Sport Auto 18 vs 19 inch test.
#1
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Sport Auto in Germany tested a 997 3.6 with 18 inch and 19 inch wheels back to back and the car with 19 inch was slower by 2 seconds 0 to 200 KPH.
(125 MPH).
(125 MPH).
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The 18 and 19's have the same rolling diameter due to the increased sidewall height of the 18's vs 19's
is 0 to 200 KPH meaningfull at all...Does anybody really care......what are the slalom speeds?
Fact:
The 997 that competes in the Grand Am GS class runs on 17" wheels, per the rule book.
is 0 to 200 KPH meaningfull at all...Does anybody really care......what are the slalom speeds?
Fact:
The 997 that competes in the Grand Am GS class runs on 17" wheels, per the rule book.
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Originally Posted by David A
It 's because 19 inch have a bigger circumference ratio(bigger circle) than 18 inch.
FWIW, Porsche themselves tested the Boxster very early on with 16's, 17's and 18's. The car was significantly faster around Weissach on 16's than on either 17's or 18's.
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Any idea what the weight difference is? I see many people, report many numbers, but how much is the total difference in weight.
Porsche themselves report the difference in drag for the wheels: 0.01 (0.28 vs 0.29).
Porsche themselves report the difference in drag for the wheels: 0.01 (0.28 vs 0.29).
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Originally Posted by PV
Porsche themselves report the difference in drag for the wheels: 0.01 (0.28 vs 0.29).
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Yep, very important for: top speed (if drag limited), fuel economy, and more.
Of course the road resistance (total different thing) will also change.
What about the weight?
Of course the road resistance (total different thing) will also change.
What about the weight?
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Originally Posted by Viken
FWIW, Porsche themselves tested the Boxster very early on with 16's, 17's and 18's. The car was significantly faster around Weissach on 16's than on either 17's or 18's.
I read somewhere that the 19s were slapped on the S just for looks and to differentiate it from the non-S.
So I have a slower car, with a harsher ride, just so it LOOKS cool and this is totally fine with Porsche even though they try to sell the car with all that "no-compromise-in-performance" baloney in the brochures?
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Originally Posted by MMD
If that's true I'm getting pissed. It's like posers are designing this car for Porsche. All show and no action. I read somewhere that the 19s were slapped on the S just for looks and to differentiate it from the non-S. So I have a slower car, with a harsher ride, just so it LOOKS cool and this is totally fine with Porsche even though they try to sell the car with all that "no-compromise-in-performance" baloney in the brochures? ![banghead](https://rennlist.com/forums/graemlins/banghead.gif)
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#15
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Originally Posted by MMD
If that's true I'm getting pissed. It's like posers are designing this car for Porsche. All show and no action.
I read somewhere that the 19s were slapped on the S just for looks and to differentiate it from the non-S.
So I have a slower car, with a harsher ride, just so it LOOKS cool and this is totally fine with Porsche even though they try to sell the car with all that "no-compromise-in-performance" baloney in the brochures?![banghead](https://rennlist.com/forums/graemlins/banghead.gif)
I read somewhere that the 19s were slapped on the S just for looks and to differentiate it from the non-S.
So I have a slower car, with a harsher ride, just so it LOOKS cool and this is totally fine with Porsche even though they try to sell the car with all that "no-compromise-in-performance" baloney in the brochures?
![banghead](https://rennlist.com/forums/graemlins/banghead.gif)
![evilgrin](https://rennlist.com/forums/graemlins/evilgrin.gif)