21” vs. 20” Ackerman Effect

Wheels, Tyres, Suspension, Chassis, Issues and Fixes
Scoobyd
Posts: 35
Joined: Sun Aug 06, 2023 12:22 pm

Post by Scoobyd »

20" wheels on my GTS and get the Ackerman at times when on full lock. So wouldn't say it's going to make a great deal of difference.
Porsche Macan GTS Gen 1
2003 E46 BMW 330ci Sport Convertible

MCDK
Posts: 2502
Joined: Wed Jan 20, 2016 8:54 pm

Post by MCDK »

Had a 911 demo today and an amazing amount of Ackerman effect on that. So much so that my wife who was a passenger asked what was wrong with the car. zero Ackerman effect on my Taycan but imagine the rear wheel steering helps.
Jon A
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Joined: Tue Oct 19, 2021 7:26 pm

Post by Jon A »

MCDK wrote: Thu Mar 14, 2024 3:47 pm Had a 911 demo today and an amazing amount of Ackerman effect on that. So much so that my wife who was a passenger asked what was wrong with the car. zero Ackerman effect on my Taycan but imagine the rear wheel steering helps.
I get it on the 911 all the time. I can predict the outside temperature by it - 10 degrees or lower it happens, over 10 degrees, nothing… 🤷‍♂️
718 Boxster - lava orange (2019)
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MikeM
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Joined: Tue Nov 17, 2015 11:13 pm

Post by MikeM »

Pythongrün wrote: Thu Mar 14, 2024 2:30 pm
Bluesnose1812 wrote: Thu Mar 14, 2024 12:40 pm I don't believe that the effect is an issue at all. The car doesn't get damaged in any way

It is just the combination of various physical geometry factors will mean that wheels will scrub more when on full lock and even more so when the weather is cold and sidewalls less forgiving . Having lower profile tyres just means there is less sidewall flex and so it is more noticeable.
It’s more the excess scrubbed edges on the tyres I’m keen to avoid rather than the noise. It’s full lock in and out of its parking spot at home
Looks like you have P Zero Corsa tyres too. Not so much tread in the first instance and generally not recommended in extreme cold temperatures. You could consider a smaller diameter winter set
Previous Porsche’s
2008. 987 Boxster S Sport basalt
2012. 991 Carrera S aqua
2016. Macan Turbo volcano
Current
2020. Macan GTS crayon
2024. Macan GTS gentian. Delivery update mid May https://configurator.porsche.com/porsche-code/PR8H7WC6
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