Angryinch

Maybe they mixed up oil change and engine rebuild.. lmao funny stuff

I would be more concerned about those rotors! Take one off and weigh it… $$$$

Manifold

Rotor wear is judged by carbon content, not weight. And you have to measure the carbon content with the rotors off the car; measuring with the rotors on the car will greatly overestimate the wear, especially for the rear rotors.

Angryinch

https://porsche.snapon.com/special-tools-detail.aspx?itemid=45090042


Never make assumptions! I assumed they would weigh them, which is useful, but you’re right they do have a scanner for the carbon! Crazy.

The dealerships should all have this. Have them scan the brakes for wear.

Manifold

You can measure the weight, but hard to measure it accurately enough. Standard procedure is measure the carbon content using the Carboteq tool. Manufacturer of the tool says you can measure with the rotors on the car, but Porsche guidance correctly states that the rotors need to come off the car. I've measured with the rotors on and off the car, and it makes a big difference.

ExMB

Either you rode left foot on brake and right foot on gas, together at the same time, or some shop saw you coming a mile away.

Please list the shop and location so people can avoid it.

Jevi Javi

ah so its properly broken in for you already

Orca911

I might ask for alignment specs. Just so you know depending on your intended use.
cars don't know the difference of where they have been driven
brakes and tires easy to see wear level.

7382929296

Seems like a tracked car isn’t good anymore, thank goodness I take my RS to cars and coffee only along with the occasional shopping day here and there

MOGI

Sesha, I just got back from the Porsche track experience at Birmingham. I had long conversations with multiple instructors over the first night’s dinner, including Cass Whitehead, who is the lead instructor and they mentioned that all of their 911s were fitted with PCCBs and they last approx 18,000 track miles with the pads needing change ~5-6000 track miles.

In fact, they made the decision to have all the cars with PCCBs because it was calculated to be cheaper in the long run than swapping out iron discs and pads. This came straight out of the horse’s mouth.

It made me appreciate how long the PCCBs were good for… and we’re talking wear and tear from ham fisted, lead footed drivers who go through their programs.

f4bones

I was fortunate to purchase the PCCB scanner tool from a forum member - pretty slick tool, and you can measure the wear without pulling off the rotors . . even do it without removing the wheel if you have small fingers. .

SESHA

Few things...I was not aware of the scanner tool. The guy went by weight...it was uneven...first pad change was maybe 35 to 40 percent and second set was a change. This was on a 991.2 GT3 with the primary track having two long straight (150s at brake zone). If PCCB can last 18000 track miles which would be like 9 years for me I would say its a great deal and everyone should leave those on.

SESHA

Until I saw this thread I simply assumed what I got was not out of line!...I am still not sure what can explain such a big variance. Perhaps there is some sort of exponential degradation with temp perhaps. Does anyone here have direct experience running PCCB on a GT car?


I also found this...very usefull information since irs the same car as mine...he runs through his pads in about the same time as me 6-9 track days but is getting 3 to 6 changes vs my 2.

https://www.taycanforum.com/forum/threads/actual-data-2018-911-gt3-pccb-wear-data-facts-for-informational-purposes.12690/

Manifold

The pads may only last a few or several track days if replaced at half thickness, but the rotors should definitely last dozens of track days. Your shop didn’t know what they were doing and wasted your money by replacing the rotors prematurely.

Angryinch

I bet a lot of dealers are too cheap to buy that scanner and simply weigh the rotors, changing them when not even necessary.

I’ll have to look up what the PCSS shop notes say regarding rotor charge procedure.

ipse dixit

You have to take the wheels off when using the Carboteq tool.

That's the only way to do it properly.