Author Topic: Gas caps  (Read 435 times)

Offline bikewiz

Gas caps
« on: May 09, 2017, 09:17:21 PM »
Beyond the usual suspects like the fake Aston cover with a locking cap inside http://www.minispares.com/product/Classic/Fuel/Tanks,%20fittings/SP227.aspx?1304&ReturnUrl=/search/classic/petrol%20cap.aspx|Back%20to%20search or the type with the threaded brass ring that attaches to the filler neck http://www.minispares.com/product/Classic/Fuel/Tanks,%20fittings/SP228.aspx?1304&ReturnUrl=/search/classic/petrol%20cap.aspx|Back%20to%20search, what type of cap are you using? I think the fake Aston style are a little big on the back of the car. I have a stainless locking one which is a PITA and isn't exactly good looking. I don't need a locking type because I'll be away from my car so long that someone will steal my gas...not. Anyone used one of the Fah-ler stainless ones?

Offline LarryLebel

Re: Gas caps
« Reply #1 on: May 09, 2017, 10:16:46 PM »
A locking cap also prevents items from being put in.

Offline MiniDave

Re: Gas caps
« Reply #2 on: May 09, 2017, 11:19:45 PM »
The one you cited still has a locking cap......I have a locking cap too and I find it a PITA, but I need a non-venting cap and I haven't found one yet that is just a plain cap but not vented.

A friend has one of the caps you cited and I think they stick out too far....just my opinion and worth exactly what you paid for it!  ;D

1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline thebluepotato

Re: Gas caps
« Reply #3 on: May 10, 2017, 09:14:33 AM »
I have these and honestly, all mini caps leak with aggressive/fun cornering.  I have yet to find a solve to prevent fuel leaking at the top - other than 1) cutting/welding a different filler neck and cap, or 2) going with race tank in boot.  There has to be a solution here....

Offline MiniDave

Re: Gas caps
« Reply #4 on: May 10, 2017, 10:11:08 AM »
That hasn't been my experience......however, a vented cap will put out fuel like crazy on a spirited right turn......as I found out on our last trip to Texas. Bruce was following me and told me gas was pissing out on turns!

I wondered why I went thru the first part of the tank so quickly on those runs!

When I got home I put my old locking cap (non-vented) on again, and now it doesn't leak a drop...... :-[

I had forgotten that this tank is already vented with a hose off the top, so it needs a solid cap instead of a vented one.....but I have yet to find a non-vented plain cap from any of the usual suppliers.
1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline MPlayle

Re: Gas caps
« Reply #5 on: May 10, 2017, 11:52:43 AM »
Would you be interested in this one?

I have it in my "leftovers" stuff from prior projects.






Offline MiniDave

Re: Gas caps
« Reply #6 on: May 10, 2017, 12:31:45 PM »
Michael, that should be fine....I have a like new vented one if you need it - be happy to trade.

PM me details. Thanks!

BTW bikewiz, if you use the that Monza style cap with the thread on brass ring and you want to remove your gas tank, the only way to do it is to cut the neck seal cause that ring - once it's on - will NOT come off again....and I have not had any luck getting it past the outer neck seal! FWIW...
« Last Edit: May 10, 2017, 12:44:26 PM by MiniDave »
1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline bikewiz

Re: Gas caps
« Reply #7 on: May 10, 2017, 09:46:13 PM »
I've decided to make my own. The aftermarket stuff is junk and my lathe skills are somewhat adequate and a 10" piece of 3" 6061 T6 is less than $30 so I can F'up 4 or 5 times. To quote Clarkson "how hard can it be..."
I'll let you know when I make the prototype.

Offline MPlayle

Re: Gas caps
« Reply #8 on: May 11, 2017, 09:08:04 AM »
Another alternative might be finding someone with the skills and access to one of the 3-D printers that uses metalic media and print them as needed.


Offline MiniDave

Re: Gas caps
« Reply #9 on: May 11, 2017, 10:08:17 AM »
To quote Clarkson "how hard can it be..."
I'll let you know when I make the prototype.

Got your biggest hammer?   ;D

Take some pics of the process, I love watching people work!   4.gif
1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline bikewiz

Re: Gas caps
« Reply #10 on: May 11, 2017, 09:22:00 PM »
Another alternative might be finding someone with the skills and access to one of the 3-D printers that uses metalic media and print them as needed.
I've tried this. First you need to know/own/and use Solid Works, Autodesk or otherwise, then you need someone who hasn't sold all of his print time  to people who will pay more than say $30 and then you beg and bribe and it still will cost more than $30, figuring a good 6 pack is at least $10.....
As we say at my bike shop, I'm throwing down. I'll have have 6061 chips flying, I just bought a 8" piece of 6061-T651 for $20 allowing for waste in the chuck I can screw up at least 3 prototypes.

