IND plans to take advantage of the improved brake system found in the F8x M cars by further developing those components, including drop-in brake pad and rotor solutions from industry leaders like Race Technologies and Girodisc, along with pad and fluid packages that will help make the M4 a performer in harsh track environments. Our developments here will help the M community enjoy their cars in HPDE and road course lapping days by making simple, relatively low cost modifications.
With that said, the F8x M cars continue to suffer from BMW M’s tendency of opting for very large brake calipers with a high performance appearance, but coupling those with relatively small brake pads with limited effective swept area. It is this attribute that I wanted to elaborate on in this thread. Brake pad swept area is a contributing factor in nearly all aspects of braking performance, and impacts everything from overall generated friction, to temperature dissipation and rotor wear.
I’ve created a number of CAD drawings in SolidWorks of both the OE BMW brake pads, and a Brembo GT front pad for comparison purposes, to illustrate the difference in swept area between the two kits. My analysis of each pad’s respective area gave the following results:
M3/M4 OEM front: 71cm²
M3/M4 OEM rear: 40cm²
Brembo GT front: 95cm²
Brembo GT rear: 62cm²
The top pads in the below photo are from Brembo’s GT big brake kit, while the bottom pads are part of IND’s OEM fitment performance pad development program.