Okay, so I gave up on using AN-6 bulkdhead fittings on a tank drilled for AN-8 fittings. I mean, it worked, and didn't actually *leak*...just maybe weeped ever so slightly sometimes.
I didn't have enough room to use the regular AN-8 fittings, so I ended up with 90 degree AN-8 bulkhead fittings. This design fits much tighter to the tank than the 90 degree bend fittings. Stepping it down to a 5/16" barb (or some other combination of plumbing to get to my fuel filter) proved to vex me. I thought I had it figured out and came home from the race shop with $70 in fittings and line that I thought would do it, but I was wrong. Ugh.
Poring over the Summit catalog, Internet, Home Depot, Advanced Autozone, etc., I couldn't figure out a solution with less than 43 adapters at $25 a pop! ARGH!
Then I remembered something...
I have a lathe!!! So, a few minutes later, I'd converted an AN-8 to AN-4 adapter to an AN-8 to 5/16 barb adapter!
Try and find
that one in your speed shop catalog!
Man, aluminum threads disappear in a hurry! I'd prefer a bit more length to the barb, but I'm happy with it.
Attachment:
fuel.fitting.turned.jpg
I opened the bore up from about 1/8" to almost 1/4" for better flow.
Attachment:
fuel.fitting.bored.jpg
I'm embarrassed to display my worst safety wire job EVER! I can only excuse it as being a one-hand blind job inside the tank, with my wire twisting pliers 30 miles away in the hanger. All the same, should keep them snug. I have a lot more respect for OB/GYN's now.
Attachment:
fuel.fitting.wired.jpg
The result is a very tight installation. I think it would fit in a 2" cavity with room to spare.
Attachment:
fuel.fittings.slim.jpg
_________________
...nowadays people are so intellectually lazy and lethargic that they can't build ANYTHING with their hands. They'll spend hours watching whiny people marooned on an island, but won't spend a second adding anything to the world. -weconway
Visit my
[Locost 7 build log]