Author Topic: Sawtooth  (Read 5416 times)

Offline monsta

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Re: Sawtooth
« Reply #10 on: 15 August 2017, 19:14 »
Tracking, not the VW tracking figures. Had it done on my CC's to stop it and never had a problem again, plus point was a nice little bit of lift off oversteer when i wanted a bit of fun. You will need to find someone that knows how to do it though, I have mine done in Birmingham.

Yeah makes sense, so they basically set the tracking up for you instead of following VW's tolerances/figures?

I'll have to find a decent tyre specialist not a Halford's autocentre  :grin:

Offline Daz Auto

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Re: Sawtooth
« Reply #11 on: 16 August 2017, 09:49 »
When I was getting the summer tyres on our other car - there was a GTI in front of me. He was getting 2 new tyres on because the inside of the tyres were bald. The staff told me that most of these cars have the same issue.

I certainly had problems with the Mk6 and uneven tyre wear.

Once my GTI has done a couple of thousand miles and the new suspension has bedded in - I'm going to look for a Hunter Hawkeye laser alignment on all 4 wheels.

10/8/2017 - GTI Performance, Red,5dr DS

Offline fredgroves

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Re: Sawtooth
« Reply #12 on: 16 August 2017, 11:43 »
I suspect that making wheel alignment changes outside of OEM spec will have some other sort of negative.

The OEM setup, like any setup, will be to achieve a set of performance parameters (handling, comfort, tyre wear, turning, braking etc). As with all such things, you can't have your cake and eat it. If you fix one thing, you'll unfix something else.

Its probably more likely some suspension component that has a wide manufacture tolerance on it.

Not everyone gets sawtooth do they?
Current: Mk8 GTI DSG, Adelaides, DCC, HUD, HK, Winter Pack, Rear Camera.. Aka "HMS Weasel"

Gone: 2017 Mk7.5 GTD,manual, NavPro
Gone: 2014 Mk7 GTD, manual, NavPro, DCC

Offline I wanted a GTi

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Re: Sawtooth
« Reply #13 on: 16 August 2017, 15:14 »
I suspect that making wheel alignment changes outside of OEM spec will have some other sort of negative.

The OEM setup, like any setup, will be to achieve a set of performance parameters (handling, comfort, tyre wear, turning, braking etc). As with all such things, you can't have your cake and eat it. If you fix one thing, you'll unfix something else.

Its probably more likely some suspension component that has a wide manufacture tolerance on it.

Not everyone gets sawtooth do they?

VW and most other general car makers set their cars up for understeer hence the reason that a lot of cars suffer from rear inside edge ware. Changing the setting that to a more even steering and it does or at least did in my case introduce lift-off oversteer which can be fun when the conditions are right.

The Cup 2 below had covered around 15k miles on the back of my car, the right side is the inside.

5 door GTD in night blue collected 1/3/17

Offline fredgroves

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Re: Sawtooth
« Reply #14 on: 16 August 2017, 15:28 »
Well, understeer is safer on the road for most drivers and if that results in rear inside edge wear, thats probably a decent trade off.

Having to replace my rears after 3 years instead of 3.5 years is a fair compromise vs spinning into a tree :)

I guess VW's legal department probably agree!
Current: Mk8 GTI DSG, Adelaides, DCC, HUD, HK, Winter Pack, Rear Camera.. Aka "HMS Weasel"

Gone: 2017 Mk7.5 GTD,manual, NavPro
Gone: 2014 Mk7 GTD, manual, NavPro, DCC

Offline I wanted a GTi

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Re: Sawtooth
« Reply #15 on: 16 August 2017, 17:31 »
Well, understeer is safer on the road for most drivers and if that results in rear inside edge wear, thats probably a decent trade off.

Having to replace my rears after 3 years instead of 3.5 years is a fair compromise vs spinning into a tree :)

I guess VW's legal department probably agree!

On the contrary the car handled better and oversteer could only be induced by lift off mid way through a bend so not exactly dangerous for anyone but the worst of drivers. Also the extra wear is not the worst part of the problem, the extra rough noise it generates is the most annoying part.
5 door GTD in night blue collected 1/3/17

Offline fredgroves

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Re: Sawtooth
« Reply #16 on: 16 August 2017, 17:53 »
If you are VW's legal department then you assume that every customer is a moron... and probably apart from all of us F1 world championship winning drivers on this forum, everyone else probably is ;-) From their lawyer perspective, its cheaper for VW to prevent mid corner lift off spins by engineering.

PS I only got rid of my messed up ones because the noise was driving me mad :)

PPS I am the world's second best driver. My skill is so great that my modesty allows me to assume that possibly somewhere in the world there is one better driver. That's how good I am :-P
Current: Mk8 GTI DSG, Adelaides, DCC, HUD, HK, Winter Pack, Rear Camera.. Aka "HMS Weasel"

Gone: 2017 Mk7.5 GTD,manual, NavPro
Gone: 2014 Mk7 GTD, manual, NavPro, DCC

Jackie Treehorn

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Re: Sawtooth
« Reply #17 on: 17 August 2017, 08:56 »
Well, understeer is safer on the road for most drivers and if that results in rear inside edge wear, thats probably a decent trade off.

Having to replace my rears after 3 years instead of 3.5 years is a fair compromise vs spinning into a tree :)

I guess VW's legal department probably agree!

On the contrary the car handled better and oversteer could only be induced by lift off mid way through a bend so not exactly dangerous for anyone but the worst of drivers. Also the extra wear is not the worst part of the problem, the extra rough noise it generates is the most annoying part.

I think Lift off oversteer is considered more dangerous, ask the rental owners of Megane's at the Ring. Never a lack of people lifting mid corner and running out of space or talent.  Throttle oversteer is different, to be celebrated and enjoyed, lift off is pointless in most cases on most hatchbacks. But as fredgroves says the legal dept probably got it right, with a few concessions.

PS what is wrong with your cup 2 in the pic, i couldn't see much?

Offline mcmaddy

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Re: Sawtooth
« Reply #18 on: 17 August 2017, 11:46 »
Subtle tyre pressure changes will help with any saw tooth nonsense. It's usually failed suspension components and not alignment that's the issue.
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Offline I wanted a GTi

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Re: Sawtooth
« Reply #19 on: 17 August 2017, 12:51 »
Well, understeer is safer on the road for most drivers and if that results in rear inside edge wear, thats probably a decent trade off.

Having to replace my rears after 3 years instead of 3.5 years is a fair compromise vs spinning into a tree :)

I guess VW's legal department probably agree!

On the contrary the car handled better and oversteer could only be induced by lift off mid way through a bend so not exactly dangerous for anyone but the worst of drivers. Also the extra wear is not the worst part of the problem, the extra rough noise it generates is the most annoying part.

I think Lift off oversteer is considered more dangerous, ask the rental owners of Megane's at the Ring. Never a lack of people lifting mid corner and running out of space or talent.  Throttle oversteer is different, to be celebrated and enjoyed, lift off is pointless in most cases on most hatchbacks. But as fredgroves says the legal dept probably got it right, with a few concessions.

PS what is wrong with your cup 2 in the pic, i couldn't see much?

There is nothing wrong with it at all, that was my point. With VW alignment specs it would have been destroyed in less than 10k miles but with the changes to the alignment it has even wear.
5 door GTD in night blue collected 1/3/17