Great video Jon, I hope to do a trackday their next year. I also have the GT3 brakes on my car and noticed the same thing you did, the pedal is not as hard as when I ran the stock calipers, I bleed them after each trackday but the pedal still feels a little softer.

 

I've had some suggestions that maybe the issue is that the GT3 calipers move more fluid, and this leads to more pedal travel. The solution suggested is to use a bigger master cylinder. I'm looking into it...

Jon

 

Looks like a lot of fun. I was signed up for this past weekend & had to pull out last minute due to an issue with my car. My friend Craig (86 Black Turbo) was there instructing. He said the weather was great. I heard that one of the folks (name withheld) put his GT3 into the tires Friday night. Hopefully it's not hurt too badly.

 

I was told that the number of pistons is different, but fluid volume is the same for both 4 and 6 piston calipers. I had to bleed mine a couple of times but they firmed up once the air was out of the system.

 

Sorry you couldn't make it. I really would like to meet more of the 6speeders... Craig's license plate is Z-something 930?

Indeed, I came up on that incident shortly after he went in, and several others had spun in the fluids. Apparently he just lost it going into the keyhole. It will probably be north of $10k to fix, but no injuries. It happens.

Jon

 

Good driving! thanks for the video.