[Dave-ROR]

Originally Posted by ft_sjo

I think you've assumed i'm not also changing calipers. I can assure you that is not the case.

I appreciate what you're trying to say about rotating mass - I have found that it doesn't really become an issue (gyroscope effect) until you get to ~380mm or larger.

I assumed that you would switch calipers too. My point was just that larger rotors increasing feel is something I haven't experienced. Other parts often involved in that will, but you can increase rotor size without replacing calipers, etc (custom brackets, different brackets, etc).

I tend to follow this path:
1. If I beat on the car on track for extended periods of time, does it fail?
2. If yes, what's the best way to resolve it without increasing mass?
3. Does that change require a rear brake change to resolve any bias issues? If so, are more agressive pads (up to a point) enough?

That's simplified a bit, but... basically I want AS SMALL of brakes as I can get away with. If I can make them lighter and cheaper overall than stock that's a great bonus. I never want more thermal mass than I *need* because it's not as ideal as having "just enough". I currently run ~more or less OEM diameter rotors, they are just a lot thicker with a lot better cooling. They hold up to abuse and have help up to boosted track cars without issue so I just will never see the *need* for huge brakes on these.