73 rear brake changes

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bedlamite
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73 rear brake changes

Post by bedlamite » Fri Jun 30, 2017 9:30 am

I'm doing an IRS conversion, and looking at brakes. Most disc kits with E-brake for IRS have a split at either 72 or 73 1/2, and I'm wondering what the changes were?

Also, what's the general opinion of the CB kits that use custom hubs and 914 rotors?

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Marc
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Re: 73 rear brake changes

Post by Marc » Fri Jun 30, 2017 11:53 am

Only change that comes to mind is lug-centric vs hub-centric rotors & rims.

I like my stock Porsche 944 rear brakes. Nearly a bolt-on (you need cable "swans" available from vdubengineering). Just put another set on my trike, this time eliminating the flex hoses and running 28" #3-AN braided lines with a 90° fitting at one end (Allstar 46302-28). Need four male bubble-flare to male #3-AN adapter fittings, Russell 641431.
Porsche rims typically have BIG backspace and require spacers (even the stock 924/944s use 20mm hubcentric pass-throughs). If you don't want to run 5x130, there may be adapters available. I needed 28mm spacer thickness on the trike and just adding 8mm ones would've lost hub-centricity so I replaced the lo-o-ong stock studs with some shorter ones to allow using a 28mm bolt-on spacer. https://scontent.fsnc1-2.fna.fbcdn.net/ ... e=5A0DD806

Bruce2
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Re: 73 rear brake changes

Post by Bruce2 » Fri Jun 30, 2017 12:06 pm

Hmmm, it's unusual for Marc to miss this....

In 73, VW moved the e-brake rearward by a small amount. This requires shorter e-brake cables. Otherwise, nothing else changed.

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bedlamite
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Re: 73 rear brake changes

Post by bedlamite » Sat Jul 01, 2017 1:15 am

Thanks, I'll probably be getting the early kits with the longer cables then. Part of the reason for the disc conversion is to use the 4x130 wheels I have that match the front.

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Marc
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Re: 73 rear brake changes

Post by Marc » Sat Jul 01, 2017 10:02 pm

Bruce2 wrote:
Fri Jun 30, 2017 12:06 pm
Hmmm, it's unusual for Marc to miss this....

In 73, VW moved the e-brake rearward by a small amount. This requires shorter e-brake cables. Otherwise, nothing else changed.

Yes, the `73-up cables are ~2" shorter overall - if the disc brake kit includes cables, that's probably the difference.

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