[6pack] Modifying Finned Aluminum Brake Drums

[Jerry C Shaw]

Hi Dave
Keep warm up there. CT got a lot of snow, too, maybe more than Maine.

In order to clear the backing plate, the 240Z drums need to be machined and 
the diameter of the drum enlarged 0.080" on a side by 0.500" into the drum, 
and both the center hole and the stud holes enlarged slightly. If you are a 
real stickler for detail, even the two holes for the small flathead 
retaining screws may be accurately found by first mounting the finned drums 
after you get them back, then placing an old iron drum backwards against the 
finned one, using the wheel studs as locators, and carefully marking the 
hole locations with drill of the correct diameter, but only kissing the 
aluminum to make the mark for final drilling.

I suppose the machine shop could have done the small holes, too, but I 
didn't think of it until I got home. It's probably just as accurate the way 
I did it.

For awhile, TRF was selling modified Brembo drums. Maybe they still do, but 
I purchased mine new off the internet and had a machine shop do the rest for 
about $70. There were complaints of deep scratches caused by TRF's 
suppliers.

See my car and these drums on
http://www.triumphowners.com/977

Jerry Shaw
1974 TR6 Mallard Green (newly restored)

Message: 3
Date: Sat, 12 Feb 2011 09:08:08 -0500
From: David Friedlander <forzion at maine.rr.com>
Subject: [6pack] Modifying Finned Aluminum Brake Drums
To: 6-Pack <6pack at autox.team.net>
Message-ID: <4D569448.5070905 at maine.rr.com>
Content-Type: text/plain; charset="us-ascii"

Good morning, list!

Spring, they say, is on the way... But, from here, it still looks like
there's way too much snow to think that way....

Does anyone have the specs for how to modify the finned aluminum
drums off a 240Z to fit the TR6?Any help/specs/drawings you could
send along would be *much *appreciated!

Dave Friedlander
CF25194U+O+TBI
Maine


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