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Old May 23rd, 2013, 08:44 AM   #1
CheapThrillB2
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Default fuel cell ? about roll over valve

I purchased RCI fuel cell model 2191a.

It has the three ports on the top, feed-return-roll over valve. Does it have the valve in the tank? Or is it just a port to install a valve onto? And what do most guys do as far as venting that port? The feed and return are capped off as I installed a oe sending unit into the cell.

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Old May 23rd, 2013, 09:36 AM   #2
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one of the 3 ports should already have a rollover valve installed inside the cell. Can you see through the port? A simple check is to try to sticka screwdriver through the port for the rollover valve. You shouldn't be able to...
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Old May 23rd, 2013, 10:17 AM   #3
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The ports were labeled, I just didn't know if the valve was actually in the tank or not, have to check when I get home.
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Old May 23rd, 2013, 10:42 AM   #4
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Yep, the rollover is a bulkhead fitting, so it should be in there.

From what I've seen the rollover valves don't always work that great on a side flop, so you may want to run the vent lines similar to U4 cars if you don't want to spill gas on a flop.


Quote:
6.2.14.3.6 Fuel vent lines must have a rollover check valve incorporated at the fuel cell, and must vent outside of occupants’ compartment, and be directed away from the engine and exhaust system.

6.2.14.3.7 Fuel vent line must use one of the following routings:

6.2.14.3.7.1 Fuel vent line must extend to the highest point of the roll cage nearest the fuel cell, across the width of the vehicle, and down to below the belly pan of the vehicle or 3” below the fuel cell, whichever is lower.

6.2.14.3.7.2 Fuel vent line must loop above the fuel cell to a point that is 4” above the top of the fuel cell. From there it shall be wrapped one full loop around the outside of the fuel cell near the top of the fuel cell and then be routed down to a point 3” below the lowest point of the fuel cell.
We flopped the Wag during a race and had never done either of the vent routing setups explained and we had fuel draining out of the cell until we cut a zip tie and moved it to the high side. (even though we had a roll over valve) Beyond the safety concern, it took us about 20 minutes until we had help to right the vehicle, and we didn't want to lose that much fuel since we are cheap asses.

The "3 and down" type routing do help gas spills since the vent will be higher than the tank in any orientation.

I copied the rule about having the vent away from exhaust because I figured that although it's common sense that you don't want gas vapors near hot exhaust, it was worth repeating.
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Old May 23rd, 2013, 11:00 AM   #5
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Quote:
Originally Posted by JohnnyJ View Post
Yep, the rollover is a bulkhead fitting, so it should be in there.

From what I've seen the rollover valves don't always work that great on a side flop, so you may want to run the vent lines similar to U4 cars if you don't want to spill gas on a flop.




We flopped the Wag during a race and had never done either of the vent routing setups explained and we had fuel draining out of the cell until we cut a zip tie and moved it to the high side. (even though we had a roll over valve) Beyond the safety concern, it took us about 20 minutes until we had help to right the vehicle, and we didn't want to lose that much fuel since we are cheap asses.

The "3 and down" type routing do help gas spills since the vent will be higher than the tank in any orientation.

I copied the rule about having the vent away from exhaust because I figured that although it's common sense that you don't want gas vapors near hot exhaust, it was worth repeating.
butterfly valve on the vent works too... once you are out to turn the valve...
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Old May 23rd, 2013, 12:00 PM   #6
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Thanks.....I have a fear of fire on my rigs so thanks for the ideas .
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Old May 23rd, 2013, 03:01 PM   #7
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double check those ports. they labeled my rci wrong. created a whole night of headaches when trying to get my buggy started.
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Old May 23rd, 2013, 03:03 PM   #8
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Quote:
Originally Posted by chevotass View Post
double check those ports. they labeled my rci wrong. created a whole night of headaches when trying to get my buggy started.
This happens often, ive also installed a few that were mis labeled. ..sux u waste time diagnosing a NO fuel problem because a damn sticker was mis stuk..


sended frum dis stoopid fone.
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Old May 23rd, 2013, 06:08 PM   #9
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Thankfully I am not relying any of them then then a vent.
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Old May 23rd, 2013, 11:36 PM   #10
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Quote:
Originally Posted by CheapThrillB2 View Post
Thanks.....I have a fear of fire on my rigs so thanks for the ideas .
I never had that fear until it happened. Now I do for sure. Not an area to skimp.
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Old May 24th, 2013, 12:18 AM   #11
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First ranger truggy caught then air intake pipe in fire when it dislodged and fell on the manifold.

Last year I blew a p/s hose and caught the EB on fire.

Had fire extinguishers handy both times and put out both with no real damage. But gas is a different kind of fire lol.
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