
01-03-2014, 04:09 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
NH
Cobra Make, Engine: CSX 4772 old iron FE
Posts: 5,499
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Not Ranked
I'm retro fitting one of our keyhole button caps to an Aurora right now. It has a small 1/8" breather tube in the side of the neck.
Don't our caps vent through the screw hole in the middle?
On the new Shelbys they have a horseshoe shaped tube in the fill neck that draws a vacuum off the tank vent (outside of the tube) by a venturi effect (inside of the tube) from filling it. Of course my detailed explanation doesn't address your cap venting question it pertains to filling.
Last edited by mickmate; 01-03-2014 at 04:12 PM..
Reason: I'm rambling off topic
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