nice brake upgrade

[NoHachi]

Hi, no problem boo50

First of all, I really didn't think much of brakeproblems until my friends started having huge issues (200-240 rwhp@900-1000kg). Stock power figures really baby the brakes and the increase in loads with extra hp is amazing. All this is assuming that you are a seriously capable driver that can get within 95% of the cars max envellope (aka not me)

The only thing that would work is 20mm x 280mm discs that take their cooling air from the inside (! important..example: 280mm Corrado discs suck air from the outside and would overheat earlier then stock 260mm miata discs). From the inside you can lead cooling ducts to the intakes(must). This combined with the best pads money can buy (either Pagid or Carbone Lorraine) and 4 pot callipers.

After one lap of the nordschleiffe this set-up starts making strange noises and needs to cool down (lap times approx 8min00). Add a 90kg passenger and fading occurs in each downhill sector. Add 40 more whp and fading occurs after 15kms.
The 240whp car is now experimenting with brake duct fans..electric fans forcing air through the air ducts.

Brake fluid recirculators are the second option. Basically they are a check valve that you attach to the inlet and outlet nipples of your callipers. Every time you release the brakes, new fluid is sucked into your callipers and the old fluid passes through the check valve. Usually the check valve is combined with an alloy heat sink to reduce fluid temps. This is a cheap and easy way to reduce fluid temps inside the callipers, but its effectiveness depends on calliper design.

The big trouble with small radius discs is that they have very little surface area to radiate heat. Making them thicker increases their heat sink capability, but doesn't do much for cooling area..that will be your biggest challenge. You are almost automatically stuck with expensive discs..might be cheaper to just run 15s and and off the shelf brake sets.

Good luck