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> BMW calipers
mike_the_man
post Jul 6 2004, 05:11 PM
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Hi all,

I just bought some calipers from an early 80's BMW 320i for the teener. I've heard that they have to be machined slightly to fit. Does anybody know how much material has to be taken off, or the best way to measure how much to remove? They will be going on to a 74 2.0L. I haven't tried to install them yet, but I'm assuming that the mounting ears need to be machined down a little so that the rotor is perfectly centered in the caliper, correct?
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banderson
post Jul 7 2004, 08:21 AM
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I did this last year. If I were to do it again now, I would seriously consider the new hubs. Vented rotors are the way to go. BMW will not get rid of heat any faster.

Anyway, the trick to machining the rotors is holding them. The holes can be taped to 1/2-20 and a block of AL can be drilled with the correct spacing and screwed to the back side of the caliper. Then it can be held in a vise and machined.
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Posts in this topic
mike_the_man   BMW calipers   Jul 6 2004, 05:11 PM
rick 918-S   Someone has done this here that's for sure. I ...   Jul 6 2004, 05:35 PM
john rogers   The "other 914 site" has the article that covers h...   Jul 6 2004, 05:38 PM
skline   They need to be machined down about 1/8 of an inch...   Jul 6 2004, 06:29 PM
Dave Blackburn   I machined mine down about 1/8". The exact number ...   Jul 6 2004, 07:06 PM
Aaron Cox   do any late model 3 series/5 series have a 914 com...   Jul 6 2004, 10:07 PM
Mueller   I spoke with an engineer at Wilwood, he said a lit...   Jul 6 2004, 10:14 PM
skline   Didnt really solve it, just going to run them tomp...   Jul 6 2004, 10:27 PM
rick 918-S   I'm running 4 piston units from a BMW 2002. Th...   Jul 7 2004, 08:21 AM
banderson   I did this last year. If I were to do it again no...   Jul 7 2004, 08:21 AM
SteveSr   Also have read that pre 73 cars require no machini...   Jul 7 2004, 08:42 AM
Aaron Cox  
 

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