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Mustang drag cars launching and fuel spilling out the rear filler tube.

1384 Views 22 Replies 13 Participants Last post by  pateryan56, 
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During the summer I watched quite a few 65-70 Mustangs at drag strips and noticed that quite a few that were really quick cars had fuel splash issues of fuel coming out the rear fuel filler cap area as they launched off the line.

What are some really good ways to stop that from happening aside from going to a custom fuel cell. My car will probably see high tens to low elevens so that is a concern.

I appreciate your input guys and thanks!
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pateryan56
Nailbender said:
My gas cap has double gaskets and the vent is closed. The fuel tank vents out the quarter trim. I have a glass fuel filter mounted near were the vent line ties into the filler neck. The fuel filter acts like a shock absorber when pulling G's and stops most if not all fuel from escaping. A mandatory fix that had to be done so I could continue competing. I fill my tank to the top before every event.

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Best solution I've seen! What kind of nipple did you use and I can't make out the type of filter you used. Also, can you tell me where exactly on the quarter trim is vents out of? Thx!
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Nailbender
pateryan56 said:
Best solution I've seen! What kind of nipple did you use and I can't make out the type of filter you used. Also, can you tell me where exactly on the quarter trim is vents out of? Thx!
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Just a 1/4"npt nipple threaded into the side of the filler neck. Not much to thread into and it has to be removed to remove the filler neck, I use a little RVT on the threads. The filter is a generic 1/4" tube glass filter from Amazon. 65 hardtops have a hole that is full of dum dum "putty" from the factory behind the quarter panel extension. I just removed the putty and ran the hose down the quarter panel extension and cut it off even at the bottom. You should have a rollover valve to be safe, It's on my to do list.

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pateryan56
Great help! Thank you Nailbender, I've been looking for a suitable solution and this is it!
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