Wheels and Tires Discussion about wheels and tires for the S2000.
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Amuse Wheel/Suspension Setup

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Old Sep 17, 2004 | 09:48 AM
  #11  
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Originally Posted by Fongu,Sep 17 2004, 05:02 AM
I believe they use +63 all around. With that offset rims are barely covered by the fender. There is probably a rolled/modified fender. I guess there is no suspension clearance issues.



Bigger tires up front should provide more front tire grip, so more braking potential (if the brake bias is adjusted properly) and more turn in/rotation potential (but would lead to way more oversteer than stock, unless adjusted by suspension). Essentially more potential grip if balanced out properly.



Suspension is a complicated thing. There are so many more things that can be tweaked that Amuse could have done which are unknown. There are static factors that affect the overall oversteer characteristics (tire stagger, spring rate, antirollbar spring rate, tire spring rate, tire pressures, tire compounds, tire sidewall stiffness). There are dynamic factors based on suspension travel (alignment (camber, toe), shock valving (compression, fast rebound, slow rebound). There are speed related factors (mechanical grip vs. aero downforce, ratio of aero downforce front to back). And I'm sure there are other more subtle stuff too.

In the end to really get what you want, you need to know the application and tune appropriately for it. Do a google search and you'll find masses of tuning guides. There will be no "ultimate handling setting" that works all the time. If you find one it, it'll be a compromise and not the ultimate performance for a certain task. Then again, how many of us can honestly say we use up more than 90% of a car's potential?
Fongu, you always provide great information.

I read a post by Jason Saini a while back where he says he thinks the S can run equal sized tires if it weren't for the poor bump-steer characteristics of the rear suspension geometry.

I wonder if anyone's tried this.
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Old Sep 18, 2004 | 02:26 PM
  #12  
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HyperRev issue 97 indicates that the Amuse car has 17x9 CE28N, +63 f and +40 r.
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