Montag, 18. September 2017

4. Upgraded brake

The Mantula already had a uprated brake system. 4 pot calipers with a vented 260mm disk.
Wow... but after driving around some km and force the brake a bit more I found , that stopping 4 times from 100 miles down to zero was enough to smell the brake inside.
Thats a no go!
A closer look shows, that the venting holes are open to the outside - to the wheels and not to the inside - the engine. This prevented the brake disks to get cold air through the veted disks because at the wheels there is a low pressure are caused by the high air flow around the car. So I can not install a forced cooling with a brake ducts from the front of the car.

- Brake disk vent openings are on the wrong side
- Forced cooling is possible only with other disks
- Brake ducts are not easy to install cause the complete front is flipping
- Brake ducts have to be custom made

I started to search in the web a replacement for the disks. Nothing will fit to the original GT6 setup - even the same lump as I already have or much smaller ones.
Then I started searching a brake disk, which will fit inside of 15" wheels, has the vent opening to the inside and will fit the hub.
I ended up with a 283mm diameter and 22mm width disk.

Left is the old setup, on the right side the new one:

Additional to the bigger brakes I ordered the big axles from Cannleys Classic.

From the top:



With the wheels on  you see, that it is the maximum which will fit with this rim. 13" or 14" will not fir anymore.

Bigger brakes is the one thing, the othe ris a good foced cooling for them:
More in the next post...