always put a hobbs switch on if you want but its not necessary with a return style fuel system. All the hobbs does is extend the life of the second pump, Even if it is a daily driver the pump should last 100k or more.

I personally think the hobbs is unnecessary, Just one more thing to go bad. With 2 pumps running all the time there is a lot less chance of leaning out. JMO

Doug

If both pumps are running full time, i would guess that the factory return line wouldn't be adequate to return that much fuel, and excess pressure would build up in the fuel rail, causing a rich condition, no?

 

[HP Man]

If both pumps are running full time, i would guess that the factory return line wouldn't be adequate to return that much fuel, and excess pressure would build up in the fuel rail, causing a rich condition, no?

My point exactly, under 15# of boost, one fuel pump is adequate. Running both pumps only heats the return fuel and places the FP reg under strain. Running larger fuel injectors is the real ticket as the new open loop ECM controller works great. My 72# injectors idled down to under 450 rpm just fine. (setting IAC the old fashion method) Gene

 

[XSboost]

just posted a double pumper for sale

 

[8urV8]

Just by chance I was curious on the post because getting to the point where I have to install double 340's as well.I don't want to spend a grip on the setup as well. Looks like the same setup as my 02 lighting.I got my Y in stainless steel and is 5/16th "I bought this through Lightning Force Performance $24 I also went to Napa to get submersible fuel line hoses.So that fuel lines disintegrate in the tanks. Buick and my L have the same concept I through in some pics of the L setup.They look similar is there any info watch out when doing this or pretty much common sense.

 

[ronbuick]

8, is that a Buick set up you have pictured?? I beleive I will try that Y set up, any one know if that is the same one that Mike sells??
thanks

Ron

 

[ronbuick]

Just got the hose from NAPA, I about dropped a load in my pants, 24.00 for the hose that 8 shows, must have to do with being gas proof both ways, ie:
inside and outside versus just inside out, who knows.

Ron

 

[XSboost]

looks like it would work just fine but if you run both pumps at the same time you will raise the fuel psi at idle or normal driving. because the stock return line is to small, if you change the return line to a -6 you will be fine or run a hobbs switch to engage the second pump. Unlike the lightnings with a returnless fuel system

anyway good luck and happy motoring