Offline bikewiz

Re: Gas caps
« Reply #11 on: May 15, 2017, 06:50:22 PM »
Here's the start of my gas cap. Question I have for anyone with a non-locking cap is the "t" that engages the filler neck spring loaded? I plan on making it a little shorter but it will fit down over the filler neck.
« Last Edit: May 15, 2017, 06:52:28 PM by bikewiz »

Offline BruceK

Re: Gas caps
« Reply #12 on: May 15, 2017, 07:19:38 PM »
The cap is looking good! 

And The Who sticker is excellent.
1988 Austin Mini
2002 MINI Cooper S
2007 Triumph Bonneville

Offline bikewiz

Re: Gas caps
« Reply #13 on: May 15, 2017, 07:32:48 PM »
Thanks!

Once a Wholigan always a Wholigan....seeing the boys again in July.

Offline gr8kornholio

Re: Gas caps
« Reply #14 on: May 15, 2017, 08:24:03 PM »
Jealous 4.gif
I am the GR8KORNHOLIO! Are you threatening me?

Saussie Aussie 1965 Australian MK1 Mini.
"Beavis" - 07 MY/MY MCS, B/MY Konig Daylites, JCW sideskirts, TSW springs, TSW lower rear control arms -- Exploring the country with new friends since 11/09.

Offline bikewiz

Re: Gas caps
« Reply #15 on: May 16, 2017, 09:02:11 PM »
More progress = more aluminum chips. Couple more hours finishing, fitting the retention tab inside, and painting in the roundel.

Offline 94touring

Re: Gas caps
« Reply #16 on: May 17, 2017, 07:48:15 AM »
That's really slick  4.gif

Offline Willie_B

  • CREW
  • 1380cc
  • *****
  • Posts: 534
  • Total likes: 32
  • Karma: 7
  • He who laughs last, thinks slowest.
    • Lilburn, GA,
Re: Gas caps
« Reply #17 on: May 17, 2017, 08:45:59 AM »
When does production start? 4.gif

Offline MiniDave

Re: Gas caps
« Reply #18 on: May 17, 2017, 08:59:27 AM »
Here's the start of my gas cap. Question I have for anyone with a non-locking cap is the "t" that engages the filler neck spring loaded? I plan on making it a little shorter but it will fit down over the filler neck.

No, it's not spring loaded on either of the caps I have. However, I'm pretty sure you won't want it to move as you turn the cap, so will you cut a small notch that the cross piece will lay in? Also, I think you'll want the cross piece to be spring steel, right? how you going to fab that?

What will you use for a gasket/seal?

I really like the looks of this, I think WilliB is right, you could sell them, although I'm sure it would be really spendy to make them out of billet like this.
« Last Edit: May 17, 2017, 09:02:46 AM by MiniDave »
1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline bikewiz

Re: Gas caps
« Reply #19 on: May 17, 2017, 11:23:15 PM »
I plan to use some Buna-N rubber probably 1/8" the "t" that engages the slot in the filler neck will be 304 SS not spring steel, the neck it self has a tapered interface. I'll let you know if it works after I fab it it......I took a bunch of measurements but really my experience with this is if I want the outside of the cap to fit over the filler neck I'm somewhat flying blind. It has been really difficult to get accurate measurements from the neck it self, the portion on my tank that seals actually folds in.
I stopped by the sign shop today to see if they'd cut some blue and red vinyl for the cap, so I won't paint it I'll have inset vinyl instead, I asked for a sheet of 5 so I can replace them as necessary.

Offline MiniDave

Re: Gas caps
« Reply #20 on: May 17, 2017, 11:36:38 PM »
My question is about the crosspiece, if you just rivet it on with one rivet or screw in the middle, what's to keep it from turning? And if it turns, will the cap come off?

I can measure the length of the crosspiece for you......

In the first pic, the "cup" part is right at 1.5", the nubs measure 1.88" across

In the second pic, notice the two rivets, and the crosspiece is spring steel.....
« Last Edit: May 18, 2017, 12:00:56 AM by MiniDave »
1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline bikewiz

Re: Gas caps
« Reply #21 on: May 18, 2017, 08:30:09 AM »
The second picture is what I planned on having it look like. Instead of rivets I plan on using 2 screws threaded into the cap.

Offline MiniDave

Re: Gas caps
« Reply #22 on: May 18, 2017, 09:44:52 AM »
Perfect. I'll be interested to see your final product, it looks terrific so far, I really like the deep skirt idea....
1989 Cooper Racing Green
2009 Clubman S
1969 Jaguar XK-E FHC
2004 Audi Allroad 2.7 TT

Offline bikewiz

Re: Gas caps
« Reply #23 on: May 19, 2017, 03:03:21 PM »
More progress, made the cross piece and 1/16" and 1/8" rubber gaskets. Next will just be a final check for fit and polish the bejeezus out of it. The cross piece/retainer is a piece of 6/4 Ti.

Offline bikewiz

Re: Gas caps
« Reply #24 on: May 20, 2017, 08:49:27 PM »
Pretty much finished. Polished it and applied the vinyl, tweaked the fit a little. It's 1/4" shorter than the Aston style and much smaller diameter, sort of the same size as the Monza ones. No I won't make you one, I have around 8 hours in this.