The TNT ( tank-in-tank) fuel starve ELIMINATOR supersedes our "BIGFOOT" design. The "BIGFOOT" worked fine but was difficult to construct with precision and did not meet cost objectives.
The TNT design is based on our proven autoX car custom unit that has worked flawlessly for two years. We regularly run our tank down to 1-2 gallons (start with 5 gallons).
TNT features:
1. Totally reversible...no mods to your current setup.
2. Easy install through OEM tank opening.
3. "ALWAYS" keeps 2 liters of fuel at the pickup.
4. Adaptable to any known pump(s) setup.
5. Guaranteed to eliminate fuel starve or you may return for full refund.

Price projection:
1. Base Model (pic#1)
Includes all needed hardware,lines,check valve and sock. Designed for out-of-tank fuel pump setups that we believe is the optimum for easy pump maintenance.

2. Custom Model (pics #2-3)
Includes custom line fittings for your in-tank pump(s).

If the interest is there HPP will make.
Jim and Carter T

 

The pics.

#1. Base Model prototype for out-of-tank pumps
#2. Custom Model for in-tank pump(s)
#3. Custom Model shown installed in our old half-tank...now used for design work.

 

Jim,

After review this new updated/revisioned "Big foot". It might probably one of the best in-tank mods.

It'll be perfect if this can be used in conjunction WITH the CJ Motorsports dual pump assembly.

Any thoughts about that? It'll be awesome if it works with that kit. I'd personally rather have this than the hyperion fuel surge tank covers.

-Eric

 

cool to see the evolution of the design. I'm assuming I'm looking at this correctly and the TNT is filled by the return line to the main tank?

Completely trivial question, but will this help with consistency/accuracy of the gas gauge at all? It's annoying when you go out on track with close to 1/2 tank and after a few turns it reads almost empty from the slosh.

Either way, I'd be in for an in-tank pump version.

 

Wouldnt the accuracy/consistency a problem of the float or your gauge? Because if the float/level sensor is ok inside tank, EVEN after running at the track for few session it wouldnt change the level right?

Correct me if I am wrong.

-Eric

 

Here's the evolution of the TNT design in the quest for a bullet proof FD fuel starve eliminator for really high g autoX and track use. .

1. We started with the stock tank and the purchased plastic tray ( baffle) cover hoping to reduce fuel load by 50 lbs...run with 1/4 tank. FAIL...still had to run 3/4 tank to prevent fuel starve.
2. Next we modified our stock tank to a half tank and retained the tray cover. FAIL..still had to run at 3/4 tank to prevent starve. Did achieve a significant weight reduction but we were still concerned about fuel starve on long high g sweepers.
3. We built a custom 5 gallon tank with a center baffle, used the stock pump assembly bulkhead and mounted our Bosch 044 outside the tank ( under the black plastic DS dust cover which puts it a bit below the tank ). To our amazement we still had fuel starve under 3/4 tank.
4. Finally we designed a 2 liter collector tank fed from the return line and a check valve hoping to keep 2 liters of fuel always available to the pickup. It worked. We start with 5 gallons and regularly run the tank down to 1-2 gallons. See pics.

The TNT is the same design adapted to the stock FD tank.
Holler with questions.

 

Eric ....we see no reason why the TNT cannot work with the CJM twin pump. Will require a custom mounting bracket (will get get some dimensions from CJM for this) and custom return and pump lines/fittings...no big deal.

 

1.The TNT does receive all the return line fuel but the all important "refill" is supplied by the check valve. The check valve used is a very responsive ball valve that is actuated by TNT vs main tank pressure differentials.
2. The TNT should not effect the gas gauge operation because it retains all the stock components.

 

I'm in if it works with my CJ dual walbro fuel pump hanger.

 

As mentioned above, we see know reason why the TNT cannot be adapted to the CJM twin pump and we have it on our list of needed custom fitments.

 

It looks like this design won't affect the issue I'm having which is fine, it's just an annoying side effect of the slosh.

My gauge and sender are working fine, but what happens out on track is that with the fuel sloshing back and forth the gauge is innacurate when you get near or below 1/2 tank. After a couple of laps the sender is bobbing up and down and with the delay to the gauge will read lower than it actually is in my experience. I won't be able to get the proper fuel level until I've stopped and let the gauge catch up (there seems to be a delay in the signal, probably designed this way). What that means is that it's really tough for me to see how much fuel I actually have in the tank WHILE out on track.

I've had a couple of times where I came in early because the gauge read completely empty, but then after I stopped and let things settle I actually have more than a 1/4 tank.

 

You should consider getting an aftermarket gauge and tap the signal coming from the factory sender, this way you can have a real even a digital readout and check those on the straights!

 

This can work with a rotary performance pump correct?

 

Any pump that mounts on the stock stalk should fit with no issues.

 

The TNT ( tank-in-tank) fuel starve ELIMINATOR supersedes our "BIGFOOT" design. The "BIGFOOT" worked fine but was difficult to construct with precision and did not meet cost objectives.
The TNT design is based on our proven autoX car custom unit that has worked flawlessly for two years. We regularly run our tank down to 1-2 gallons (start with 5 gallons).
TNT features:
1. Totally reversible...no mods to your current setup.
2. Easy install through OEM tank opening.
3. "ALWAYS" keeps 2 liters of fuel at the pickup.
4. Adaptable to any known pump(s) setup.
5. Guaranteed to eliminate fuel starve or you may return for full refund.

Price projection:
1. Base Model (pic#1) $270
Includes all needed hardware,lines,check valve and sock. Designed for out-of-tank fuel pump setups that we believe is the optimum for easy pump maintenance.

2. Custom Model (pics #2-3) $295
Base Model plus custom line fittings for your in-tank pump(s).

If the interest is there HPP will make.
Jim and Carter T

Just got reminded that we forgot to include prices in our projections....added above. Sorry about that

 

interested in this. I run dual supra pumps. I only drag race and have to run 10+ gallons to solve the starvation on hard launches.

How long to pruduce? Was getting ready to sump the tank and go external.

 

Glad to hear from a drag racer. We don't know enough about drag application needs but we do know that the TNT works for Pro Solo launches....we launch with the tree and run flat out well into 2nd gear then turn left or right and autoX from that point on....no fuel starve. Will pm you to discuss specific drag racer needs.

 

I would be interested too

 

Hey Costas.....glad you are interested and hope all is well in Cyprus. Also trust you got all your money out of the banks....just stuff it in the FD rear bins,much safer there lol.

 

Im interested in this, how much would intl shipping be?

 

[QUOTE=rovers;11435001]Im interested in this, how much would intl shipping be?[/QUOTE
The TNT will be shipped in a USPS Priority Mail medium flat rate box....cost for Sweden is $59.95.

 

Current INTERESTED list

Feel free to edit as needed:

1. AzEKnightz...............CJM dual pumps
2. Smokey The Talon.......in-tank
3. FC3S1991..................CJM dual Walbro
4. Genzer.......................Rotary Performance pump
5.SK8WORLD...................Dual Supra pumps
6. R-R-RX7
7. ROVERS

 

I actually had to go back and save whatever i could.. i came back fruitless
Yeah either in the bins or under the pillow, safest place for the time being

let me know when this is ready, you have proven that the parts you make are great so why not try this too ?

 

TNT fitment checks are progressing well. Have to verify that all the pieces/parts will install through that little hole on the top of the stock tank. Should have pics next week.

 

id probably end up getting one for in tank walbro 485 e85 pump