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Old 03-02-2012, 11:39 AM
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fuel tank venting

putting a 65-69 mustang gas tank under frame in a 51 chevy truck, using a marine type sealed filler cap.
any suggestions for a vent? it looks lke I will have to drill the top of the tank, and either epoxy one in or use a screw in..
would you just put a vent in? seems like I would have to run a tube o a place higher than the fill? or fue would come out the vent on fill up? read about using one way valves, but that wouldnt provide vent and vacumm relief, right?

saw this. install and run a line up above the fill height?
http://www.ebay.com/itm/190526052364...84.m1423.l2649

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Old 03-02-2012, 11:59 AM
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why cant you just use a vented cap?
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Old 03-02-2012, 12:05 PM
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Go to the Tank's, Inc . These folks have a couple of versions - pick the one you need and go from there.

For my '31, I needed to extend it height wise, then run a length of 1/4" rubber hose to a place in my wheel well with a couple of loops to make a vapor trap - think of a sink drain. If you do build up pressure, it will blow the line clear and vent the fumes. Unfortunately, it is an open system and there is a chance you will have some gas fumes in the garage occasionally ....
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Old 03-02-2012, 12:13 PM
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great,! went to tanks and they had this.
http://www.tanksinc.com/index.cfm/pa...prod/prd98.htm

It should be easier to tap the filler neck ,install a barb and run line like Irland..plus it's rollover instead of just a vent.
any thoughts on running the vent line through a charcoal canister?
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Old 03-02-2012, 01:20 PM
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Quote:
Originally Posted by skip99
great,! went to tanks and they had this.
http://www.tanksinc.com/index.cfm/pa...prod/prd98.htm

It should be easier to tap the filler neck ,install a barb and run line like Irland..plus it's rollover instead of just a vent.
any thoughts on running the vent line through a charcoal canister?
Happy it works for you

Shouldn't be a problem to add a charcoal system if you have room for the additional equipment. I considered a GM pick up truck canister and arrangement but decided I really didn't want that much more claptrap on a 'simple' street rod with a visible engine compartment.
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