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miniobsessed
PostPosted: Mon Dec 24, 2007 3:05 am 
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Joined: Mon May 22, 2006 12:33 am
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Location: Western Australia
Hey Guys!

Just wondering if anyone can tell me exactly how big a 1st oversize drum brake would be?

Cheers
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drmini in aust
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PostPosted: Mon Dec 24, 2007 6:19 am 
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Location: near Baulkham Hills, NSW
1st oversize is + 1/32"
2nd is + 1/16".
Get the brake shop to supply rebonded shoes to suit, they are radius ground to the right curvature.
Don't try and use stock shoes, they will be worn out before worn in. :lol:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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simon k
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PostPosted: Mon Dec 24, 2007 10:43 am 
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don't bother grinding them..... it's a waste of time, new drums are $40 each and are a whole lot easier in the long run - dealing with oversize shoes is a pain in the arse

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miniobsessed
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PostPosted: Mon Dec 24, 2007 11:15 am 
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Well looks like they're already 2nd OS... And they're out of round so it'll be new ones anyways...

Cheers!
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drmini in aust
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PostPosted: Mon Dec 24, 2007 11:50 am 
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By the time they get to + 1/16" O/S they are getting pretty thin. I take them out to 1st oversize only, use `em then bin `em. :lol:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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