Tyre wear, camber on a chim.
Discussion
I am getting about 4-5 track and airfield days to a set of R888's.
Most of the wear occurs on airfield days.
I don't think it is the tarmac used on airfields, just you can go quicker with the belief that if you get it wrong you should remain unscathed.
I am running an extra 1 degree of neg camber at the front and 1/2 a degree at the rear..
The rear wears fairly evenly but the fronts always ends up bald on the outer half of the tyres.
Should I live with this?
Increase camber on the front?
And,
Is there a better wearing tyre that is still grippy?
Here's one I prepared earlier!
HCM.
Most of the wear occurs on airfield days.
I don't think it is the tarmac used on airfields, just you can go quicker with the belief that if you get it wrong you should remain unscathed.
I am running an extra 1 degree of neg camber at the front and 1/2 a degree at the rear..
The rear wears fairly evenly but the fronts always ends up bald on the outer half of the tyres.
Should I live with this?
Increase camber on the front?
And,
Is there a better wearing tyre that is still grippy?
Here's one I prepared earlier!
HCM.
I noticed my top original swivels had more adjustment in them and could take extra neg.
I renewed them recently and found that my 1 degree additional neg is all they will adjust to!
TvrMonster do a modified top wishbone but these are £229.00 each!
Is there any other way of obtaining a bit more neg?
HCM.
I renewed them recently and found that my 1 degree additional neg is all they will adjust to!
TvrMonster do a modified top wishbone but these are £229.00 each!
Is there any other way of obtaining a bit more neg?
HCM.
Are you running a standard suspension set up, my brother has a Chimera and has suffered the same problem regardless of camber set up. The car always suffered from understeer and didn`t have the power at the rear wheels (4.0) to change it to controllable oversteer to get the car to turn in.
Looking at the condition of your tyres, the wear is virtually half way across the tyre and is synonomous with this, although looking on your profile pic, there is a pic of hard cornering that also demonstrates that the wheel could do with more negative camber, although I`m not certain that this would remedy your problem entirely?
I`m sure that you are aware that airfield track days are particularly abrasive and are generally high speed long sweeping bends which will eat front tyres under hard cornering. Maybe a trip to a good Geo Technician would be beneficial to optimise your current set up?
Apologies in advance if you have already gone down this route, but thought it may be worth mentioning as a similar problem has been experienced 1st hand.
Looking at the condition of your tyres, the wear is virtually half way across the tyre and is synonomous with this, although looking on your profile pic, there is a pic of hard cornering that also demonstrates that the wheel could do with more negative camber, although I`m not certain that this would remedy your problem entirely?
I`m sure that you are aware that airfield track days are particularly abrasive and are generally high speed long sweeping bends which will eat front tyres under hard cornering. Maybe a trip to a good Geo Technician would be beneficial to optimise your current set up?
Apologies in advance if you have already gone down this route, but thought it may be worth mentioning as a similar problem has been experienced 1st hand.
Big Ashy said:
Are you running a standard suspension set up, my brother has a Chimera and has suffered the same problem regardless of camber set up. The car always suffered from understeer and didn`t have the power at the rear wheels (4.0) to change it to controllable oversteer to get the car to turn in.
Looking at the condition of your tyres, the wear is virtually half way across the tyre and is synonomous with this, although looking on your profile pic, there is a pic of hard cornering that also demonstrates that the wheel could do with more negative camber, although I`m not certain that this would remedy your problem entirely?
I`m sure that you are aware that airfield track days are particularly abrasive and are generally high speed long sweeping bends which will eat front tyres under hard cornering. Maybe a trip to a good Geo Technician would be beneficial to optimise your current set up?
Apologies in advance if you have already gone down this route, but thought it may be worth mentioning as a similar problem has been experienced 1st hand.
Hi.Looking at the condition of your tyres, the wear is virtually half way across the tyre and is synonomous with this, although looking on your profile pic, there is a pic of hard cornering that also demonstrates that the wheel could do with more negative camber, although I`m not certain that this would remedy your problem entirely?
I`m sure that you are aware that airfield track days are particularly abrasive and are generally high speed long sweeping bends which will eat front tyres under hard cornering. Maybe a trip to a good Geo Technician would be beneficial to optimise your current set up?
Apologies in advance if you have already gone down this route, but thought it may be worth mentioning as a similar problem has been experienced 1st hand.
I have had geo setup recently.
Front, +1 degree neg additional camber.
Rear, +1/2 degree neg " " .
I agree with you about long sweeping bends on airfields, at Colerne airfield yesterday, I stole a look at the speedo on one fast lefthander at the end of the day when it was dry and confidance high, 115mph!
Maybe I am expecting too much?
Rears are also worn and due for replacement but not as bad as the fronts.
Turn in isnt bad, in fact I have received a lot of positive remarks on the way the car handles, mostly from elise/exige owners I have tried to stay in front of;)
I belive they think it shouldn't handle at all!
HCM.
Hi Mike,
For example I run
-4F
-1.5R
Looks like you need similar. you can get -2F on std wishbones if you gring the balljoints a touch!
and yes, airfields will Fnck yer tyres. Tarmac is designed for stopping planes and is usually stuffed 1960s stuff at best. Mr P has just resurfaced 1/2 of BHI for instance with the latest trackmac.
Pays yer money! Takes yer choice. I don't do many AF days now.
For example I run
-4F
-1.5R
Looks like you need similar. you can get -2F on std wishbones if you gring the balljoints a touch!
and yes, airfields will Fnck yer tyres. Tarmac is designed for stopping planes and is usually stuffed 1960s stuff at best. Mr P has just resurfaced 1/2 of BHI for instance with the latest trackmac.
Pays yer money! Takes yer choice. I don't do many AF days now.
Sometimes as well as geo its down to spring rates, I ate through front tyres tracking an e36 m3 on stock springs, then ran coilovers with double the spring rates & not silly agressive geo as it was used on road (but proper cornerweight set up) = complete diference in tyres wear not to mention a lot quicker.
chris7676 said:
You probably need more than a degree. I don't think it will make a noticeable negative wear on the inside of the tyres during road driving, that would normally be caused by excessive toe out in the 1st place.
lots of -ve camber will wear the insides of the tyres very quickly on the road. Toe out will also do this.Guillotine said:
Hi Mike,
Tarmac is designed for stopping planes and is usually stuffed 1960s stuff at best. Mr P has just resurfaced 1/2 of BHI for instance with the latest trackmac.
The latest tarmac at brands was laid to reduce tyre noise I believe. I'm told it's the same stuff that is laid at Bedford. Tarmac is designed for stopping planes and is usually stuffed 1960s stuff at best. Mr P has just resurfaced 1/2 of BHI for instance with the latest trackmac.
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