That's a good question - the original bladders have been out of production for quite a while, and most people just install replacement tanks without them.

 

I like the speedway tank because I can put the holes where there won't be any alignment/fitment issues.

Is the gas gauge on a 68 a 0-90 ohm?

 

First... Foam in a stock tank... Dunno all the details but I do know if you can't get your hand in the tank to position the foam your out of luck unless you're very creative or an endoscopic expert. It comes in blocks of various sizes.

Second question:
Have you looked at ATL's or Fulesafes' catalog? If you have the money they can liberate it from you... Thy can put a bladder in most any tank you just need to get your checkbook out. I decided that that was somewhere down the road for me in my project.

 

I'll look into that. if it's under 300, would be worth it for me.

 

Under 300

 

http://www.fuelsafe.com/pdf/Armoring.pdf

It looks like this link answers your question.

 

Somebody should make a replacement tank with a bladder (that doesn't cost 1/2 what the Vette is worth). that would sell, anyone? anyone?

 

Does any one know what these cost?

 

Probably over 1000 dollars

A regular square cell from them is 800

 

I didn't pursue it because of the holiday week.

You know, I did find this other post re. -8 AN fuel line - in the C3 Tech/Performance forum of Corvette Forum ... that might have a solution for what you want to do.

This thread is located at:
http://forums.corvetteforum.com/show...6&goto=newpost

They are discussing fuel lines, fuel connections, sumps, filters, pumps. What caught my eye was the sump. If you drill a hole on the bottom of your tank and weld a sump onto it, it seems to me that the sump will maintain the fuel while fuel is sloshing around in the tank above it. There was another pretty nice idea shown - using a small secondary 1/2 gallon tank - you might still get some sloshing ... but only when the main tank is empty.

 

Any of you guys get anywhere with the fuel cell.
I'm interested in doing this since I'm finalizing my fuel lines this weekend so I need to measure enough to compensate for a fuel cell in the future.
They're are a bunch of plastic ones at Jegs & Summit but they all are 17 inches long. I also measured my space and it has to be 14 inches deep to fit in that space.
If I go to a fuel cell its going to be a 32 gallon cell. Its not a track car but I don't want to have to fill the tank so often. Not worried about the added weight.
Might just have to have a welder make me an aluminum tank with a fuel cell pickup. -8an seems to be the popular output on all fuel cells.
PM me if anyone's found a fuel cell that fits a 68.
Poly fuel cells seem to be the cheapest.

 

I'd rather see a direct-fit plastic tank, like modern vehicles have.

 

I bought the poly 16 gallon tank from speedway and am starting the install now. I have decided to go with an Aeromotive A1000 installed in the tank. Has anybody done this? I was wondering what the best way to mount the pump inside the tank and what to do for a pickup.

 

Are you thinking the Poly tank is more rupture resistant in a rear end collsion? and just how rupture resistant is it?

 

Quantatively, I don't know how rupture resistant a poly tank is, but I do know that they are used in modern production vehicles. The speedway tank is a thicker gauge than in any of my cars with factory poly tanks. I do know that the tank is more puncture resistant than a stock steel tank (especially mine - I can punch a hole in it with my finger).

I understand that a poly tank isn't as safe as race cell, but my car is not at that level. It is a 1968 car. It doesn't have side impact protection, airbags, etc. If I decide to go with a roll cage, 5-pt. harnesses, and all the other fine mods for a race prepped car, then a race cell would be warranted.

 

68, I'm glad you energized this thread because it dead ended and I need a solution too.

But, I may not be on the same page with you. Fuelsafe has a bladder that they will install into your stock gas tank for $1500. If the tank gets crushed, the tank doesn't rip open. Seems like that would allow you to sleep at night if you drive around on the streets of north jersey. It doesn't have the capacity your looking for but I think safety is a higher priroity than capacity.

http://www.fuelsafe-hrpworld.com/ind...action=product

I like the idea of foam in the tank to prevent slosh; I like the idea of a sump; but I haven't found a 32 gallon tank that will fit the space unless you mount it real low directly behind the differential where it can be seen under the exhaust panel.

I had send out some inquiries and readily found 3 guys who would weld up a custom aluminum tank to my spec. You can fill them with foam but I don't see how that will provide crash protection. I would think that that the stock (2-piece, top & bottom)steel tank would have more resistance to ripping open in a crash than an aluminum tank with 4 ft of welded corners (tig welded or otherwise).

NJ, btw, what are your priorities? Capacity, safety, cost, availability, slosh, ease of installation, maintenance ... I'm sure my rear end is going to blow up before I get into a rearender so I'd prefer that the tank was out of the way and not hanging down low.

 

James,
Can you tell us the model number of the tank that you selected and post a link to the page?
Thanks

 

Look for the user Zwede on this forum. He had one built a while back. Here is his page on it. http://www.corvetteforum.net/c3/zwed...i/fueltank.htm

 

http://http://www.speedwaymotors.com...Fuel-Cell.html

25x17x9 - 4580458

I haven't fitted it yet, but by my measurements it should go in fine. I hope to drop the old tank soon and I will keep everyone updated.

Any thoughts on how to mount the aeromotive pump inside the tank?

 

The Fuel Safe tanks are god awful expensive. This is not a track car therefore I don't have the need for such a specialized tank. If I went to a track car then the money would be worth the safety. If I get rearended (knock on wood) the only concern will be for the safety of the driver who should be running for their life.
I'm looking for a cheap alternative that is functional and has capacity of 32 gallons. A poly cell which sounds like it is somewhat safe would be ideal over a metal tank but i don't see any that fits the stock 68 compartment. Seems like my only option is a custom welded tank. Besides the Fuel Safe tanks seem like they only have 80% fuel capacity due to all the extra material, foam, blatter and whatnot. Seems like overkill for a street only car. Just my opinion. A 32 gallon poly cell that fit would be great. Until I can find something I'll just use my stock tank and keep my fingers crossed when I pass a gas station.

If anyone knows of any good reasonably priced custom gas tank shops post their info...and any other resources you come across for gas tanks. I think I have worn out the summit website.