There are a ton of threads on this. Also, the GD uses the same braking system so anything applicable to the GD is applicable to the GR.
There are a ton of dedicated track pad options out there. Popular ones are Hawk Blue, and the XP10/12 Carbotech pads. You could go more aggressive if you want. I'm guessing you wouldn't need it if you only do 4 track days a year. That's not particularly track junkie material.
I'm surprised those Stoptech pads worked at all on the track. They're not really designed for track usage which could be why you were getting pad deposits. The idea of using an aggressive pad to "clean" the rotor is a fairly simple concept. When high-temp pads are used at low tempatures (street use) they are using plain ole friction to stop the car. This means they're scraping the rotor as you stop effectively scraping off any uneven pad deposits.
You're not really specific enough to make a pad recommendation so I'll pull one out of my ass. Ferodo 2500s.
We need more info like tire compound, suspension mods, experience level, lap times on known tracks, etc.
There are a ton of dedicated track pad options out there. Popular ones are Hawk Blue, and the XP10/12 Carbotech pads. You could go more aggressive if you want. I'm guessing you wouldn't need it if you only do 4 track days a year. That's not particularly track junkie material.
I'm surprised those Stoptech pads worked at all on the track. They're not really designed for track usage which could be why you were getting pad deposits. The idea of using an aggressive pad to "clean" the rotor is a fairly simple concept. When high-temp pads are used at low tempatures (street use) they are using plain ole friction to stop the car. This means they're scraping the rotor as you stop effectively scraping off any uneven pad deposits.
You're not really specific enough to make a pad recommendation so I'll pull one out of my ass. Ferodo 2500s.
We need more info like tire compound, suspension mods, experience level, lap times on known tracks, etc.