[Fot] Al-Fin Drums

Wed Mar 5 17:02:26 MST 2014

Marcel,

Maybe those were a very, very rare factory option.  The drum-braked 1956 TR3 I
restored (TS9848-L-O) in the 1980s had Alfin drums on the front and I am
positive they were radial fins (i.e.: if you are looking at the drum while
alongside the car, you are looking at the edges of the fins).  They looked a
lot like the Datsun drums.  Since the car had iron drums on the back I can't
say what those would have looked like but I would be surprised if they were of
a different-looking design.

Duncan
(Texas)

Begin forwarded message:

> From: "Marcel Van Mulders" <van.mulders.marcel at telenet.be>
> Subject: Re: [Fot] Al-Fin Drums
> Date: March 5, 2014 at 3:00:49 PM CST
> To: "'John Styduhar'" <johnstydo at gmail.com>
> Cc: fot at autox.team.net
>
> Hi John,
> I only wrote down the comment in the Moss UK TR2-TR4A catalogue (paga A5)
> stating that their circumferential finned Alfin drums are "reproductions of
> the rare factory option". Maybe the early (TR2) drums were made like that,
> just like other sports cars of that time(Jaguar i.e.)
> I used both the Moss drums with rather small radially fins and their later
> circumferential finned drums, the latter are much stronger and are
> performing better. I believe taht the holes are promoting air circulation
in
> the drums, the pressure in the brake lines to the rear are 50-60 % higher
> than to the front, without brake fadeing (chelated metal linings)
> Marcel, Belgium.
>
>  _____
>
> Van: John Styduhar [mailto:johnstydo at gmail.com]
> Verzonden: woensdag 5 maart 2014 20:27
> Aan: Marcel Van Mulders
> CC: davehogye; Triumph 'Friends of Triumph
> Onderwerp: Re: [Fot] Al-Fin Drums
>
>
> If you look at page 5 on the Kastner Drive Preparation CD you will see that
> the alfin rear drums on the racing TR4 are radially-finned.  The photo
> caption says that these were a gift from the factory Competition
Department.
> So they were using a design similar to the Z-car.
> Hey Kas, can you shed some light on this?  Thanks
>
>
> On Wed, Mar 5, 2014 at 1:20 PM, Marcel Van Mulders
> <van.mulders.marcel at telenet.be> wrote:
>
>
> Years ago, Moss Europe was selling Alfin drums with radial fins, only good
> for looks but not for racing.
> Now, Moss is selling Alfin drums with circumferential fins, just like the
> factory option : these are very strong and longlasting in racing. I made a
> big hole in the backplate (1.5") and a row of 1/3" holes in the drums. I
> believe these holes are a great help for cooling by air circulation inside
> the drums
> Marcel, Belgium
> -----Oorspronkelijk bericht-----
> Van: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] Namens
> davehogye
> Verzonden: woensdag 5 maart 2014 16:39
> Aan: Todd Redmond
> CC: Triumph 'Friends of Triumph
> Onderwerp: Re: [Fot] Al-Fin Drums
>
>
> I think that I removed almost a half inch of material off to clear the
> backing plate. The drums were inexpensive and had Centric packaging. I
could
> get the part number if need be.
>
>
> Dave H.
>
>
> ----- Original Message -----
> From: "Todd Redmond" <alfetta95 at optonline.net>
> To: "John Styduhar" <johnstydo at gmail.com>
> Cc: "Triumph 'Friends of Triumph" <fot at autox.team.net>
> Sent: Wednesday, March 5, 2014 6:57:01 AM
> Subject: Re: [Fot] Al-Fin Drums
>
> Yep! That's the loving i meant.
> Thanks John.
>
> Sent from my iPhone
>
>> On Mar 5, 2014, at 9:51 AM, John Styduhar <johnstydo at gmail.com> wrote:
>>
>> II think the loving that Todd was talking about is to enlarge the
>> Z-car drum's center hole slightly to slip over the axle hub and to
>> machine the outside lip of the stock TR brake backing plate to fit
>> into the recess between the drum's steel lining and the aluminum
>> casting around the perimeter of the drum. That worked for me.
>>
>>
>>> On Tue, Mar 4, 2014 at 7:22 PM, Robert M. Lang <lang at isis.mit.edu> wrote:
>
>>>
>>> Hi,
>>>
>>> I was putting together a list of "Stuff" for a possible new Triumph
>>> racer and I noticed none of the usual places (US suppliers) have
>>> al-fin drums listed now...
>>>
>>> Anyone care to comment on availability?
>>>
>>> We're talking 9" drums for TR6 and probably TR4.
>>>
>>> I saw them on the Brit sites, but not on the US web sites.
>>>
>>> Regards,
>>> rml
>>> ------------------------------------------------------------
>>> ---------------
>>> Bob Lang Triumph TR6!! | This space for rent Former NER Solo Chair |
>>> Voice:617-253-7438 | Cell: 339-927-4489
>>> ------------------------------------------------------------
>>> ---------------
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