98 Mustang Cobra Master Cyl.- 12mx1bbl - Hot Rod Forum : Hotrodders Bulletin Board
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Old 10-15-2011, 10:33 PM
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98 Mustang Cobra Master Cyl.- 12mx1bbl

I'm using this master cylinder on my project. Both outlets are 12m x 1 bubble flare.
I bought two edelmann adapter fittings, #265000, to convert the master cylinder outlets to 3/16 brake line- both fitting outlets are 3/8-24 inverted flare for 3/16" line.
The problem is, the adapter threads only engage about one thread in the master cylinder. Any force exerted will surely wipe out the single thread connection. It seems the bubble shaped fitting end is really long,preventing more threads from entering and engaging more threads. Bummer.
This was a bit of a surprise- I thought I had found a simple way to convert from the 12m x1 bubble flare to 3/16" line.
I'm going to call Edelmann, but I thought I'd post to see if anyone else ran into this problem.
AGS has a 3/16" x 8 inch adapter brake line with 12m x1 bbl on one end and a 3/8-24 flare on the other- AGS-BLA-B312. It's around $3- I think I'm going to try this if I can find two locally. Hopefully more threads will engage the master cylinder with this setup.
Anyway, I'm bummin' over this.
I thought maybe someone might have a better way.
Any other suggestions?
Thanks in advance.
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Old 10-16-2011, 03:55 PM
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Another idea....

I'm considering shortening the long tapered adapter fitting end (32 1/2 degree taper) on a valve grinding machine, so that more fitting threads make contact with the master cylinder.
I'm going to run this by Edelmann tomorrow.
Any other ideas?
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Old 10-16-2011, 10:07 PM
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Quote:
Originally Posted by hafjag
I'm considering shortening the long tapered adapter fitting end (32 1/2 degree taper) on a valve grinding machine, so that more fitting threads make contact with the master cylinder.
I'm going to run this by Edelmann tomorrow.
Any other ideas?
I have done this in the past on a lathe. No Ill effects.
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Old 10-17-2011, 08:19 PM
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Edelmann Communication

I called the Edelmann Tech line- the tech person had no idea what I was talking about- total waste of time.
I bought a 3/16 brake line with bubble flare, and a "blue" steel 12 mm steel nut. This screwed into the master cylinder correctly, but I still prefer a 3/16 double flare hookup at the master cylinder - from what I've read, bubble flares don't work well for repeated disassemblies (spelled hot rod). I'm going to shorten the adapter fitting tomorrow....
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