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Another option is what I've seen in a few race Panteras: TWO separate rectangular cells, one on each side of the engine. The height was about 12" tall. Each held about 10 gallons and the wt & balance of the car was improved. The cells were connected by a 2" fuel-proof hose that ran in front of the engine so the car could be fueled from either side. You don't say but such a rig on a street car could be fitted with two senders and one gauge with a selector switch.
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Originally posted by David_Nunn:
The Triworks tank was designed, and the pieces laser cut, by Norberg Design. Triworks then welded the pieces together.

Norberg Design (@norbergdesign on Instagram) should be able to incorporate the addition of a bladder into the design then since the inner support spine will need to be deleted or modified. You will also need to use a different fuel sender design to work with the bladder such as one made by Centroid. Their Fuel Level Senders work by measuring capacitance so there are no moving parts involved. Electronics in the head convert this measured capacitance to the programmed output of ohms or volts. It was a subject of a previous topic on fuel sending units on this forum.

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quote:
Originally posted by LIV1S:...You will also need to use a different fuel sender design to work with the bladder...


Sorry guys, but I got a dumb question.

does a fuel cell bladder just line the tank, thus holding fuel and air, allowing the fuel to settle to the bottom of the tank as used

Or

Does the bladder expand and contract to hold only fuel and thus keeping the fuel at the same "level" as it is used
quote:
Originally posted by JFB #05177:
quote:
Originally posted by LIV1S:...You will also need to use a different fuel sender design to work with the bladder...


Sorry guys, but I got a dumb question.

does a fuel cell bladder just line the tank, thus holding fuel and air, allowing the fuel to settle to the bottom of the tank as used

Or

Does the bladder expand and contract to hold only fuel and thus keeping the fuel at the same "level" as it is used


Hello JFB; You were very helpful in the generous giving of your time, so I'm returning the favor.

Here you go,

https://www.youtube.com/watch?v=GwXuqWvCrwU
In most fuel cells, irregular chunks of open-cell foam are forced into the tank openings, thus restricting fuel slosh without the need for metal baffles. Gasoline eats any foam up over time, so in most cases, the chunks are pulled back out and new foam is added. Otherwise, small bits of foam begin to get into the fuel lines and plug things up. Foam replacement is a messy, sort-of-dangerous job especially for those with chemical allergies. May be best done by the cell mfgr.
ATl manufacture custom fuel cells, they have a formed bladder that requires no tank, purely a rated cell and told me they could do a Pantera tank soem years back.

Fuel Safe have manufactured Pantera fuel cells to roughly the same dimensions as a Pantera gas tank; volume is about 1.5 gallons less due to slight dimensional changes and the foam etc. Dennis Quella has the rights to the design and order has to go through him, cost was about $2500

Julian

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If no CAD file readily available, then consider getting your existing tank 3D scanned and converted to CAD, the cost is relatively minor these days.

I have a fuel cell (unused) that will be going up for sale as soon as I can dig it out for photos.

I had a tank build to my specification in the UK by Alloy Racing Fabrications. The tank is about 65-70 liters, sits in the original position in the car and is foam filled. It conforms with FIA app. K class H1 which requires foam filled tanks. It is smaller than the original, but I'll only use the car for shorter sprint races. Price was about euro 900 incl. shipping to Denmark.

I do not have a CAD, but made af drawing in Word grids, which worked fine. They did a fantastic job exact to my measurements.

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Last edited by push1267

Push, that's a nice looking tank. The OP didn't specify what year his Pantera was. Note that on pushbuttons, the upper part of stock gas tanks were different shapes than in '71-up production Panteras. For instance, Ted Mitchell found that the stock alloy tank from his '71 pushbutton would not fit in his '74 since the upper left chassis subframes were different. The right side subframe was not checked but was likely different as well. To make the early tank fit the later car, Ted had to cut the whole upper section off, modify it to fit, then reweld the parts. Quite a bit of work for a 6 lb weight loss with about the same 21 gal fuel volume. This was subject of a POCA Newsletter article in April 2011.

The early and later Illustrated Parts Manuals shows different part numbers for the various formed steel beams that make up the rear frames, for different years. The long tank retaining strap was also a different length. So your dimensions may be of limited value to most other owners.

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