remove/replace 1975's fuel tank bladder/fittings?
#1
remove/replace 1975's fuel tank bladder/fittings?
ok, we all know that later c3s had bladders, but if you have a desire to replace the outlet fittings (with larger ones...there's a *bit* of horsepower to be developed) while retaining the bladder, how would you do it? do i need to replace the bladder with a new one? or should i just scrap the bladder and seal and sponge the tank? i want to keep from moving to a fuel cell if possible.
#2
Race Director
All your mods can be made with the bolted on oval filler assembly. No need to touch the bladder.
The bladder opening is roughly the size of the bolts ring you see.
The bladder opening is roughly the size of the bolts ring you see.
#5
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Its a yes and no. If I am right? Others will confirm. The vac to the charcoal canister is to burn off contained gases. Yet there is a balance of pressures. The bladder will not collapse unless there is a bad seal as shown in the cover in the pic on the above post, or there is a rust hole in the metal tank. The bladder is just a liner to save ya *** in a rear end hit. It does'nt collapse as you burn gas.
Pic of inside.
When I cleaned this out I found 14 cents.
Someone please correct me if wrong.
Michael.
Pic of inside.
When I cleaned this out I found 14 cents.
Someone please correct me if wrong.
Michael.
Last edited by mdbelanger; 01-02-2009 at 07:52 PM.
#6
yeah, i knew it isnt designed to collapse, but i thought the vac line would be set up to keep vacuum OUTSIDE of the bladder to prevent collapse. i suppose it makes more sense that it is just a vapor removal system.
#8
Race Director
Now that you mention it. the tee'd fitting to the canister is attached to the tank itself. That opening is sealed between the tank and the bladder. So if you put enough vacumn on that fitting and the bladder was intact, you should be able to expand a collapsed one.
Second thought, since it's tee'd, it just must equalize the pressures.
You might be onto something.
BTW
The tank pic I posted above didn't have a collapsed bladder, but I did remove it and use it to cut strips to mount the tank with.
Second thought, since it's tee'd, it just must equalize the pressures.
You might be onto something.
BTW
The tank pic I posted above didn't have a collapsed bladder, but I did remove it and use it to cut strips to mount the tank with.