For those that have used the 2-piece rotors on track (especially ECS) and before that used blanks, was there a noticeable in fade resistance/cooling? I've upgraded my PP brakes on a '16 GTI to the Macan Brembos using 345mm blanks and my first track session was pretty fade heavy with Raybestos ST-43 pads, RS3 deflectors, ATE200 fluid and trimmed dust shields.
Hoping to hear that 2-piece rotors with directional veining and slots bring a lot of cooling into the system before I scrap the Brembos altogether and just get an ST40 328mm BBK for 17" wheels as the ECS 2-piece rotors are $650. I don't think the ST40 4-pot calipers warrant enough of a difference to spend the extra $1500 there for the brand new BBK compared to the Brembos. Bumping up to Motul600 or similar should also help with boiling/fade if ATE200 just isn't cutting it but would rather focus on dropping temps than high temp band-aids.
I have the stock PP brakes.
I went from stock rotors to girodisc 2 piece and saw a noticeable difference. I have temp paint, the girodisc are actually cooler
However, the inside of my wheels got hotter a bit. I speculate that it has to do with how they pull air compared to stock. One seems to pull it from front vs back.
Having said that, with good pads I did not have pad fade even on stock rotors. I have taken the car to Laguna Seca that is tough on brakes with stock, ds2500 and cobalt friction xr2/xr4. I cooked the stocks in 3 sessions. The ds2500 were good, but slowly fading at the end of each session. The cobalt friction are awesome.
I have the rs3 air ducts, that do nothing. I removed the GTI logos which actually helped on the outside fronts.
I periodically rebuild my calipers, about once per year. I have motul fluid, which I managed to boil when the pads were low and the fluid was close to a year old. So now I keep an eye out for it. I do cool down laps in the paddock a bit, it seems the worst is to park the car with 500 or 600 temps on the rotors. I try to get it down to 300 before I stop
On track the fronts are at 1400 or so. Kind of need pads to deal with it.