Gravel brake set up on E36 M3 15" wheels

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Gravel brake set up on E36 M3 15" wheels

Postby keithr » Tue Apr 03, 2018 12:35 pm

Looking to swap tarmac brakes on my E36 M3 coupe to gravel set up for use with 15" wheels.

Front is currently E36 M3 Evo hub with M5 disc and AP 6 pot calliper fitted. Rear is E46 trailing arm with E46 M3 std rear brakes. Anyone have any advice on what might be a straight bolt on set up using Bmw parts? I know a lot of people are using the std non M3 front E36 set up for gravel but not sure if callipers will bolt onto the E36 Evo front hub.
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Re: Gravel brake set up on E36 M3 15" wheels

Postby Overthelimit » Tue Apr 03, 2018 3:34 pm

Hi,
I use late model 323/328 e36 discs and calipers all round with ds2500 or 3000 pads.
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Re: Gravel brake set up on E36 M3 15" wheels

Postby keithr » Wed Apr 04, 2018 10:00 am

Overthelimit wrote:Hi,
I use late model 323/328 e36 discs and calipers all round with ds2500 or 3000 pads.


Thanks, I was wondering if they are straight bolt onto the M3 hubs I have. May have to just get some and see if they fit.
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Re: Gravel brake set up on E36 M3 15" wheels

Postby Overthelimit » Wed Apr 04, 2018 5:38 pm

The main casting is different, I think the actual hubs are the same from memory.
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Re: Gravel brake set up on E36 M3 15" wheels

Postby martine30rally » Thu Apr 05, 2018 9:36 am

brake mountings are different between m3 and other e36
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Re: Gravel brake set up on E36 M3 15" wheels

Postby keithr » Thu Apr 05, 2018 1:04 pm

martine30rally wrote:brake mountings are different between m3 and other e36


Thanks, need to come up with another plan or ditch the M3 hubs for gravel.
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Re: Gravel brake set up on E36 M3 15" wheels

Postby Overthelimit » Thu Apr 05, 2018 8:53 pm

Its a pain. heavy car needs big brakes for tarmac, but you cant have 17" gravel tyres. apparently the FIA has set an overall tyre diameter limit, so 17" isnt possible.
You've either got to swap brake setups each time between forest/tarmac events or just use the small brakes on tarmac. They are ok until you get up to M3 power, then they can fade a bit at some events.
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Re: Gravel brake set up on E36 M3 15" wheels

Postby keithr » Fri Apr 06, 2018 10:25 am

Overthelimit wrote:Its a pain. heavy car needs big brakes for tarmac, but you cant have 17" gravel tyres. apparently the FIA has set an overall tyre diameter limit, so 17" isnt possible.
You've either got to swap brake setups each time between forest/tarmac events or just use the small brakes on tarmac. They are ok until you get up to M3 power, then they can fade a bit at some events.

Thanks, looks like only way to get std BMW brakes to fit under 15" wheels is if I use non M3 hub front castings and non M3 rear training arms. Would be nice to keep the M3 hubs front/rear and just change the disc/calliper for gravel but looks like this would need bespoke callipers and brackets.
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Re: Gravel brake set up on E36 M3 15" wheels

Postby Overthelimit » Fri Apr 06, 2018 9:18 pm

We just use non m3 on the rear all the time. They seem to be perfectly adequate
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