Fuel Cell vent routing

[spalind]

Can I have some critique on this routing? I believe I will need a longer vent line as doesn't it need to go the way it is going but come back down below the fuel cell for where it terminates?

 

[partybarge_pilot]

Make a 90 at the end and make it go down below the cell. As it is if your upside down it will puke everywhere.

 

[Ol' Curmudgeon]

^^^ What he said.

 

[y2kbaja]

And the vent should go higher than the highest part of the filler (it does now but it doesn’t look like a filler neck is installed yet)


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[Chubs]

Is that in the back of the Nissan? I thought fuel cells weren’t required so long as you were using a stock gas tank in the stock position?

 

[Dirtracer 619]

I think your vent line is to small. May have trouble filling fast Will think its full but it wont be imo.
If your not racing no biggie


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[spalind]

Is that in the back of the Nissan? I thought fuel cells weren’t required so long as you were using a stock gas tank in the stock position?

In rally, yes, the stock is fine...I'm modifying my truck to be both rally and desert compliant

 

[spalind]

I think your vent line is to small. May have trouble filling fast Will think its full but it wont be imo.
If your not racing no biggie


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The line with the filter on the end, yes? Is it possible to connect a larger line to that fitting?

 

[85yota]

The entire vent line is too small. 3/8 or even 1/2" line won't take a dump can or even a gas station pump at full speed. I modified my fill plate to accept a 1" ID hose. Now I can fill as fast as I can.

 

[spalind]

The entire vent line is too small. 3/8 or even 1/2" line won't take a dump can or even a gas station pump at full speed. I modified my fill plate to accept a 1" ID hose. Now I can fill as fast as I can.

How on earth do you have a 1" hose attached to a little fill plate? Photo?

 

[Zambo]

Ya put a bigger fitting in the fill plate. Now if you're just gonna fill it with a fuel nozzle from a pump, all you need is a gap around the filler neck and the small vent will be fine for compensating for fuel usage when driving. But you need a big diameter vent if you're going to fill it with a quick dump can. Heck, even a street car has a 5/8" or so vent line that goes back to the filler neck.

I always imagine that the fuel cell has four sides and a top and a bottom. The vent line should extend past each one of these six sides at some point so no matter which way the truck lands, there is a part of the vent line that is higher than the cell. Probably not likely that your truck ends up standing vertically after a roll but generally its not that hard to route the line in this manner.

 

[crafty]

One inch vent is built into my filler plate

 

[jon coleman]

3/4 min, one loop around & down aimed away from any thing sparking or hot, lights , brakes,exhaust, then i attach a ph2 oil filter , louver about3 1/4" slots on filter can, facing down , that way it vents pretty good even after a mud bath.that little k& n plugs up quick in the dirt, that issue has befuddled many a racer...race on