Drilling drums and discs
Turbo Mini Forums

Hi,
First idea: drill drums to vent them better. I've seen it's been done for year in the US. Did someone try that ?
Second idea: drill and groove standard not vented discs. Did someone try that ?
May be it's better to just groove them to avoid weakening discs.
Thanks

Edited by alpa on 29th Jun, 2010.

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

well you can get off the shelf drilled and groved disks and i gont see why you couldnt drill a drum but im not sure i would want to

Drives
-Ford S-max Mk2 Ecoboost
-Rover 100 VVC #2 - track project

Searching is all you need on TurboMinis

Why not ?
Drilled discs are supposed to be made of better material, not sure it's true for Mini discs.

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

well concidering where the drum has its frection plate there arent many places you can then drill to save enough weight to make it worth while and still be safe and not failing on you

Drives
-Ford S-max Mk2 Ecoboost
-Rover 100 VVC #2 - track project

Searching is all you need on TurboMinis

just get some superfin drums and drilled and grooved discs, this way you know is going to do what you want, and your discs and drums shouldn't crack on you!

Drilling is not to save weight, it's to improve cooling and dust/water evacuation.
Most of the drum weight is in the center plate.

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

Where do you find superfin drums ?

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

mini spares and lots of other sites, they are alloy finned drums to help cooling :)

Drives
-Ford S-max Mk2 Ecoboost
-Rover 100 VVC #2 - track project

Searching is all you need on TurboMinis

On 29th Jun, 2010 Vegard said:

Water evacuation? If there aren't holes, water wouldn't get in in the first place

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

you need to apply the simple formula

DH+B=D

maccamcvey
Sorry, I studied maths for the last time 15 years ago. Could you develop the formula please.

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

My guess was
drill holes+brakes=death

In boost we trust

Serious guess :) .
Actually people drill drums on US old days cars, it's been used in old race cars.
Opinion of other people is always interesting to me.

Edited by alpa on 29th Jun, 2010.

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

I dont see the point! The only reason you would want to modify the original drums is to save weight. Any form of drilling the drums will only weaken them.
Ive never seen water ingress into a drum assembly, at least not any that would cause concern.
Dust build up can be reduced by regular servicing which should be carried out on any vehicle.
I got alloy drums from minisport and had them on for ages with no problems.

grooved and drilled discs are not that expensive and can lightened drums make up for the extra weight a 165 tire carries vs a 145 ?

There might be less sensible area where to gain weight ?

Rusty by nature

Why not to buy alloy drums and grooved discs ?
Why not to buy a race Mini instead of bothering myself to make a turbo engine and modify the car ?
Why not to buy a 140hp race Marcos, 900hp GTR or a fight jet ?
Why not to pay someone to live my hard and dangerous life (I've been told life may be lethal) and just stay quite ?

I think the question is: why not ?
We (well manufacturers) drill and groove discs. For a bunch of reasons. So why not drums ? Why holes and scars would work on a flat surface and would not work on a round one ?

Edited by alpa on 29th Jun, 2010.

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

BAC

on tmf?

BAN?.

why not, if the pro's out weigh the con's in your eyes then the benefits are seen in your eyes

in my opinion my brakes should not be modified by me, i would leave standard or buy from a reputable manufacture (in hope they was tested before retail)

Yes i moved to the darkside

Instagram @jdm_brett

So far the only con argument was that drilling would weaken drums. That seems to be exactly the same argument that was used 50 years ago in the US. I still don't see how a few 20 4mm holes would weaken the drum.
Well I'll see.

std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm

maybe if you drilled them in at an angle so they self vent?