Stocker Tech Rules Gas Tank & Battery?
 

If you use a stock mounted battery location are you allowed to modify the tray and hold down to prevent the battery from tipping or moving around? Lastly if you use a stock tank can you modify it too for a sump and smaller actual tank capacity? If not can you use it to cover the bottom half of the fuel cell so it still looks stock from behind and underneath? Thanks in advance for the input.

Re: Stocker Tech Rules Gas Tank & Battery?
 

Yes to battery mounting. In fact you need 3/8 metal holddowns and to replacethe open J hooks that are usually the factory mounting. I have never heard of the gas tank sumps being illegal.....but why not have the safety of a fuel cell instead of all that work on stock tank?

Re: Stocker Tech Rules Gas Tank & Battery?
 

Re: Stocker Tech Rules Gas Tank & Battery?
 

Based on the rule, he could probably use the material from the bottom of the OEM fuel tank to fill the hole vacated by replacing it with the fuel cell. Use the bottom of the tank as the "equal or greater thickness" fill material. This is Call the Tech stuff, though.

Dale

Re: Stocker Tech Rules Gas Tank & Battery?
 

rboyle,

Save yourself a lot of time & money ? Call Ryck Campbell @ 315-335-8295,
7-9 PM Mon-Thurs. He will help you with the right answers , he's the Div. 1 tech guy .... Do it right the first time, its much cheaper !!! LOL

Re: Stocker Tech Rules Gas Tank & Battery?
 

IF OEM tank is used it MUST remain UNALTERED,,, seems simple to me.
Danny Durham

Re: Stocker Tech Rules Gas Tank & Battery?
 

the way I read the rule is if using a stock tank you are only allowed 2 MODIFICATIONS to the tank you can RESIZE the fuel line & the pickup--- it says nothing about sump areas in a stock tank being allowed that I would consider a modification--- NO OTHER MODS ALLOWED--- now if you use a fuel cell many times a sump area will be molded in as part of the design so you will be OK and in addition you must fabricate a metal barrier between the cell and the passenger area---my take on it-- FED387

Re: Stocker Tech Rules Gas Tank & Battery?
 

I hear you,, if you're going to resize both the fuel line and pickup,, you'd want the correct fittings to finish the resizing,, therefore modifying part of the tank,which is not allowed, so they've created a "grey area" once again, in rules interpetations. I'm not going to tell anyone how to construct their own car,, but if its me,, I'm going with a fuel cell, putting this behind me and moving on to the next area of construction. My 2 cents.
Danny Durham

Re: Stocker Tech Rules Gas Tank & Battery?
 

No comment on part 3 so here's mine:
Gas tank shields were used as far back as the 60's..sometimes as a good way to add weight
(C/FX cars, etc.)
I don't see any good reason why you couldn't fab one out of a gutted oem tank, and securely mount it to shield the bottom of the fuel cell and it's fuel lines.
Of course if you ask ,rather than just doing it, I'm sure the answer would be no.

Re: Stocker Tech Rules Gas Tank & Battery?
 

Saw this installation at a cruise night. Pretty scary.

On a car where the factory gas tank is the trunk floor, do they require you to install a metal barrier?

Re: Stocker Tech Rules Gas Tank & Battery?
 

I ordered a 5 gallon aluminum tank with a sending unit so the original gauge can still work again. Question on the drivers barrier, my car is a hatchback Nova with a trap door where the spare tire used to be recessed about 4". If we cut the tank into the floor cover the bottom of the hole with sheet metal welded in, is the trap door in the floor considered a firewall barrier for the drivers compartment?

Re: Stocker Tech Rules Gas Tank & Battery?
 

Be sure the impedance of the tank sender matches the range of the gauge you are going to use. I had a 0-90 sender and a 90-0 gauge. The gauge read backwards...:o

The rule says the cell must be isolated from the driver's compartment. That usually is a wall of some sort, so ask your local tech before cutting anything. There are smart people here, but it's still just a forum. Techs can bounce you at the gate and "Class Racer told me it's OK" won't float.

Dale

Re: Stocker Tech Rules Gas Tank & Battery?
 

We can run a fuel cell, but cannot sump the oem tank?...Wait...What?

Re: Stocker Tech Rules Gas Tank & Battery?
 

I run a 76 Nova Hatchback, I had a sheet metal box made and cut a hole in the the cover. the box is on a hinge in the rear and dzus fastners in the front. The fuel cell is mounted on brackets on the trunk floor. I used weather stripping to make sure there is a good seal all around the cover and the box.
If you want I'll take some pictures this week of it

Bill

Re: Stocker Tech Rules Gas Tank & Battery?
 

That would be helpful. Thanks.
Rich

Re: Stocker Tech Rules Gas Tank & Battery?
 

Yes, any modification to the stock tank is prohibited. "Back in the day", many "modified" tanks were turned into dual area tanks allowing approved fuel in one tank and "un-approved" fuel in the other tank.

Besides, why would you go through the trouble to modify a tank? Most are rusty inside and out....so...you need to buy a new one. Then all the work to hack it up?

Cells are cheap and easy to install. Cells can be poly or aluminum. They can have any size or quantity of outlets and return ports. They come in many shapes and gallon sizes. They can be installed with the built in sump protruding through the floor. They are simply a win-win item. Not to mention there is no fuel spilling out the fill neck on a hard launch and no need to carry 15 gallons to ensure the pickup tube stays covered. Who remembers seeing hard leaving cars pour fuel out on a launch?

Just remember:
The cell must have a ground strap from one of the fuel cap mounting screws down to the body or frame. If your original tank was part of the floor, you must close the floor with metal. The area directly behind the rear seat must be sealed with a sheet of metal or aluminum (for cars with an actual trunk). If you have a hatchback style car, the cell must be sealed in a box or a trunk like area must be built for the tank to be inside of. Just think of it this way, the cell must be in a sealed compartment and the driver must be separate of that sealed compartment.

Re: Stocker Tech Rules Gas Tank & Battery?
 

Bob, you are almost right. The requirement for the grounding wire from the filler to the car does not apply to aluminium tanks.

Re: Stocker Tech Rules Gas Tank & Battery?
 

painter -----still wouldn't hurt --only take about 2 minutes to fab one up

Re: Stocker Tech Rules Gas Tank & Battery?
 

Bob is correct.

In D5 it does. As I had to install a ground wire on my aluminum cell. The point the tech made was there is a gasket between the filler and the cell. It was not worth arguing about, so I installed a ground on the cell. Although the bolt that secures the filler to the cell contacts the cell and filler, and my cell is bolted directly to the floor of the car.

Sean

Re: Stocker Tech Rules Gas Tank & Battery?
 

Does the ground wire for the fuel sender fill this requirement? It grounds the cell to the frame on my car.

Dale

Re: Stocker Tech Rules Gas Tank & Battery?
 

Dale,

If it is clearly visible to tech, I would not think it would be an issue.

Sean