[DeTomaso] Gas tank breather

[gow2 at rc-tech.net]

When I built my fuel tank, I wanted a roll over valve that was a vent.
Many of the aftermarket roll over valves have the ball valve outside the
tank and vent to fresh air. You can see it is the purple fitting.

http://www.rc-tech.net/cars2/panttransam/ei/ei3.jpg

I chose the valve which is set up internal to the tank. It took some real
fishing to get it in. A roll over valve really doesn't stop fumes or
sloshing fuel but as the name implies, roll it over and it closes the
vent.

With the internal valve I am left with not with an external vent I could
do nothing with but rather an AN fitting I can then take and do whatever I
wish to after that. If I bring the hose up high then ring it down I am
likely to catch all fuel which might creep up from the height. If I wish
to go into a vapor canister I still can.

G


> That's what I was going to say.  I put a Hall rollover on my tank, and
> then witnessed gas dumping onto the ground when I filled up the tank.  I'm
> not going to do that again.
>
> This time I'm going to run a hose to the filler neck, and then through a
> PCV valve.
>
>
>
> On 10/18/12 2:04 PM, "JDeRyke at aol.com" <JDeRyke at aol.com> wrote:
>
>>The vent hose should, for emissions purposes run to a connection in the
>>base of the air cleaner, which will help with the smell. The OEM hookup
>>was
>>from tank to a charcoal cannister, then from that to the air cleaner. The
>>engine will be happy to burn the evaporative light ends which is what
>>you're
>>smelling. The Pantera tank cap was vented (and needs to be) but most cars
>>on the
>>road today use a non-vented cap, so be careful with adaptions.
>>
>>The Hall plastic anti-rollover vent-valve is in fact a caged ball-check
>>and
>>was required for all cars after 1980. Wide-body Panteras got a very
>>expensive assembly that could, with enough money, be bolted onto an early
>>tank but
>>will work no better than Hall's $30 assembly   Hall's is a clever
>>adaption
>>of a stock mid-'80s Ford valve to fit the Pantera gas tank. Sometimes,
>>the
>>adapter grommet or the rubber gasket dries out & cracks so fumes get out.
>>Early tanks had as-stock a rivited-on steel dome with only some foam
>>inside; do
>>not expect much foam to be left 42 yrs later... Good luck- JDeryke
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