The G37S is a great track car
#556
I have another track day at Road America on April 30th so I figured I would order some more track brake pads and finally get the Z1 slotted 2pc. rotors for the front. My rotor decision was sped up by the fact that the last track day at Road America did cause some small surface cracks you can see below.
Spencer at Z1 talked me into trying out the Carbotech XP12 pads up front and XP10's in back. It looks like they go up to a little higher temp than my Hawk DTC-60's and I like the fact they claim to be easier on rotors. They are supposed to last longer too, but I tried Carbotech on my WRX years ago and they were easier on rotors, but they crumbled and wore really quickly. Hopefully they have changed. Anyone else running
Spencer at Z1 talked me into trying out the Carbotech XP12 pads up front and XP10's in back. It looks like they go up to a little higher temp than my Hawk DTC-60's and I like the fact they claim to be easier on rotors. They are supposed to last longer too, but I tried Carbotech on my WRX years ago and they were easier on rotors, but they crumbled and wore really quickly. Hopefully they have changed. Anyone else running
#557
Cool, it sounds like we are running a very similar set up. Curious to hear your thoughts about your brakes after your track day
#558
So I think I may have found a solution to my leaking coolant overflow tank cap when the coolant sloshes around on track. I initially tried a black rubber O-ring, but it was too thick. Then I went to Home Depot and picked up a thin gasket for a faucet. Just the right thickness. Hopefully, it holds. I'll find out at Road America on May 30th.
This kit includes 2 of the red gaskets
This kit includes 2 of the red gaskets
#560
- did a very good job of bedding them in on the street. Did a half dozen 40-5 mph stops, with 60 sec of cooling in between. Afterwards, you could tell there was a good bit of pad material bedding into the rotors, but there wasn’t much ‘blue’ heat discoloration.
- after watching this video (
- trailered the car to Atlanta Motorsport Park in Dawsonville, GA. First Intermediate 1 session was in the wet, but drying. Did several 100-20 stops, just to verify the brakes were good. Brakes are PHENOMINAL!!
- second session, got to playing with a new M3, and a coyote swapped 96 Mustang GT with a complete road race setup( 98 Cobra IRS, Cobra brakes, tubular front subframe, Maximum Motorsport suspension, etc). The M3 could not keep up. I was more/less right on with the Mustang.
- toward the end of the session (lap 9), I came across start/finish at 115 mph, hit the brakes for the hard turn 1 left hander, and pushed the brake pedal to the floor. Brakes were gone. Scared half the crap out of me. Luckily I got it hauled down pumping brakes and downshifting. Didn’t put it into the sand thank goodness. Cooled it down on way to the pits (and very little braking).
- I’m now a card carrying member of the ‘Gold’ Akebono crew. Boiled the RBF600 off in the calipers.
- after cooling down, I backed off on my super hard turn 1 braking. I still had a great time.
- session 5, felt the backend lift off going into right hand turn 16 at about 105 mph. Counter steered and straightened it out. Felt it get light in the left hand carrousel. That was it, I’m done for the day. I think I had burned off so much fuel, the backend got real light (I was less than a 1/4 tank by then). Plus in the heat of the afternoon , the RE71Rs were getting gummy.
- put her back on the trailer safe and sound.
- drove it to work this morning.
That XP12/10 is a killer combo. I need to invest in some brake duct cooling next.
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4DRZ (05-22-2018)
#561
Glad to hear that the brake pads work well, but pretty scary about cooking your fluid coming down from 115. I wonder if you are on the brakes just a touch too long. It's not tough to do. I cooked my stock clutch fluid once before upgrading just by keeping the clutch in a touch too long.
Before I got brake ducts and some more performance parts at Road America I was coming down from 120-130 in 3 places and never had any issues. Now with front brake ducts and more go fast bits on the same track I am coming down from 130-140 without issue in the same 3 spots.
So you pulled on a new M3 on the straight? That is amazing as they have a ton more torque that we do. What do you have done to your car for power? Sedan or coupe?
There was a new M3 at my last track day in April at Road America and he was running 2:41's and I was running 2:51's ringing the cars neck. He was in a lower run group than me just dominating so I am not sure where he was making time on me, but I would imagine it was the long straights.
Before I got brake ducts and some more performance parts at Road America I was coming down from 120-130 in 3 places and never had any issues. Now with front brake ducts and more go fast bits on the same track I am coming down from 130-140 without issue in the same 3 spots.
So you pulled on a new M3 on the straight? That is amazing as they have a ton more torque that we do. What do you have done to your car for power? Sedan or coupe?
There was a new M3 at my last track day in April at Road America and he was running 2:41's and I was running 2:51's ringing the cars neck. He was in a lower run group than me just dominating so I am not sure where he was making time on me, but I would imagine it was the long straights.
#562
Registered Member
Gonna raise my hand for the Carbotech club as well. XP10/8 here on Hankook RS3s, but like Splitter I'll be moving up to 12/10 as well when these are done.
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4DRZ (05-22-2018)
#563
Glad to hear that the brake pads work well, but pretty scary about cooking your fluid coming down from 115. I wonder if you are on the brakes just a touch too long. It's not tough to do. I cooked my stock clutch fluid once before upgrading just by keeping the clutch in a touch too long.
Before I got brake ducts and some more performance parts at Road America I was coming down from 120-130 in 3 places and never had any issues. Now with front brake ducts and more go fast bits on the same track I am coming down from 130-140 without issue in the same 3 spots.
So you pulled on a new M3 on the straight? That is amazing as they have a ton more torque that we do. What do you have done to your car for power? Sedan or coupe?
There was a new M3 at my last track day in April at Road America and he was running 2:41's and I was running 2:51's ringing the cars neck. He was in a lower run group than me just dominating so I am not sure where he was making time on me, but I would imagine it was the long straights.
Before I got brake ducts and some more performance parts at Road America I was coming down from 120-130 in 3 places and never had any issues. Now with front brake ducts and more go fast bits on the same track I am coming down from 130-140 without issue in the same 3 spots.
So you pulled on a new M3 on the straight? That is amazing as they have a ton more torque that we do. What do you have done to your car for power? Sedan or coupe?
There was a new M3 at my last track day in April at Road America and he was running 2:41's and I was running 2:51's ringing the cars neck. He was in a lower run group than me just dominating so I am not sure where he was making time on me, but I would imagine it was the long straights.
#564
Registered User
iTrader: (1)
I have titanium shims and brake ducts in front and even with the XP10/8 at COTA on a 115 degree day I did not get brake failure.
I didn't go incrementally so I can't tell what was the deciding factor, but the package works well, so I hope you have the same experience.
I also have nicely silver brake calipers and hope to never join the brown club!
I didn't go incrementally so I can't tell what was the deciding factor, but the package works well, so I hope you have the same experience.
I also have nicely silver brake calipers and hope to never join the brown club!
#568
Yes, no power or suspension mods. I’m probably going to do sway bars next once I get the brake cooling sorted. So, my headrest pushes my helmet too far forward. I’d forgotten about it until I was in que to get on track. I tried flipping it 180 but it didn’t work. So I just pulled it off the rest of the day. The camera was a Hero Session 4.