Posted by Matt Wilson on Sunday, July 18, 2004 at 4:04PM :
In Reply to: Concept ??? pressure-vacuum gas cap posted by chris case on Sunday, July 18, 2004 at 3:20PM :
Despite it being a vented cap, it doesn't seem to relieve the pressure inside the tank very well. In these hot summer days, I notice that when I remove the cap, I feel a "whoosh" of air coming from within the tank. I'm pretty sure it's not a suction within the tank, but rather a positive pressure inside. Having this type of cap installed might defeat the purpose of some of you are trying to do, Chris, but I thought I'd mention it anyway.
Matt
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