Jay's 13' Wolfsburg Track Car Build

[Roadrunner_GTI]

Well Gingerman was eventful. Someone dumped fluid at t2 and .y tires turned to ice, went sliding off the track and my rad hose popped off dumping my water. Quick track repair and I was back out. The rest of the day was good, my tires are shot. I have a fresh set of rs4's but wanted to get one more day out of the old ones. They are shot now lol. After the last session I noticed my rotor was cracked ordered a new set. Gotta swap rubber and rotors before June 13 at Blackhawk Farms. Grattan June 26.
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Glad to see you out enjoying the car again. Are you still running distilled water / VP cool down mix? I’m about to switch, guessing I’ll need 2 bottles.

 

[KollinWithaK]

What rotors were those?

 

[jay745]

Glad to see you out enjoying the car again. Are you still running distilled water / VP cool down mix? I’m about to switch, guessing I’ll need 2 bottles.

Yeah. I need to drain the system, had no access to distilled so I used all our drinking water

What rotors were those?

Stoptech st40 bbk 2 piece.

 

[jay745]

Time for fresh rubber and new rotors

 

[Roadrunner_GTI]

For what it’s worth Jay, the new rotor casting is different from the older design. Talked with Dave from Zeckhausen and confirmed the changes. New one on the left below:

I did go ahead and order some spare rotor hats to go along with my rings, to have a full set of rotors ready in the event I crack one at the track. Carrying only the rings with me would be a pain to try to swap hot in between sessions.

 

[jay745]

For what it’s worth Jay, the new rotor casting is different from the older design. Talked with Dave from Zeckhausen and confirmed the changes. New one on the left below:
View attachment 215764

I did go ahead and order some spare rotor hats to go along with my rings, to have a full set of rotors ready in the event I crack one at the track. Carrying only the rings with me would be a pain to try to swap hot in between sessions.

I noticed they were different when I was installing them just now. I wonder what the different design improves. And yeah replacing the hats at the track would be a pain.

 

[Thumper]

I noticed they were different when I was installing them just now. I wonder what the different design improves.

Looks like the vanes on the inner ring were changed, enclosed almost. Maybe increase surface area to help with cooling?

 

[torga]

Looks like the vanes on the inner ring were changed, enclosed almost. Maybe increase surface area to help with cooling?

It's an interesting change because it feels like the older design would be a bit better and scooping air out. But it's gotta be something... because it doesn't really strike me as a cost-savings measure, either.

 

[ChrisAttebery]

It looks like the new rotors have thicker plates. It also looks like they took a rotor with a smaller ID and bored it out. In doing so they cut the aerodynamic ends off the vanes.

 

[torga]

It looks like the new rotors have thicker plates. It also looks like they took a rotor with a smaller ID and bored it out. In doing so they cut the aerodynamic ends off the vanes.

I'm almost positive the plates are the same thickness. The more aggressive chamfers on the old design are tricky and make it seem like the new design is thicker.

 

[jay745]

Well Blackhawk farms was HOT. But I had fun, my damn charge pipe popped off towards the end of the day. I double clamped it and hopefully it holds for the next one. I noticed my damn rotor loose from the top hat again. This is brand new hardware...I've come to the conclusion the standard hardware they supply is just garbage. After I upgrade to the conical washer hardware I do t have any issues. Ordered that and will swap it out this weekend.

 

[Roadrunner_GTI]

Well Blackhawk farms was HOT. But I had fun, my damn charge pipe popped off towards the end of the day. I double clamped it and hopefully it holds for the next one. I noticed my damn rotor loose from the top hat again. This is brand new hardware...I've come to the conclusion the standard hardware they supply is just garbage. After I upgrade to the conical washer hardware I do t have any issues. Ordered that and will swap it out this weekend.

Which conical washer are you upgrading to? Just installed new rotors on a set of spare hats and the washers that came with the rotors are conical and lock as you torque them.

 

[jay745]

Which conical washer are you upgrading to? Just installed new rotors on a set of spare hats and the washers that came with the rotors are conical and lock as you torque them. View attachment 216783

Those are the ones. The hardware that came with mine came with flat washers which are supposedly the race version.

 

[Roadrunner_GTI]

Those are the ones. The hardware that came with mine came with flat washers which are supposedly the race version.

Ok, good to know. I really didn’t feel like breaking these apart again

 

[jay745]

Ok, good to know. I really didn’t feel like breaking these apart again

I'm disappointed in stoptech. They should supply the conical hardware with all of their kits. The rotor should not come loose after 1 track day or ever for that matter.