QP V Sport GTS - Back end ‘wiggles’ when lifting off after hard acceleration

[mowlas]

Tim, the biggest thing is the age and condition of the tyres. Older, harder tyres will tramline worse, whereas newer tyres will have better give and contact.

Agree with having the same tread/tyres on the same axle.

Definitely check the age and condition of the part worns you have.

 

[Harvey_Tim]

Definitely check the age and condition of the part worns you have.

Yes, I recently did just this and although the condition of both tyres look good and have no cracks and no repairs etc. I was disappointed to see that one was date stamped 2018 and the other was 2008!. I have already decided to scrap the 2008 tyre and unless I can find a suitable replacement I may just bite the bullet and fit new Michelins.

And then get the alignment done too.

Thanks for everyone’s input.

 

[cheburator]

What a coincidence - when I bought my car in April it also wiggled to the left at every gear change under hard acceleration. Took it to my local tyre place which does wheel alignment on quite a few tasty track cars including mine . Lo and behold - rear tyres were like this \\ instead of being like this / \ Set it up to factory rear settings and Grace Jones has been spotless.

As for the settings - while the factory settings for the rear are spot on, the front are a bit suspect in my opinion. Giving the front axle toe out is fine on a race car as it gives you better turn in, but on a road car?! Yes, you get a nice darty steering which is a bonus on a big beast, but it also would wear your front tyres in less than 7k miles. I would keep the camber settings stock, but I personally would also add as much castor as possible. It would help with dynamic camber, would add weight to the steering and would also allow you to run slight toe-in - like +2’ each side (I am talking in minutes for the avoidance of doubt and not in mm - any Hunter machine can convert seamlessly between units). These front axle settings should give you decent tyre life and still great handling. Let us know how you get on.

 

[alastairb]

unless I can find a suitable replacement ....

Camskill have most tyres in stock. Had PS4's before I pulled the plug on ContiSport Contact 7's

 

[Harvey_Tim]

To all those of you who suggested tyres

Today I had a pair of part worn never repaired Pirelli P Zeroes with a good 6mm tread and DOT 2720 date stamp fitted for the bargain price of £80 for the pair!!!. The difference was immediately night and day, I have so much more confidence in the car now it doesn’t skip around and the back end “wiggle” that was so disconcerting has gone.

I might still get the alignment checked some time in the future but for now this has been a great improvement.

 

[Sam McGoo]

To all those of you who suggested tyres

Today I had a pair of part worn never repaired Pirelli P Zeroes with a good 6mm tread and DOT 2720 date stamp fitted for the bargain price of £80 for the pair!!!. The difference was immediately night and day, I have so much more confidence in the car now it doesn’t skip around and the back end “wiggle” that was so disconcerting has gone.

I might still get the alignment checked some time in the future but for now this has been a great improvement.

Blimey, it must have been bad if fitting P-Zeros has improved it

 

[philw696]

Ha ha the Pirelli haters will love this

 

[Harvey_Tim]

Ha ha the Pirelli haters will love this

All I can say is that an obviously really bad set of P Zeroes, replaced by a better set of the same made a very noticeable difference …. I don’t have any experience of any other brands on the Maserati so I don’t know if PS4’s (for example) would be amazing in comparison.

 

[philw696]

All I can say is that an obviously really bad set of P Zeroes, replaced by a better set of the same made a very noticeable difference …. I don’t have any experience of any other brands on the Maserati so I don’t know if PS4’s (for example) would be amazing in comparison.

I've no issues with Pirelli myself just appears that preferred choice on here is Michelin.

 

[cheburator]

I've no issues with Pirelli myself just appears that preferred choice on here is Michelin.

And yet, the new Bridgestone Potenza Sport trounced the Michelin PS4s in all objectve tests... No issues with Pirelli either. Conti Sport Contact 7 is perhaps the best all round tyre on the market currently, but you never hear about them fitted to Maseratis...

 

[ChrissGT]

The sportcontact7 doesnt come in OEM size on the rear. So thats a bit of an issue with tires for these cars. Pirelli and Michelin always have the sizes, other brands you have make a compromise.

 

[alastairb]

The sportcontact7 doesnt come in OEM size on the rear. So thats a bit of an issue with tires for these cars. Pirelli and Michelin always have the sizes, other brands you have make a compromise.

285/30/20 - This is early QP5 OEM isnt it?

Continental Tyres / Car / Continental Conti Sport Contact 7 285/30 R20 (99Y) XL FR TL Fuel Eff.: C Wet Grip: A NoiseClass: B Noise: 75dB Car Tyres - MPV Tyres - People Carrier Tyres - 20" R20" - 285/30/20, 285/30R20

Buy online cheap Continental Tyres / Car / Continental Conti Sport Contact 7 285/30 R20 (99Y) XL FR TL Fuel Eff.: C Wet Grip: A NoiseClass: B Noise: 75dB

www.camskill.co.uk

I've done about 1k miles now on Conti Sport Contact 7 (245/35 / 295/30) - I like them and they compare well to PS4S imo, great in the wet. There was plenty of tread left on my old PS4S so im not comparing a dead tyre to a brand new one.

 

[alastairb]

but you never hear about them fitted to Maseratis...

most car forums are like this though with tyres. Not many people want to experiment with a 1k set of tyres to find out they are a backwards step to the norm.

other than temperature, I would hazard a guess that most people wouldnt be able to tell the difference between the high performance tyre choices anyway. Whos really driving a QP5 on the limit ?

 

[rs48635]

To all those of you who suggested tyres

Today I had a pair of part worn never repaired Pirelli P Zeroes with a good 6mm tread and DOT 2720 date stamp fitted for the bargain price of £80 for the pair!!!. The difference was immediately night and day, I have so much more confidence in the car now it doesn’t skip around and the back end “wiggle” that was so disconcerting has gone.

I might still get the alignment checked some time in the future but for now this has been a great improvement.

glad you confirmed my own experience. The lift off skip to the left was not so pronounced on my 2006 QP but tram lining was quite unnerving.
Suspect any new tyre will cure the wiggle / tramline issue. My own rears were legal, but ( almost) lethal when pressing on.

Decided to switch from P-zero to Michelin Pilot Sport ( four at the time or 4s ) based on forum experience.

 

[ChrissGT]

Granturismo runs on 285/40. I agree that most wont really test the car in such a way that you notice a big difference in tires.

 

[Gazcw]

Another reason for a wiggle is a bent wheel. When I accelerated hard in the Strad it wiggled and any speed ‘on track’ above 120 it was very wiggly. Two bent front wheels identified and sorted now good at any speed.

 

[JonnyWhitters]

Not a wiggle on lift off, but this car tramlines worse than my old 323i

 

[Sam McGoo]

Not a wiggle on lift off, but this car tramlines worse than my old 323i

This....

I would then follow up with a 4 wheel alignment (at a decent place) and aim to get rid of any 'Toe Out' front or back and go either neutral or a little 'Toe in' to stabilise the handling.
Whilst doing the above, the garage will be able to advise whether your bushes are worn/torn. If so, they'll need replacing.

 

[philw696]

Not a wiggle on lift off, but this car tramlines worse than my old 323i

Mazda or BMW ?

 

[Gazcw]

All I can say is that an obviously really bad set of P Zeroes, replaced by a better set of the same made a very noticeable difference …. I don’t have any experience of any other brands on the Maserati so I don’t know if PS4’s (for example) would be amazing in comparison.

May have been mishaped. Had that a few times on other cars.