Will I need a external fuel pump? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skokie · 01-14-2007, 10:35 PM

When I install my fuel cell in between the frame rails will I need to install a external pump or will the fuel pump in the block do the job?

Thanks

abadsvt · 01-14-2007, 11:47 PM

I believe you will need a external fuel pump. I am not 100% sure but can't see why you wouldn't. Someone else will chime in with a better answere.

Josh

Longhorn Man · 01-15-2007, 12:06 AM

the one on the engine will be fine. The pump will never know the difference.

PumiceMan · 01-15-2007, 12:12 AM

I would think that if you're running a carbureted engine, the mechanical pump on the engine would be enough - normally electric pumps and pressure regulators are used more with EFI. I don't have much experience with fuel cells, though.
Maybe someone else can answer this one - Can you use a fuel cell without a return line? I always wondered how these work...

skokie · 01-15-2007, 12:26 AM

It is carbuereted. Forgot to mention that. Was thinking about that long of a run from the back of the truck to the front. Going to have to put in a fuel filter someplace. Maybe use the stock one about halfway.

PumiceMan · 01-15-2007, 12:35 AM

I know what you mean about the length of the run, but I'm thinking the suburbans just used the engine driven pump, and its tank is way back there. (right guys?)
I like having my filter close to the pump. On my camaro I've got a large clear one at the forward end of the hard line, then fuel hose to the pump. I've got a smaller clear one (glass, Mr Gasket I think) up by the carb. Overkill probably, but I have no idea what's in the tank!

Longhorn Man · 01-15-2007, 12:43 AM

install the filter after the pump.

skokie · 01-15-2007, 12:50 AM

I was thinking about using the stock filter somewhere down the frame rail in between the pump and the tank. Now all I gotta do is think of a way to make it stay in there

Longhorn Man · 01-15-2007, 05:45 AM

by doing that, you can induce vapor lock, or if you already have it, it'llmake it worse. I am not familiar with a stock filter on the frame.

cdowns · 01-15-2007, 10:01 AM

lookat suburbans and blazers and make your system like that /stock mechanical pump filter between the carb and the pump // good enough for the factory and reliable for 30-40 years why wouldn't it be good enough now??

01-14-2007, 10:35 PM	#1
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	Will I need a external fuel pump? When I install my fuel cell in between the frame rails will I need to install a external pump or will the fuel pump in the block do the job? Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

01-14-2007, 11:47 PM	#2
abadsvt Senior Member Join Date: Aug 2006 Location: Atascadero, CA Posts: 1,152	Re: Will I need a external fuel pump? I believe you will need a external fuel pump. I am not 100% sure but can't see why you wouldn't. Someone else will chime in with a better answere. Josh __________________ (Project truck) 1970 C10 under complete transformation My current build thread http://67-72chevytrucks.com/vboard/s...d.php?t=212871 Other project: C5 corvette swap into 70 c10 http://67-72chevytrucks.com/vboard/s...=1#post2413517 On Hold

01-15-2007, 12:06 AM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Will I need a external fuel pump? the one on the engine will be fine. The pump will never know the difference.

01-15-2007, 12:12 AM	#4
PumiceMan Junior Member Join Date: Jan 2007 Location: Wichita, KS Posts: 47	Re: Will I need a external fuel pump? I would think that if you're running a carbureted engine, the mechanical pump on the engine would be enough - normally electric pumps and pressure regulators are used more with EFI. I don't have much experience with fuel cells, though. Maybe someone else can answer this one - Can you use a fuel cell without a return line? I always wondered how these work... __________________ 69 GMC Sierra 1500 Custom 68 Camaro SS 18 GMC Sierra SLT Living the dream

01-15-2007, 12:26 AM	#5
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	Re: Will I need a external fuel pump? It is carbuereted. Forgot to mention that. Was thinking about that long of a run from the back of the truck to the front. Going to have to put in a fuel filter someplace. Maybe use the stock one about halfway. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

01-15-2007, 12:35 AM	#6
PumiceMan Junior Member Join Date: Jan 2007 Location: Wichita, KS Posts: 47	Re: Will I need a external fuel pump? I know what you mean about the length of the run, but I'm thinking the suburbans just used the engine driven pump, and its tank is way back there. (right guys?) I like having my filter close to the pump. On my camaro I've got a large clear one at the forward end of the hard line, then fuel hose to the pump. I've got a smaller clear one (glass, Mr Gasket I think) up by the carb. Overkill probably, but I have no idea what's in the tank! __________________ 69 GMC Sierra 1500 Custom 68 Camaro SS 18 GMC Sierra SLT Living the dream

01-15-2007, 12:43 AM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Will I need a external fuel pump? install the filter after the pump.

01-15-2007, 12:50 AM	#8
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	Re: Will I need a external fuel pump? I was thinking about using the stock filter somewhere down the frame rail in between the pump and the tank. Now all I gotta do is think of a way to make it stay in there __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

01-15-2007, 05:45 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Will I need a external fuel pump? by doing that, you can induce vapor lock, or if you already have it, it'llmake it worse. I am not familiar with a stock filter on the frame.

01-15-2007, 10:01 AM	#10
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Will I need a external fuel pump? lookat suburbans and blazers and make your system like that /stock mechanical pump filter between the carb and the pump // good enough for the factory and reliable for 30-40 years why wouldn't it be good enough now?? __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

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