[Fot] knockoff Datsun brake drums

[Yellow04]

The consensus is the OEM Datsun drums are the best Al-Fin alternative that is somewhat available. Finding a pair that are not run out is not so easy any more. I have two pairs on my shop floor now that are over 230mm, the max size embossed on the drum. I am thinking I might arch my shoes to fit the oversize drum, but at some point that steel band in the aluminum drum will be compromised by being too thin, not sure I want to find out what too thin is!

John, there are two things you need to take into account with regard to your blue spots showing up in your rear brakes. First, sure, you added rear brake by increasing the bore size of your wheel cylinders. Second, your lap times are going down, you are going faster. The faster you go, the bigger this problem will become. This is a good problem, but your days of running stock brake material may be coming to an end!

www.ctbrakes.com 

> -----Original Message-----
> From: Fot [mailto:fot-bounces at autox.team.net] On Behalf Of John Styduhar
> via Fot
> Sent: Monday, June 26, 2017 3:54 PM
> To: Spitfire Racing <spitfire_racing at twcny.rr.com>
> Cc: Triumph 'Friends of Triumph <fot at autox.team.net>
> Subject: Re: [Fot] knockoff Datsun brake drums
> 
> ​I use stock TR rear brake shoes with my OEM datsun Z drums and had no
> cracking problem in two seasons of racing.  But since I upgraded to the 7/8
> inch bore rear wheel cylinders this year, I have a lot more rear brake and now
> see bluish spots around inside of the lining probably from overheating. ​ Way
> more brake dust in the drums now.
> 
>