Miatapower List Archive

This read-only message was archived from a public mail list.
Mail From: "Brian Goodwin" <(email redacted)>



----------
> From: Shiv S. Pathak <(email redacted)>
> To: (email redacted)
> Cc: Miata Mailing List <(email redacted)>
> Subject: MMC brake rotor and white wheels
> Date: Wednesday, December 09, 1998 1:07 PM
>
>
> Funny story. I've been using 14" MMC (metal matrix composite) rotors on
the front
> end of my RX-7 for a few months now. MMC is a lightweight aluminum alloy
touted to
> dissapate heat far faster than traditional grey iron rotors. They shed
heat very
> quickly indeed. Maybe a bit too quickly. I've noticed that they shed
heat into my
> Volk TE37 wheels! So much in fact, that over the past several track
events, my front
> white-painted wheels have been cooked to a subtle yellow tint on the
spokes. Looks
> pretty cool. I think I'm going to rotate to make it match with the rears
:)
>
> Still some growing pains with the first prototype system (rotors are a
bit too thin
> and calipers need larger pistons for proper biasing). I'm going down to
LA on Monday
> for an improved system (larger piston'd "big red" Brembo calipers and
1.25" thick
> rotors. The heavily used (already used on a race car for a season) 1.1"
thick rotors
> I'm using now quickly developed a few hairline cracks either due to
previous race use
> or from being too thin for my application. In 9000 miles, however, the
look and work
> the same as the day I got 'em. Can't get them to warp either.
>

Shiv,

I love the idea of rotors that weigh one third as much but want to run 14
or 15 inch wheels (both on the street and at the track). Any idea if there
are plans to make these in a smaller size at some point?

Brian Goodwin
Good-Win Racing Supply



> Shiv
> Project RX-7

This read-only message was archived from a public mail list.
Mail From: (email redacted) (Mike Inman)


I spoke with the Canadian distributor of "Cool Rotors" MMC
rotors specifically about a Miata application, he asked the
weight of the car and size of the stock rotors, I told him
2200lbs (a bit light) and 10.5" (a bit large?), he did some
calculations and came up with 300mm (shade under 12")
as the recommended size of MMC rotor for this application,
with concerns of melting, etc. for smaller rotors.

Again, the website is:


fastauto.com

Personally, if I were going to drop $1500+ into an experimental
brake system, I'd want something a bit on the large side, would
be a shame to have $900 worth of rotors crack, shatter or melt.

Mike

At 04:35 PM 12/9/98 -0800, you wrote:
>
>
>
>----------
>> From: Shiv S. Pathak <(email redacted)>
>> To: (email redacted)
>> Cc: Miata Mailing List <(email redacted)>
>> Subject: MMC brake rotor and white wheels
>> Date: Wednesday, December 09, 1998 1:07 PM
>>
>>
>> Funny story. I've been using 14" MMC (metal matrix composite) rotors on
>the front
>> end of my RX-7 for a few months now. MMC is a lightweight aluminum alloy
>touted to
>> dissapate heat far faster than traditional grey iron rotors. They shed
>heat very
>> quickly indeed. Maybe a bit too quickly. I've noticed that they shed
>heat into my
>> Volk TE37 wheels! So much in fact, that over the past several track
>events, my front
>> white-painted wheels have been cooked to a subtle yellow tint on the
>spokes. Looks
>> pretty cool. I think I'm going to rotate to make it match with the rears
>:)
>>
>> Still some growing pains with the first prototype system (rotors are a
>bit too thin
>> and calipers need larger pistons for proper biasing). I'm going down to
>LA on Monday
>> for an improved system (larger piston'd "big red" Brembo calipers and
>1.25" thick
>> rotors. The heavily used (already used on a race car for a season) 1.1"
>thick rotors
>> I'm using now quickly developed a few hairline cracks either due to
>previous race use
>> or from being too thin for my application. In 9000 miles, however, the
>look and work
>> the same as the day I got 'em. Can't get them to warp either.
>>
>
>Shiv,
>
>I love the idea of rotors that weigh one third as much but want to run 14
>or 15 inch wheels (both on the street and at the track). Any idea if there
>are plans to make these in a smaller size at some point?
>
>Brian Goodwin
>Good-Win Racing Supply
>
>
>
>> Shiv
>> Project RX-7
>