F430 Extreme tire wear inside right, why? - Ferrari Life
 
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post #1 of 10 Old 05-27-2014, 10:47 PM Thread Starter
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Extreme tire wear inside right, why?

Just got back from Rudskogen racetrack in Norway and found out that I have massive tire wear on both front tires on the inner side. It is more visible on the right side even though the track is driven clock vise.

At first I thought that it was camber related but after asking around it is pretty clear that the angle isn't camber. Most of my friend seem to think it is toe-related. Anyone that can explain how toe can cause this type of wear pattern?

The car is a 430 Scuderia with -3,5 degr camber and 0 toe at the front. Tires are Pirelli Trofeo R 245/35-19 at the front on original tires.

I am getting different answers about what to do, some say more toe-in, other say more toe-out. Has anyone on the forum had similar problem and solved it?

Her is a short movie from the track. As you can see it is fairly demanding and technical...

https://www.youtube.com/watch?v=LbL3yWFOvVM
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Ferrari 430 Scuderia 2008/12
(Ferrari 355 GTS F1 -99)
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post #2 of 10 Old 05-28-2014, 01:30 AM
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Are you 100% certain the toe is 0 at the front?
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post #3 of 10 Old 05-28-2014, 01:39 AM Thread Starter
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Nope ;-) I need to check that again.

The question is which way to go to minimize this behavior, toe-in or toe-out? Is it an excessive toe-in that causes it or an excessive toe-out?

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post #4 of 10 Old 05-28-2014, 09:17 AM
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Johan- I think it is the camber that is doing it. I wore out a set of fronts very quickly from too much negative camber just driving on the street. Excessive toe in or toe out will wear the fronts, too, because in both cases, you are dragging the tires sideways. Add in a lot of camber, and you will drag the part that is touching the pavement in a straight line. The high camber only helps under heavy cornering loads, otherwise the tire is running on just the inside of the tread, wearing it quickly. Always a compromise between wear and cornering.

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post #5 of 10 Old 05-28-2014, 09:27 AM
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Hi Johan, I agree with Terry, if your both front tires have the same inside wear as shown on your picture, it is caused by excessive camber or excessive toe OUT or the combination of both. I don't think that you have overloaded the front axle which would cause also such kind of wear.
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post #6 of 10 Old 05-28-2014, 10:35 AM
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I would guess you have a toe problem but the only way to check is to get the geo measured. Zero toe is great for turn in but if you manage to get toe out then you can get a lot of wear quickly.
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post #7 of 10 Old 05-28-2014, 11:22 AM
 
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When I was in school i worked for a major tire store here in the states. That defiantly looks like a toe issue. I would put the car on a laser alignment rack or have someone that is very experienced with setting up cars. You might also have them take a look at the tie-rods to make sure things are not moving around on you after the work is done.
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post #8 of 10 Old 05-28-2014, 12:56 PM Thread Starter
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I will string up the car tomorrow and double check all chassi data. If everything is as I set it before I will start by adding a little toe-in and see if that helps If it doesnt, I will back of the camber a bit. Next track session is on Friday so I should know after that if it helped or not.

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(Ferrari 355 GTS F1 -99)
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post #9 of 10 Old 05-29-2014, 03:41 PM
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look fwd to the new results and solution[s]

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post #10 of 10 Old 05-31-2014, 01:30 AM Thread Starter
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I ended up setting 1 mm toe-out. 35 laps on a Kinnekulle didn't result the earlier result. I have been on this track many times before and I have never had this problem so I am not sure this test proves anything though... We will know for sure after next visit to Rudskogen I guess...

A couple of laps at Kinnekulle, great weather and perfect conditions :-)

https://www.youtube.com/watch?v=plvR-VPz6jc

Ferrari 430 Scuderia 2008/12
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