17" Wheels on 996 Turbo?
03-12-2012 | 04:50 PM
#16
Rennlist Member
Joined: Nov 2010
Posts: 2,740
Likes: 16
From: SE Florida
Wanna911, the 17 will dictate an overall difference in circumference and sidewall height and contact patch size, therefore my post stands! So before you go and blast a post, think through it!
In regards to your other comment, when shopping for replacement tires you should stay witihin the tolerence of the factory spec N tires as it relates to circumference. So if you follow this it all doesn't go out the window!
If you did your homework, you would not say the 18 and 20 were put on for looks!
From Euopean Motorcar
"I consulted Michelin and Porsche engineers along with some seasoned Porsche racers about this. Porsche's engineers did not find our problem surprising and said, "All the fuel and chassis control systems on the 996 Turbo are built and tested around the wheel and tire size and their corresponding rolling radius. Altering the standard size not only has adverse effects on the performance and handling but most likely could end in damaged drivetrain parts such as a broken front differential or viscous clutch damage (not a warranty matter). The weight of the wheels and tires is not a major factor." This just goes to show how dialed in Porsche's cars are out of the box. "
Read more: http://www.europeancarweb.com/tech/0...#ixzz1ow0Xh9l4
In regards to your other comment, when shopping for replacement tires you should stay witihin the tolerence of the factory spec N tires as it relates to circumference. So if you follow this it all doesn't go out the window!
If you did your homework, you would not say the 18 and 20 were put on for looks!
From Euopean Motorcar
"I consulted Michelin and Porsche engineers along with some seasoned Porsche racers about this. Porsche's engineers did not find our problem surprising and said, "All the fuel and chassis control systems on the 996 Turbo are built and tested around the wheel and tire size and their corresponding rolling radius. Altering the standard size not only has adverse effects on the performance and handling but most likely could end in damaged drivetrain parts such as a broken front differential or viscous clutch damage (not a warranty matter). The weight of the wheels and tires is not a major factor." This just goes to show how dialed in Porsche's cars are out of the box. "
Read more: http://www.europeancarweb.com/tech/0...#ixzz1ow0Xh9l4
03-12-2012 | 07:04 PM
#17
Rennlist Member
Joined: Apr 2004
Posts: 117
Likes: 0
From: Grand Lake, CO
From Euopean Motorcar
"I consulted Michelin and Porsche engineers along with some seasoned Porsche racers about this. Porsche's engineers did not find our problem surprising and said, "All the fuel and chassis control systems on the 996 Turbo are built and tested around the wheel and tire size and their corresponding rolling radius. Altering the standard size not only has adverse effects on the performance and handling but most likely could end in damaged drivetrain parts such as a broken front differential or viscous clutch damage (not a warranty matter). The weight of the wheels and tires is not a major factor." This just goes to show how dialed in Porsche's cars are out of the box. "
Read more: http://www.europeancarweb.com/tech/0...#ixzz1ow0Xh9l4
"I consulted Michelin and Porsche engineers along with some seasoned Porsche racers about this. Porsche's engineers did not find our problem surprising and said, "All the fuel and chassis control systems on the 996 Turbo are built and tested around the wheel and tire size and their corresponding rolling radius. Altering the standard size not only has adverse effects on the performance and handling but most likely could end in damaged drivetrain parts such as a broken front differential or viscous clutch damage (not a warranty matter). The weight of the wheels and tires is not a major factor." This just goes to show how dialed in Porsche's cars are out of the box. "
Read more: http://www.europeancarweb.com/tech/0...#ixzz1ow0Xh9l4
Their comment that they achieved the highest lateral g with the 19s in severe oversteer is interesting. Then the comment that results were not significantly different with PSM on versus off is bizarre. The TT's PSM is not that liberal in its operating range, is it?
Cheers
