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Consolidated Macan Brembo upgrade thread (READ FIRST POST)

bobivy1234

Go Kart Champion
Location
Greensboro, NC USA
Car(s)
2016 VW Golf GTI
And definitely open to suggestions on rotors - dust/heat shield def can get modified up :)
Was at Fastivus also and unfortunately the Jefferson track is so short and the parking lot is small that it is tough to really let those brakes cool down but I circled the lot a few times after each session. Did you do anything like that to cool them down first or just park immediately after the session? Hot air trapped statically in the calipers/rotors especially in the Macans is bad news generally.

I'm running the ECS 2-piece 345mm slotted rotors that have been solid with the Macans, I think the directional veining and 2-piece really does make a difference in cooling compared to blanks but maybe I'm in the minority. Install the RS3 plastic deflectors as those help a lot with getting forced air to the rotors. I've cut all my heat shields to the absolute minimum with tin snips to only protect the ABS components and the ball joints at each corner.
 

scrllock

Autocross Champion
Location
MI
And definitely open to suggestions on rotors - dust/heat shield def can get modified up :)
definitely recommend girodisc or PFC if you can swing them. racingbrake, ecs, 034, and neuspeed also sell 2-piece rotors of more questionable origin.
I don't know if it fits the smaller rotor/caliper setups but the Mk3 TTRS/RS3 heat shields bolt on and add a lot of venting.

but man, that's gotta be a warranty claim, you shouldn't see a huge crack down to the hat on a single track day.
 

TheMuffinMan

Go Kart Newbie
Location
Virginia
Was at Fastivus also and unfortunately the Jefferson track is so short and the parking lot is small that it is tough to really let those brakes cool down but I circled the lot a few times after each session. Did you do anything like that to cool them down first or just park immediately after the session? Hot air trapped statically in the calipers/rotors especially in the Macans is bad news generally.

I'm running the ECS 2-piece 345mm slotted rotors that have been solid with the Macans, I think the directional veining and 2-piece really does make a difference in cooling compared to blanks but maybe I'm in the minority. Install the RS3 plastic deflectors as those help a lot with getting forced air to the rotors. I've cut all my heat shields to the absolute minimum with tin snips to only protect the ABS components and the ball joints at each corner.
Minimal cool down to be honest, I did take the "long" way around back to my parking spot to let them cool some but clearly not enough...

RS3 ducts are in place already, sounds like trimming/removing the heat shield should.
 

Charlotte.:R

Autocross Champion
Location
Charlotte
Car(s)
'18 Golf R 6MT
Completely losing brakes at 148mph.

Yikes!!!

You’ve been running these for awhile, interesting a problem would pop up now. Was there anything specific that made you determine it was the OBD11 mods, or just the most likely culprit?

I did the OBD11 mods too, so kind of rethinking them. I don’t track my car, so it never sees that kind of speed.
 

GTIfan99

Autocross Champion
Location
FL
Yikes!!!

You’ve been running these for awhile, interesting a problem would pop up now. Was there anything specific that made you determine it was the OBD11 mods, or just the most likely culprit?

I did the OBD11 mods too, so kind of rethinking them. I don’t track my car, so it never sees that kind of speed.
Other people tracking with various brake kits has same issue after doing the OBD11 mods.

RRG is the right way to get the correct feel, not making changes to brake balance that we don't fully understand.

Still no issue with these settings on the street.

When I went back to stock OBD11 settings, the car rotated better under braking, too.
 

TheMuffinMan

Go Kart Newbie
Location
Virginia
Other people tracking with various brake kits has same issue after doing the OBD11 mods.

RRG is the right way to get the correct feel, not making changes to brake balance that we don't fully understand.

Still no issue with these settings on the street.

When I went back to stock OBD11 settings, the car rotated better under braking, too.

Interesting, so you also dialed back all the tweaks? May be worth updating the original post to highlight that
 

LVE2DRV

Passed Driver's Ed
Location
NYC
Other people tracking with various brake kits has same issue after doing the OBD11 mods.

RRG is the right way to get the correct feel, not making changes to brake balance that we don't fully understand.

Still no issue with these settings on the street.

When I went back to stock OBD11 settings, the car rotated better under braking, too.
whats the proper way to apply RRG, take piston out or no need?
 

GTIfan99

Autocross Champion
Location
FL
whats the proper way to apply RRG, take piston out or no need?
Proper way, remove them.

The lazy GTIfan way, extend pistons, apply to as much of the pistons as you can, push them back in and call it a day.

Whatever you do, don't use a 2 x 4, or @jay745 will come at you like a spider monkey. 🤣

But seriously, I'm a hack mechanic, take wrenching advice from me at your own risk, though not much risk here. You either get enough of the piston coated or not. You'll know if you did. You'll halve the piston retraction.
 

jay745

What Would Glenn Danzig Do
Location
Slightly Outside Chicago
Car(s)
Mk6 racecar, Tacoma
I like hydraulic assembly lube over rrg. If you're going through all this hassle I'd just recommend rebuilding them with new seals as well which does require the pistons to come out.
20221028_100349.jpg
 

GTIfan99

Autocross Champion
Location
FL
Jay is correct that it's best to remove them and lube, but I'd still use rrg, we have quantifiable data on the thread that it greatly reduces the piston retraction.
 

jay745

What Would Glenn Danzig Do
Location
Slightly Outside Chicago
Car(s)
Mk6 racecar, Tacoma
Jay is correct that it's best to remove them and lube, but I'd still use rrg, we have quantifiable data on the thread that it greatly reduces the piston retraction.
Take it you've never had to clean the inside of a caliper that had rrg that dried up and caked all over the inside before...
 

GTIfan99

Autocross Champion
Location
FL
Take it you've never had to clean the inside of a caliper that had rrg that dried up and caked all over the inside before...
That's not the point though. Many motorsports teams use it to reduce piston retraction, it holds up well, and a member here tested and it reduced retraction by 50% on these calipers.

Unless you can tell me the other grease does the same, being easy to clean up is pretty irrelevant.
 
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