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Jim K · Post by **Jim K** » Sun Feb 26, 2006 4:33 am

To prove a point, I mock-assembled the Brembo + bracket on the spindle and hub and put it inside the 16" Compomotive MO, using spacers. True enough,there's just enough room for 332mm discs (yes, 332) with ~2mm caliper/wheel clearance.In real life, a 10.5mm thick alloy plate will go where the spacers are. With this setup, front brake swept area is 280sq" (total for both wheels) vs 196sq" for std brakes, but a lot more important than area increase is the huge mechanical advantage of the larger diameter.
Jim K.

Mats · Post by **Mats** » Sun Feb 26, 2006 5:43 am

Don't forget the lager mass for heat "storage" and dissipation.
Leverage is good but if you can lock up the wheels in 200Km/h+ there is no real gain.

MD · Post by MD » Sun Feb 26, 2006 1:58 pm

Matts from my viewpoint, the larger surface area will dissipate heat faster from convectional scrubbing and radiation and will take longer to build up heat as well. So there are obvious advantages for some circuits and less so for others.

Add to that the mechanical advantage which enables you to use it carefully makes this set up really attractive.

There is a weight penalty which can be offset to a degree with alloy composite rotors.

..anyhow, I am biased 'cause I have 16" wheels so I need to talk myself into it haha.

Just love that tricky little conversion brkt Jim.

Barry · Post by **Barry** » Sun Feb 26, 2006 8:26 pm

Hell Jim,I wish I had the use of bigger rims or at least a more modern rim on this car.....

disc is now 297mm,big reds and I still had to mill 2mm off the caliper AND clean the inside of the rim with a power sander....old stuff here...

Jim K · Post by **Jim K** » Mon Feb 27, 2006 11:13 am

Barry, the type of wheel is everything. In the 15" MO's I have the same setup with 310x28mm discs. As a matter of fact, Compomotive advertise their wheels for being some of the roomiest around for brakes. Some years ago, AP Racing had their disc application catalog configured around these wheels, so they could maximize size.

Mats · Post by **Mats** » Mon Feb 27, 2006 1:21 pm

Too bad they are British though. Brits can be the most troublesome and stubborn people in the world...

But then again, some of them are just the nicest and friendliest ever to do business with.

gtv11636 · Post by **gtv11636** » Mon Feb 27, 2006 2:53 pm

Forgive me all for turning off the subject here, but i would like to know what is the biggest size of brake discs that i can fit if using the original campagnolo 15 rims.

Thanks for the help

MD · Post by MD » Tue Feb 28, 2006 12:05 am

Go back one page for your answer

gtv11636 · Post by **gtv11636** » Tue Feb 28, 2006 12:22 pm

Thanks MD
But i can only find that Barry wrote the campagnolo wheels could not fit the 305 mm rotors (?) so what is the max for them ?

Thanks
Tomer

MD · Post by MD » Tue Feb 28, 2006 1:03 pm

Like I said, 310+reds for 15"MO's and 323+reds for 16". As you say though, the Compomotives are one of the roomiest wheels around.
Jim K.

Does this help?

Mats · Post by **Mats** » Tue Feb 28, 2006 3:00 pm

haha, can you read MD? Campagnolo and Compomotive is really not the same.

MD · Post by MD » Tue Feb 28, 2006 6:53 pm

matts,

It's all spaghetti to me.

la_strega_nera · Post by **la_strega_nera** » Tue Feb 28, 2006 7:16 pm

MD wrote:matts,

It's all spaghetti to me.

Compomotive are more like fish and chips? English I believe?

Jim K · Post by **Jim K** » Tue Feb 28, 2006 7:42 pm

What most are probably not aware of, is that Compomotive wheels are FIA Motorsport approved (besides being roomy for brakes, they are one hell of a strong wheel, which explains their higher than average prices).
Jim K.

Mats · Post by **Mats** » Wed Mar 01, 2006 1:45 am

Compomotive wheels are strong because they are designed for rallycars, that's why they are so bloody heavy as well.

Brakes