Gas tank baffles
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Gas tank baffles
Has anyone welded baffles into their '75-'77 tank around the fuel pickup? I would like to install an in-tank pump for my FI conversion. The pumps with built-in reservoirs are a good option, but very expensive. I can get a 255 lph Walbro for about 1/5 of the cost of the Delco pump with reservoir. 
Pro
Joined: Oct 2002
Posts: 733
Likes: 15
From: Clarksburg NJ
I'm curious to see what feedback you get. I am running a stock tank with external pump on the inside rear frame rail. Replaced return line fitting on sending unit with -8an bulkhead fitting, and tubing into tank a ways to avoid aeration. Tried a '82 tank during construction, but different body than my '76. Always wanted to measure for a Summit pro street cell with foam, to see if it could be made to fit. Then there's that custom tank outfit, I think it's "Rock Valley" or something like that.
Le Mans Master
Joined: Aug 2003
Posts: 7,720
Likes: 12
From: Chattanooga TN
I am using an early tank with no baffle and an external pump on mine. I keep it above 1/4 and have never had an issue. It would be nice to have a baffle and an internal pump, but I don't know how you would do it (baffle) on a stock tank. You don't want to bolt it through the tank, and glue isn't going to hold inside. Also, physically getting in there is an issue. 82's don't have a baffle. I would just put the pump internal, and not worry about the baffle.
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
If I had any idea what baffles were supposed look like (I'm thinking of long L-shaped pieces of steel, with some spaces at the end for fluid to move around, I might be willing to tackle this...can't believe no one has done it with all the FI conversions around here.
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
I was planning on making the walls in an "L" shape, drilling some holes in the bottom of the tank, and plug welding them in. I'll have to shine a light in a couple of gas tanks next time I'm at the pick-n-pull.
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Race Director
Joined: Nov 2000
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From: Waterloo ontario Canada
Originally Posted by markdtn
Make sure you get all the vapors out. Welding is not generally recommended on a fuel tank.
I put 2 bottom takesoffs on both my tanks and silver braze them into place.
