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I would use new cables to set it up as the old ones are stretched. The beatle cables are very close to the right length. The way I did it works, but new ends is the way to go. The originals are crimped on just like the new ones, so it is not a strength issue. However there is very little room in there to mess around. I did mine before the Porsche items were available.
This is the proceedure. It may take a couple of tries to get it right as I didn't measure things. Be sure to use new cables.
Cut off the bug clips as close to them as possible. Put on the new ends making sure the cable is bottomed in the new clip. Wedge it in place with a very small nail, tape, or even a small drop of Super Glue, you want to have it stay in place while you measure, but not be permanent in case you want to shorten the cable.
Clip the new cables on the rear brakes and thread them into the tunnel to the emergency brake handle. Once you thread the cable up through the handle install the nuts with a couple of threads showing. Make sure the emergency handle is all the way down! Measure the distance from the handle to the back side of the nut and that is the excess cable length. I would leave an extra 1/8 inch so the cable is not tight with the handle down.
Remove the cable, pull the cable out of the clips, measure the above length and cut it off, reinsert the cable again temporarily and measure to see if the fitting is correct. If the fitting is correct you can then crimp the cable making sure the end is all the way in. Reassemble and you should be good to go.
There is one other problem. The 944 hub has a long cone shaped tube coming out of the hub through which the cable runs. The outside cable end ( the large diameter black flexible cable through which the brake cable runs from the brakes to the chassis) should fit into the end of this tube. It doesn't. The end is curved and it will flip out of the tube and hang up the brakes. To get around this I took the cone shaped tube out of the hub set it up right and hammered the end of the tube with the round end of a ball pein hammer to flare it to match the curve of the big cable end. Due to the flare, the end will not flip over it just tries to slide back into the end of the flare. As an additional precaution I slipped a short length of rubber tubing over the joint between the cable end and the cone and worm clamped them tightly together. Please make sure this is right before you shorten the cables!!!!!!! If by chance your cables are too short you can trim off the ends of the cones to correct for the problem.
As far as using your emergency brakes like you do on your bug forget it as the shoes aren't very big at all. They will hold you starting on a hill or maybe one emergency stop and not much more.
It is alot easier than it sounds and I have tried to include all contingencies, however there is always questions I didn't think about.
I don't know if they sent instructions with the Porsche clips or not, but properly installed they won't come apart. They have been used on aircraft for years.
I would also use new brake hard lines to the calipers. They are bent different than a bugs even though you follow basically the same path to the caliper. The fittings on mine bolt right up to the single pot rear calipers.
I hope this helps as it is a very good easy way to get ventilated large diameter brakes in the rear of a bug.
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