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Old 03-03-2011, 03:51 PM
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Default C5 brake master cylinder in a C3, Line adapter question

Trying to adapt the C5 master cylinder to the C3 distribution block.

I need to make a short brake line with a bubble flare on one end and a double flare on the other end. I can buy a short length with the bubble flare already on it but the tube is 6mm (.236). So I can't really grip this tube with my double flare tool. To make this even more complex, I need to go from a 12mm x 1.5 bubble flare (rear port on C5 master) to a 1/8-27 NPT on a Wilwood adjustable valve. Then, the front port is 12mm x 1.0 and I need to go to an inverted flare with a 1/2 tube nut.

Any ideas? Is there an ISO bubble flare that uses a 1/4 inch line? Any other solutions (adapters etc)?
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Old 03-03-2011, 04:45 PM
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no, you need adapters to -3 or -4 an lines (3/16 & 4/16). Pegasus has them but not all with the proper flare (not inverted) so I used a simple solution for the one that was flares the wrong way around, I epoxied it into the master. So far no issues.
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Old 03-04-2011, 03:11 AM
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You can bubble flare standard brake line. I have done it many times. If the metric fitting is a little snug on the line just run a drill bit threw it to make for a better fit.

Actually if you don't have a bubble flare tool, you can usually get away with only doing the first step of a double flare. It may not be right, but I have done it before I had my good flaring set and it seal up.
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Old 03-04-2011, 01:48 PM
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Change of plans, I am going to ditch the C3 distribution block and use the Wilwood combination valve (pn 260-11179) with the adjustable brake bias built it. All the ports on the Wilwood unit are -3 inverted flare. I found some adapters to change the ports in the C5 master to -3 inverted flare so now the I can connect the master to the Wilwood valve. I need to find some adapters to go from -3 inverted flare (male) to -4 flare (female), then I can connect the C3 lines to the combination valve.

In the front port of the C5 master I used a NAPA 7936 adapter (12 x 1.0mm to 3/16) and in the rear port I used a Edelmann 262400 (12 x 1.5mm to 1/4) and another Endelmann 258340 (1/4 to 3/16)
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Old 03-04-2011, 03:20 PM
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who sells those adapters?
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Old 03-04-2011, 03:53 PM
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The front adapter I bought at NAPA but it's an Eaton PN. The rear adapters I bought at Orielly's but they are Edelmann part numbers.
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Old 04-13-2011, 02:20 PM
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OK, Finnaly got this worked out. As posted before, front port of the C5 master I used a NAPA 7936 adapter (12 x 1.0mm to 3/16) and in the rear port I used a Edelmann 262400 (12 x 1.5mm to 1/4). I did not use the Endelmann 258340 (1/4 to 3/16) in the rear port. I found a short brake line at NAPA that was a -4 inverted to -3 inverted. The front line is a -3 inverted to -3 inverted.

The two adapters on the botton of the Wilwood valve (that connect the stock C3 lines) are both Edelman 258340 -3 to -4 inverted flare adapters.

Also cut the length of the pushrod in the booster and made a new bracket for the valve.

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Old 04-13-2011, 06:46 PM
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Next you going to say you did all that work on that nice white carpeting.....


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Old 04-13-2011, 08:36 PM
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Quote:
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..................

Damn that's pretty!
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Old 04-14-2011, 03:02 AM
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Quote:
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Next you going to say you did all that work on that nice white carpeting.....


It's funny that you say that. 7 years ago that room was filled with parts I took off of my 68. I got divorced the year before and the ex got the furniture, I got the house. So, it looked like an indoor junkyard, wish I had pictures.

Yes the carpets been cleaned since then and I actually have new furniture now.
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