Fuel Pump Location for my swap?
Thread Starter
Burning Brakes
Joined: Oct 2010
Posts: 1,192
Likes: 7
From: Wentzville MO
Fuel Pump Location for my swap?
Swapping LS in my 78 vette. I have a lot of room behind the front passenger fender well since adding the vintage air. I need to run a bigger line 3/8 from the tank to the engine anyway? I can then use the original fuel line as the return to tank. This would provide a little better access to pump and regulator if I have fuel problems down the road.
Does the fuel pump have to be located back by the tank? That seems to be the most common but why?
I am also adding the Corvette regulator filter. Would an additional fuel filter harm flow if added back by the tank?
Does the fuel pump have to be located back by the tank? That seems to be the most common but why?
I am also adding the Corvette regulator filter. Would an additional fuel filter harm flow if added back by the tank?
Pro
Joined: Jun 2004
Posts: 543
Likes: 2
From: Miami FL
St. Jude Donor '11, '14
EFI pumps do not like to draw (suck) They are best kept close to the tank and below the outlet so that they are gravity fed. We just finished an EFI conversion on a 72 Coupe and used an LS1 Camaro fuel pump module with a flange kit from VetteWorks.
Rob
Rob
Racer
Joined: Nov 2011
Posts: 285
Likes: 36
From: Cedar Park TX
Put the pump in the back; make sure it has a pre (100um) and post (10um) filter. Proper size filters will not hurt the flow of fuel.
IMO, the fuel regulator should be after the fuel rails to ensure proper pressure
Enjoy
Burning Brakes
Joined: Sep 2006
Posts: 1,071
Likes: 86
From: Rotonda FL
The pump need to be lower than the tank and as close to it as possible.
I originally mounted an external pump to the right rear frame rail for my TPI. It worked well, but I was not happy with the noise/vibration (I used all of the supplied rubber mounts and foam sleeve).
I was eventually annoyed enough that I dropped the tank and installed an in-tank pump. (If interested, see my write-up with photos on the Forum). Your 78 tank matches the configuration of the 82, that came with an in-tank pump. With an LS swap, you're already spending a lot of time and money - get the 82 parts, put it into the tank, and do it right.
I originally mounted an external pump to the right rear frame rail for my TPI. It worked well, but I was not happy with the noise/vibration (I used all of the supplied rubber mounts and foam sleeve).
I was eventually annoyed enough that I dropped the tank and installed an in-tank pump. (If interested, see my write-up with photos on the Forum). Your 78 tank matches the configuration of the 82, that came with an in-tank pump. With an LS swap, you're already spending a lot of time and money - get the 82 parts, put it into the tank, and do it right.
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Thread Starter
Burning Brakes
Joined: Oct 2010
Posts: 1,192
Likes: 7
From: Wentzville MO
Will consider this in tank pump. http://www.vetteworksonline.net/cata...roducts_id=108
Why should I run a new fuel line up front when the old steel line looks ok. I can run some cleaner through it nd add a filter on the other end.
Why should I run a new fuel line up front when the old steel line looks ok. I can run some cleaner through it nd add a filter on the other end.
Last edited by donnie1956; Feb 9, 2013 at 09:25 AM.
Burning Brakes
Joined: Oct 2008
Posts: 1,037
Likes: 14
From: Mobile Alabama
Will consider this in tank pump. http://www.vetteworksonline.net/cata...roducts_id=108
Why should I run a new fuel line up front when the old steel line looks ok. I can run some cleaner through it nd add a filter on the other end.
Why should I run a new fuel line up front when the old steel line looks ok. I can run some cleaner through it nd add a filter on the other end.
You can use the stock line, but the connections and flexible line need to be rated much higher than stock, ~60psi if after the regulator, or ~100psi if before regulator. I used stock late model nylon fuel lines.
Thread Starter
Burning Brakes
Joined: Oct 2010
Posts: 1,192
Likes: 7
From: Wentzville MO
Going to use the dorman 3/8 nylon line and the vetteworks fuel pump adapter for LS.