Surprised at wheel/tire weight
03-16-2010, 08:59 PM
#16
Rennlist Member
Put my track wheels/tires on the car yesterday to put them through an initial gentle heat cycle then took them off again to let them rest. While switching them back and forth with the street wheel/tire combo I decided to weigh them.
Stock Carrera Sport w/Pirelli P Zero's
F 19x8.5 235/35/19 46lbs
R 19x11.5 305x30x19 61lbs
Track Carrera IV (standard 2009 Carrera wheel) w/Michelin Sport Cups
F 18x8 235/40/18 44lbs
R 18x10.5 295/30/18 49lbs
I expected the track combo to be lighter than stock due to the smaller and slightly narrower wheels, the half tread depth on the MPSC's, and the rear tires are one size smaller, but still I was really suprised at the 12 pound diffference per tire at the rear. That's a lot of unsprung weight!
Stock Carrera Sport w/Pirelli P Zero's
F 19x8.5 235/35/19 46lbs
R 19x11.5 305x30x19 61lbs
Track Carrera IV (standard 2009 Carrera wheel) w/Michelin Sport Cups
F 18x8 235/40/18 44lbs
R 18x10.5 295/30/18 49lbs
I expected the track combo to be lighter than stock due to the smaller and slightly narrower wheels, the half tread depth on the MPSC's, and the rear tires are one size smaller, but still I was really suprised at the 12 pound diffference per tire at the rear. That's a lot of unsprung weight!
I've lifted them up a few times and didn't feel that heavy... I must be quite strong then!
03-16-2010, 09:16 PM
#17
Poseur
Rennlist Member
Rennlist Member
The opinions have nothing to do with track performance, rather marketing desire. In no way did I find my 997 GT3 with steel brakes any lesser than those made with PCCB. If I were to order another Porsche, which based on my history of 3 new cars in 3 years, I again will not order PCCB.
For those of us who are impoverished, buying the PCCBs is economically sensible in that (1) they're lighter as a whole, (2) there is virtually no brake maintenance costs for nearly 200,000 miles, and (3) I save my back with no need to clean wheels!
03-17-2010, 01:43 AM
#18
Race Director
Yep I understand your thoughts going this way...but on the other hand on the street you will not see/feel any difference between steels and PCCB's...oh yeah I forgot...less dust...$8K+ for less dust?....hummm I'll just wash the dang wheels...then at some point you are going to have to come up with $15k+ for new rotors if you keep the car long enough YMMV.....for the street or track... PCCB...NO THANKS.
03-17-2010, 02:11 AM
#19
Poseur
Rennlist Member
Rennlist Member
Start pricing those iron rotors. How many would you put on a Carrera in 200,000 miles? Perhaps 4-5 sets? Plus labor, and system disturbance.
They are a bigger plus in areas with corrosion issues--vastly better than iron in that situation. They are growing in popularity over in Europe once you sit down and do the math.
They are a bigger plus in areas with corrosion issues--vastly better than iron in that situation. They are growing in popularity over in Europe once you sit down and do the math.
03-17-2010, 09:56 AM
#20
Moderator
Rennlist Member
Rennlist Member
I suppose there's a set of rotors for every need. For the very few that plan to keep their 997 for 200k miles, sounds like PCCB can be nice in that you would never have to change rotors, just pads. A new set of iron rotors on a C2S runs $600 from Suncoast. Labor on a set of rotors is $200 all-in. $8k would buy you about 10 sets and at 50k miles each that's 500,000 miles.
I guess it really comes down to what you want...
I guess it really comes down to what you want...
