New tyres & tracking - '04 Monaro CV8
Discussion
Had new tyres fitted recently - goodyear eagle F1 all around. Got 15,000 miles from the originals - not too bad considering I did 2 track days on them.
Noticed that the old front tyres were showing more wear on the inside than the outside. It seems that a lot of Monaros wear their tyres like this?
Also noticed with the new tyres on I'm getting a slight pull to the left, was fine on the old (worn) tyres.
Going to get the tracking checked, my local garage are very good and they have a system that checks all 4 wheels. Can somebody advise of the tracking setting (camber, castor, toe etc...) for an '04 CV8 Monaro?
>> Edited by GSE on Saturday 31st December 11:09
Noticed that the old front tyres were showing more wear on the inside than the outside. It seems that a lot of Monaros wear their tyres like this?
Also noticed with the new tyres on I'm getting a slight pull to the left, was fine on the old (worn) tyres.
Going to get the tracking checked, my local garage are very good and they have a system that checks all 4 wheels. Can somebody advise of the tracking setting (camber, castor, toe etc...) for an '04 CV8 Monaro?
>> Edited by GSE on Saturday 31st December 11:09
I think its been up before.
My Oz Max Ellery guide says:
Caster 7*45' +- 1*15' (HSV same)
Camber -0*12min +- 0* 18min (HSV -0*30min +- 0*20min)
Toe-in Total 0*10min +- 0*10min (HSV Same)
Toe-in per wheel 0*5min +- 0*5min (HSV Same)
Rear is non adjustable, but if its out you can loosen bolts and bounce the car a few times, then retighten.
If you are dealing to the track you might want to consider some more agressive HSV-ish settings, someone else might have an opinion on this.
My Oz Max Ellery guide says:
Caster 7*45' +- 1*15' (HSV same)
Camber -0*12min +- 0* 18min (HSV -0*30min +- 0*20min)
Toe-in Total 0*10min +- 0*10min (HSV Same)
Toe-in per wheel 0*5min +- 0*5min (HSV Same)
Rear is non adjustable, but if its out you can loosen bolts and bounce the car a few times, then retighten.
If you are dealing to the track you might want to consider some more agressive HSV-ish settings, someone else might have an opinion on this.
Hi Paul
A couple of additional things to consider.
The rear IS adjustable for toe in/out on your car.
The wear on the inner edge, is very common. What tyre pressures do you run? I find 36psi rather than the softish factory settings helps this a bit.
Increasing the negative camber (as HSV) or a bit more will improve cornering significantly, (i run mine at 0.5 degrees currently) but wont help wear on the inner edge! Slightly increasing toe in will help counteract this and improve directional stability, but overall tyre wear will be increased.
If tyre life is your only concern, stick with the factory settings, but ever so slightly increase the toe in. I do wonder if with the factory settings being so close to parrallel that when on the move, especially under braking that the tracking goes toe out slightly, adding to the inner tyre wear.
Hope this helps?
A couple of additional things to consider.
The rear IS adjustable for toe in/out on your car.
The wear on the inner edge, is very common. What tyre pressures do you run? I find 36psi rather than the softish factory settings helps this a bit.
Increasing the negative camber (as HSV) or a bit more will improve cornering significantly, (i run mine at 0.5 degrees currently) but wont help wear on the inner edge! Slightly increasing toe in will help counteract this and improve directional stability, but overall tyre wear will be increased.
If tyre life is your only concern, stick with the factory settings, but ever so slightly increase the toe in. I do wonder if with the factory settings being so close to parrallel that when on the move, especially under braking that the tracking goes toe out slightly, adding to the inner tyre wear.
Hope this helps?
Excellent advice guys - thanks! Interesting point about 'optimising' the settings to improve directional stability. I've often thought the steering feels a bit wooly straight ahead, and at speed - although its fine in the corners. I might try that. I'd like to have a go of a VXR at some time to see the difference - beieve the steering rack ratio is different too?
[quote=monkfish1]
The wear on the inner edge, is very common.
quote]
I had my wheels off yesterday to clean them and noticed excessive wear on the drivers front inner edge. Not a mark on the other and I've had the alignment checked (laser) and it is all within limits. The wear is on the inner edge but not right out to the edge as there is a slight step where it is not worn. On the GTO forum, some of the guys there think that there is a problem with the tyres rubbing on something. It looks like this is the problem with me but why on the one side? No handling problems at all so I'm puzzled. Any ideas or help?
Jeff
The wear on the inner edge, is very common.
quote]
I had my wheels off yesterday to clean them and noticed excessive wear on the drivers front inner edge. Not a mark on the other and I've had the alignment checked (laser) and it is all within limits. The wear is on the inner edge but not right out to the edge as there is a slight step where it is not worn. On the GTO forum, some of the guys there think that there is a problem with the tyres rubbing on something. It looks like this is the problem with me but why on the one side? No handling problems at all so I'm puzzled. Any ideas or help?
Jeff
Jeff
Ive certainly seen no rubbing problems on any cars so far. I'm still of the view that the tracking when checked OK statically, changes slighly when on the move. The inner edge will normally only wear because, a) there is toe out (on the move?), b) excessive negative camber (visibly detectable and very unlikely).
There are other potential causes but none that are likely on a mass produced car. The causes of toe out on the move are potentially varied, but as per my previous post a fraction more toe in should be enogh to counteract this.
Hope this helps.
Ive certainly seen no rubbing problems on any cars so far. I'm still of the view that the tracking when checked OK statically, changes slighly when on the move. The inner edge will normally only wear because, a) there is toe out (on the move?), b) excessive negative camber (visibly detectable and very unlikely).
There are other potential causes but none that are likely on a mass produced car. The causes of toe out on the move are potentially varied, but as per my previous post a fraction more toe in should be enogh to counteract this.
Hope this helps.
monkfish1 said:
Jeff
Ive certainly seen no rubbing problems on any cars so far. I'm still of the view that the tracking when checked OK statically, changes slighly when on the move. The inner edge will normally only wear because, a) there is toe out (on the move?), b) excessive negative camber (visibly detectable and very unlikely).
There are other potential causes but none that are likely on a mass produced car. The causes of toe out on the move are potentially varied, but as per my previous post a fraction more toe in should be enogh to counteract this.
Hope this helps.
I've been on the GTO forum and had a lot of info from these guys who have similar problems. Apparently, it is an issue that GM are aware of but it is a little too technical for me to describe in detail. The thread is : www.ls1gto.com/forums/showthread.php?t=55726 . It is something I must get sorted whatever or I'll be spending a pretty penny on rubber rather than Monkfish upgrades! The adjustment on the front end has been adjusted as far as possible and is just about within the ranges specified on the alignment spec sheet from Vauxhall. Perhaps some of you technically minded guys can suggest what to do for a fix
(preferably paid for by Vauxhall) 
>> Edited by V6 JDT on Wednesday 4th January 22:05
My experience is identical to GSE. 15K miles on orig rubber badly worn on inner edge. Fitted F1s all round before christmas, now have a pull to left ! Had 4 wheel align done and all in spec so where is the problem ! Was fine on the old tyres. Could it be a characteristic of the F1s? One thing is, when the camber slopes to the left it pulls left, but on a right camber, it runs slightly right - so maybe the toe in increase would help - dont know. If anyone gets to the root of the prob please advise !!
Cheers, V8Dave
Cheers, V8Dave
Gassing Station | HSV & Monaro | Top of Page | What's New | My Stuff