E36 M3 extreme tyre wear
Discussion
Hi Guys,
Can someone let me have the benefit of there expert knowledge PLEASE!!??
Check out the pics below... any ideas on what is causing it?
Inside front.
I think this kind of ware must be coming from the tyre rubbing on the arch? I think its too severe to be setup, especially as she drives perfectly.
If you look carefully you can see some of the tyre rubber on the inside of the arch.
The odd thing is that I have never heard it rubbing.
She is running about -2deg camber.
Kind regards,
Guy
Can someone let me have the benefit of there expert knowledge PLEASE!!??
Check out the pics below... any ideas on what is causing it?
Inside front.
I think this kind of ware must be coming from the tyre rubbing on the arch? I think its too severe to be setup, especially as she drives perfectly.
If you look carefully you can see some of the tyre rubber on the inside of the arch.
The odd thing is that I have never heard it rubbing.
She is running about -2deg camber.
Kind regards,
Guy
I've had one go exact same inner edge on n\s running on clockwise circuit, so is the unused part of the tyre, if yours per the pic was on clockwise track & was o\s then it will take far more pounding.
Had tyre been swapped round on the rim? so current inner was formally the outer?
Old used Slicks do odd things, i killed 2 last wk that had tonnes of tread left, one rear shredded middle tread, down to wire, rubber just peeled away like i'd run it at 150PSI or something, the other did same as yours.
With used race tyres you never know how they have been treated & trackday use does put them through far more heat cycles than they were designed for, so I just accept it- check after each session & take spares.
Not that it was the issue in your case above but 2 deg not really enough camber for Slicks- I run near double that & even more would be better.
Had tyre been swapped round on the rim? so current inner was formally the outer?
Old used Slicks do odd things, i killed 2 last wk that had tonnes of tread left, one rear shredded middle tread, down to wire, rubber just peeled away like i'd run it at 150PSI or something, the other did same as yours.
With used race tyres you never know how they have been treated & trackday use does put them through far more heat cycles than they were designed for, so I just accept it- check after each session & take spares.
Not that it was the issue in your case above but 2 deg not really enough camber for Slicks- I run near double that & even more would be better.
Thanks guys,
The car is running ex-BTCC 17" slicks mounted to E36 328i BBS wheels. The fronts have 20mm spacers to get over the AP's.
There has been some rubber inside the arch, but I have never heard the grumbling noise... which i think is odd.
In relation to the tracking/ steering, there is no NVH at all. It stops completely in a straight line and never pulls.
The tyer was on the front left (but we did swap them left to right during the day). The circuit was Oulton Park.
We are heading back there on Saturday (27th Oct) with a newer set of slicks.
I think I will put some tape on the inside of the arch which should show any rubbing quickly.
If it’s not that then I guess it’s either looking at geo (which i am very reluctant to do as it is handling absolutely spot on at the moment) or possibly putting a bigger spacer on the front to push it out further?
Thanks all for your comments.
Anyone else heading to Oulton Park?
The car is running ex-BTCC 17" slicks mounted to E36 328i BBS wheels. The fronts have 20mm spacers to get over the AP's.
There has been some rubber inside the arch, but I have never heard the grumbling noise... which i think is odd.
In relation to the tracking/ steering, there is no NVH at all. It stops completely in a straight line and never pulls.
The tyer was on the front left (but we did swap them left to right during the day). The circuit was Oulton Park.
We are heading back there on Saturday (27th Oct) with a newer set of slicks.
I think I will put some tape on the inside of the arch which should show any rubbing quickly.
If it’s not that then I guess it’s either looking at geo (which i am very reluctant to do as it is handling absolutely spot on at the moment) or possibly putting a bigger spacer on the front to push it out further?
Thanks all for your comments.
Anyone else heading to Oulton Park?
Try jacking the front wheels off the ground and spinning them by hand while someone turns the steering wheel. I guess put a jack under the front suspension to get the wheel up into the arch properly?
I reckon if that amount of wear came from rubbing somewhere it would leave very obvious signs wherever it is touching. You would almost certainly hear it too.
As said above, excessive toe-out is more likely the culprit (or suspension play that gives excessive toe-out under severe compression on the left hand side?).
I reckon if that amount of wear came from rubbing somewhere it would leave very obvious signs wherever it is touching. You would almost certainly hear it too.
As said above, excessive toe-out is more likely the culprit (or suspension play that gives excessive toe-out under severe compression on the left hand side?).
SOLVED!
WAY too much toe out combined with a very agressive front negative camber (-3.7') was causing the problem.
We ended up killing another set of front slicks in the morning, so we took the car to the FANTASTIC Blink motorsport (just 6 miles away), where they had the Hunter laser alignment machine waiting for our arrival at lunch... 1 hour later the full tracking/ Camber was back where we wanted it and we were back on track, and back to running/handling like a dream.
Video here:
http://www.youtube.com/watch?v=NG4mos-3DW8
Thanks for the suggestions.
WAY too much toe out combined with a very agressive front negative camber (-3.7') was causing the problem.
We ended up killing another set of front slicks in the morning, so we took the car to the FANTASTIC Blink motorsport (just 6 miles away), where they had the Hunter laser alignment machine waiting for our arrival at lunch... 1 hour later the full tracking/ Camber was back where we wanted it and we were back on track, and back to running/handling like a dream.
Video here:
http://www.youtube.com/watch?v=NG4mos-3DW8
Thanks for the suggestions.
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