and not just a sump! anybody tried actually making a tank larger, changing size, etc. I am in need of a larger tank for a race car, and the factory tank is very odd shaped, and having a cell made to fit is going to be very tough. I did the solid model of it, and it has a ridiculous number of pieces- so I just want to add a small portion on to the stock tank

thanks!

 

Have you checked out Jay Billingsly? I know he use to sell a nice aftermarket piece that I was actually gonna buy a few years ago.

 

What's the tank made out of?

I don't really see the problem, you could weld on some fittings and just add another smaller tank. Attach a couple of lines in between the 2 tanks and position the second tank somewhere in the lower middle of the first. You have to make sure that it is low enough to be filled completely but high enough that it isn't storing fuel when your primary tank is about to run out.

Maybe it's more complicated than that on a racecar, rules being what they are, but that is how I would do it.

Jeremy

 

A couple of possible problems. Don't see how you are going to be able to add enough volume by welding to an existing tank. And then of course you have to weld to the fuel tank, which can be hazardous to your health.
On my 84 I dropped the stock tank and cut out the trunk/storage area behind the axle and installed a 30gal. fuel safe cell there, aka NASCAR style. It's really a nice install. However if you don't wish to cut up your car you could easily ad an auxilary cell and pump in the storage area. When your tank gets low fip a switch and pump from the aux tank. I would use it to simply refill my stock tank, but you could plumb it into the fuel system too.

 

i cant cut the unibody(rules).

I went ahead and decided to go with a custom cell with a bladder for safety. I have it drawn up in solid works and am going to verify physical fitment with a project board model, and then send it off to fuel safe to be built.

 

try i believe rock valley they custom make tanks for custom and stock apps

 

Summit makes a fuel cell that will fit right in the well in the rear of our cars, plumb it to fill into the factory tank.


David