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#473901 - 24/09/17 08:46 AM Brake drum thinking
SteveT Offline

Talk Morgan Expert

Registered: 22/05/14
Posts: 2364
Loc: Forest of Dean, Gloucestershir...
I have a couple of winter jobs in mind on the Healey. One is to sort out a slight but annoying vibration from the back end above 65. It's not wheel balance, nothing looks bent or running out of line. Talking to other owners it seems that rear brake drums often cause this if out of balance. They are a big lump of cast so it makes sense. So I can buy new balanced drums that also come vented for between £35 and £85 each which is probably cheaper than getting the originals balanced, but then I see I can also get alloy Alfin ones for double that, they look pretty cool with finning although in reality I'm not sure how much you would see through the wire wheel anyway.

Has anyone ever fitted Alfins or is it just as easy to stick with the cast ones.. It's road use only thinking
_________________________
Steve

1967 Austin Healey 3000 Mk3

Wild Mogs – It’s a right carry on!

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#473903 - 24/09/17 09:03 AM Re: Brake drum thinking [Re: SteveT]
Jays Offline

Member of the Inner Circle

Registered: 08/02/11
Posts: 13167
Loc: Cumbria UK
Go with the Alfins Steve....they look cool!
_________________________
Jay

2009 Roadster 3.0 "NERO"


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#473908 - 24/09/17 09:23 AM Re: Brake drum thinking [Re: Jays]
SteveT Offline

Talk Morgan Expert

Registered: 22/05/14
Posts: 2364
Loc: Forest of Dean, Gloucestershir...
Originally Posted By Jays
Go with the Alfins Steve....they look cool!


No surprise on your choice J wink

Any expert views on the merits of alloy drums over cast ones? Presumably less mass might remove the need for balancing?

_________________________
Steve

1967 Austin Healey 3000 Mk3

Wild Mogs – It’s a right carry on!

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#473935 - 24/09/17 12:59 PM Re: Brake drum thinking [Re: SteveT]
Hamwich Offline

Part of the Furniture

Registered: 28/04/08
Posts: 4899
Loc: Gloucestershire, UK
Aren't alloy drums supposed to be better at dissipating heat than cast iron? Either way, if they are lighter then any out-of-balance forces are going to have less of an effect.

Plus they look way cool.

I vote for the Alfins too!
_________________________
Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 1957 R4 CV, 2005 Ferrari Vipar

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#473937 - 24/09/17 01:27 PM Re: Brake drum thinking [Re: SteveT]
Stringers Best Mate Offline

Charter Member

Registered: 16/10/13
Posts: 5109
Loc: Northamptonshire UK
Just looked at AH Spares & they quote the Alfin's as being 2.4kg lighter..!! That's a big chunk & would go a long way to ceasing the small vibration you feel especially if they are balanced as well.

Not sure if you'd see much of them through the spokes of course, but since when has that ever stopped us buying something that you want rather than need, eh..?

Alfins it is, then..
_________________________
Steve


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#473958 - 24/09/17 04:13 PM Re: Brake drum thinking [Re: SteveT]
howard Offline
Talk Morgan Addict

Registered: 01/01/09
Posts: 3035
The reason that modern cars use discs is that they dissipate heat much better than drum. It follows that an alloy finned drum with a bigger surface area and better heat conductivity would be an improvement - but only if brake fade from the rear is an issue for you. Otherwise, like 6 inch exhausts on a Clio, they would be all about posing.

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#473973 - 24/09/17 05:29 PM Re: Brake drum thinking [Re: howard]
Stringers Best Mate Offline

Charter Member

Registered: 16/10/13
Posts: 5109
Loc: Northamptonshire UK
Originally Posted By howard
all about posing.


Of course, you know him too, Howard..

rofl
_________________________
Steve


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#473989 - 24/09/17 06:51 PM Re: Brake drum thinking [Re: Stringers Best Mate]
SteveT Offline

Talk Morgan Expert

Registered: 22/05/14
Posts: 2364
Loc: Forest of Dean, Gloucestershir...
Originally Posted By Stringers Best Mate
Originally Posted By howard
all about posing.


Of course, you know him too, Howard..

rofl


Says the man with the biggest horn on TM! rofl
_________________________
Steve

1967 Austin Healey 3000 Mk3

Wild Mogs – It’s a right carry on!

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#474035 - 25/09/17 12:49 AM Re: Brake drum thinking [Re: SteveT]
Dave Turner Offline
Just Getting Started

Registered: 15/10/12
Posts: 98
Loc: Calgary Alberta Canada
I have alloy drums on my plus8 , they are Alfin from a Datsun Z . When I installed them they were difficult to find and commanded a fairly high price , there were some offshore reproductions available but I was warned off then as many were reporting failures , I would look into that before proceeding.
Instructions for machining and installation was on the gomog website .
And yes you can see then through the wires
Dave

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#474061 - 25/09/17 11:53 AM Re: Brake drum thinking [Re: SteveT]
B3MOG Offline
New to Talk Morgan

Registered: 05/02/13
Posts: 20
Loc: north yorkshire
why not change to discs on the rear and put an end to inferior parts supply problems, i changed my plus eight to rear discs because of the poor quality of rear slave cylinder supply.

David Byrne

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