[Hooter]

Looking to switch my 65 over to FAST XFI 2.0 fuel injection over the winter and would like to remove my current fuel cell from the trunk and go back with the stock style tank. Called Tanks Inc. and they have a set up that should work with a Walbro pump capable of handling 900hp. The question they couldn't answer for me was if the sump(see pic in attached link) which is in the front would prevent fuel starvation if less than 1/2 of gas with the car under hard acceleration at the track. Open for suggestions on the best way of getting the stock tank back under the car. With Drag Week, I'd like as much room for storing stuff as possible.

https://butlerperformance.com/i-2517...n-tm37h-t.html

[Tom Vaught]

Hooter, if you look at the last picture on the top row of your Butler link, you will see a cut-away of the baffle and the feed holes that are on the Baffle Plate on each side of the Gas Gage Sending Unit and Pump Assy.

Those holes are really not that big and the baffle runs basically full length across the tank from side to side. There may be some tiny gaps in the baffle to even out the tank fuel near the floor of the tank but that fuel would have a hard time getting to the rear tank portion quickly.

Looks like the large "balance fuel holes are at least two inches above the floor of the gas tank. Two inches across the width of the tank is a lot of fuel volume in the front baffled portion. They also say: "EFI style internal baffling. Extra Large 4.3 liter internal fuel tray to prevent fuel pump starvation."

4.3L inside a fuel tray is over a gallon of fuel close to the pimp pick-up. Assume the fuel tray is a couple of inches above the filter with a forward facing inlet.

Maybe 3 or 4 gallons of gas and the fuel pick-up is near the very bottom and in the center of the baffled area. I think you will be just fine.

I have a similar tanks inc tank for my 64 GTO.

Tom V.

[JLMounce]

I have a Tanks Inc. setup and I can describe how it's worked for me over the past 3 years. I'm no where near 900hp and I don't have the traction you have, so take that with a grain of salt.

The way the tank is designed is that there is a sump tray in the forward section of the tank that that is fed via a tube from the bottom of the sump, as well as from over the top of the sump at about 3/4's full. There is also a horizontal baffle that runs the length of the tank side to side that has slots on the top and bottom for equalization.

The way the tank is designed with both the overflow and tube fed sump means that the pump will always be submerged in fuel unless the tank is below an 1/8th of capacity. In fact, the way that the sender's are specifically used in the tank, your gauge would likely read empty prior to the fuel level lowering enough to uncover the fuel pump sock.

Additionally, the return line returns fuel back to the sump pan, so you have a 2nd fill source when the fuel level drops below the top lip of the sump pan. As a result, in no circumstance have I ever had a fuel starvation issue in my car and you would most certainly have more than enough fuel in the sump pan at all times for a 1/4 mile pass.

The only issue I've had with the tank is the cheap fuel cap that gets sent with it. When the tank is half or more full, there's enough fuel in the aft section that the cap won't completely seal the pump inlet and you get fuel slosh out the back end as a result. Forgo their cap and buy a quality Stant cap to solve that issue.

[Hooter]

Thanks guys. I kinda figured it might be fine, but wanted a couple other opinions. Really looking forward to getting my trunk back again.

[Tom Vaught]

Nothing like a High Flow Capacity EFI type system for a early vehicle.

I am working on packaging a Dual Phantom 400 liter/hr module inside my 64 GTO tank.
The system will run on one pump and then when demand requires the second 400 liter EFI pump will come on line.
I am picking EFI pumps designed for Ethanol and Gasoline type fuels because they are much more robust with those fuels.
The newer brushless type pumps last a lot longer too.

Lots of older EFI pumps were not compatible with ethanol fuels and cost the vehicle owners a lot of cash to have them replaced (on the 'Owners Dime').

Tom V.

[charlie66]

I dont know if you street drive your car but another problem that accures is when stopping hard . When the brakes are applied hard with having FAST XFI 2.0 fuel injection ( i have the same one ) Its will uncover the pickup as well and you will lose the fuel pressure which can make the motor stall on you.. To me that sock thing is a big question mark on whether is will or wil not work out for you.. As another option theres a nice weld-in fuel sump for a stock tank . Its made for fuel injection.. Just another option if you find this does not work out for you .. Heres a link if you would like to look at it... Its the one i use .. It works.....

https://www.summitracing.com/parts/a...a/instructions

[Hooter]

Hi Charlie. I run this car on Drag Week, so lots of street driving. With the pump in the front on these tanks, I didn’t think the issue you bring up would cause a problem? I was more concerned with starvation under acceleration uncovering it.

[charlie66]

Originally Posted by Hooter

Hi Charlie. I run this car on Drag Week, so lots of street driving. With the pump in the front on these tanks, I didn’t think the issue you bring up would cause a problem? I was more concerned with starvation under acceleration uncovering it.

Ih brad , I guess yours being in the front it wouldnt be a problem braking . I should of thought about that . Sorry..

But as for it being in the front accelerating on a half a tank with a sock? Doesnt sound too promising to me ... I can have a quarter tank and make a pass with no issues

[charlie66]

The problem with having fuel injection is as soon as 1 or 2 pounds of pressure is lost the motor will start to run really rough.. Its a whole new world from having a fuel bowl and losing pressure..

[charlie66]

Are you running a turbo or a blower now ?

[Hooter]

No power adder at this point. It’s a 521 that made 780hp on pump gas. Nothing extravagant. Just a street car.

[charlie66]

Oh i thought you were being you posted in the boost section.. But now that i look closer i see its for more then boost . lol

[ErikW]

My wife's TA uses the Tanks tank with no issues. We just make sure we top off the tank just before we get to the next track. Shouldn't be a problem.

[JLMounce]

No issues with fuel starvation on heavy braking with my Tanks Inc setup. I run pretty sticky summer performance tires with large-ish contact patches comparable to modern cars, with 4 wheel discs. I've had the car sees heavy braking and has been in a couple panic stop situations.