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Cam Arnott

What did you do to your GT3 today?

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1 hour ago, spiller said:

This is Kussmaul vs factory. Front grip on initial turn in with factory car is not too bad but it’s what happens when you apply the throttle that I find the most troubling. Front end lifts up and the steering goes numb with a lot of understeer. Probably too much squat in the rear but stiffening the sway bar should help with that (and then also stiffening front to maintain neutral front to rear balance). @Stephen Tinker I was thinking around -2.3 front and rear, neutral front toe and +2mm rear toe in per side. From my understanding Kussmaul is more of a track orientated set up but I used to run heaps more camber for the track, especially in the front. 

 

I've ALWAYS used less camber on the rear than on the front - even if its only 0.25 - 0.5 deg. less as it helps with initial turn in ....

And I think you are on the right track regards the F / R toe.

The reason I used slightly less camber than Roland's advise was purely for tyre wear. But after about 8,000km on nearly new PS2' 's , the rear's were still good of another 8,000 km and the fronts were "almost" as new...

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42 minutes ago, 901er said:

Bloody hell mate, just take the cup car on the Sunday coffee run if your that short on time 😆

If only it had cup holders 🤭

29 minutes ago, Stephen Tinker said:

I've ALWAYS used less camber on the rear than on the front - even if its only 0.25 - 0.5 deg. less as it helps with initial turn in ....

And I think you are on the right track regards the F / R toe.

The reason I used slightly less camber than Roland's advise was purely for tyre wear. But after about 8,000km on nearly new PS2' 's , the rear's were still good of another 8,000 km and the fronts were "almost" as new...

I agree with a bit more in front than rear too. My main concern for the front was also tyre wear (and tram lining, which shouldn’t be as bad with 0 front toe) but if you found the tyres held up ok perhaps I’ll try bumping up the front a bit. Did you run the exact Kussmaul set up Stephen or less 0.5 camber in the front/rear? Reason I ask is 0.5 less in the rear is -1.8 which is factory. I’m not overly fussed with tyre wear, with the kms I’m doing it will be years before they need replacement, by which time they’ll be hard as rocks anyway. 
 

Apologies if this has turned into a set up thread!  I will start a separate one.

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If you are not worried about tyre wear, I would go along with Kussmaul's set up every time - to the letter. Honestly, you won't regret it.

Of course, the only other conundrum is who is going to set up the car to Roland's specs? Sounds easy, but getting the (especially the front) toe in equal on both sides takes quite a bit of backwards and forwards in time and effort.

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49 minutes ago, Stephen Tinker said:

If you are not worried about tyre wear, I would go along with Kussmaul's set up every time - to the letter. Honestly, you won't regret it.

Of course, the only other conundrum is who is going to set up the car to Roland's specs? Sounds easy, but getting the (especially the front) toe in equal on both sides takes quite a bit of backwards and forwards in time and effort.

Personally, I wouldn’t trust anyone other than a Porsche specialist (not Porsche Centre) to do something like this. It’s pretty fiddly especially when you start rotating front struts in order to get the castor where you want it to be. 

2 hours ago, TwoHeadsTas said:

As stiff as the cup car is, I don’t think the coffee would stay in the cup for too long on an Adelaide Hills backroad 😜

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