F Type twitchiness
Discussion
I've had a P575 from new and have covered about 15k miles in that time. The car has been delightful over relaxed long distance driving as well as the odd lairy squirt. However, I changed the rear tyres a couple of months ago and it's turned the car into a bit of a twitchy mess - I thought it may be an imbalance between the used fronts and the new rears but it still remains about 2K later. New tyres are the same as the old and I keep on top of tyre pressures etc. It is disconcerting because it feels like it's occasionally steering from the rear and it now hates camber changes that it used to ignore. I've fiddled about a little with pressures and the alignment has been checked - all seems fine but the car has changed.
Anyone experienced similar before I trouble the dealer?
Anyone experienced similar before I trouble the dealer?
I'd suspect the tyre compound has maybe changed from the original tyres, or they were a specific one (for example N spec in addition to the standard tyre).
You've not fitted Dunlop Sport Maxx have you? They're somewhat legendary for being a bit wayward, despite being OE fitment. When I needed tyres for my XK I dropped the Sport Maxx for Pilot Sport 4 S all round. I've only got 60% of your power, being only a N/A 4.2 but I'd still not be comfortable on lesser rubber.
You've not fitted Dunlop Sport Maxx have you? They're somewhat legendary for being a bit wayward, despite being OE fitment. When I needed tyres for my XK I dropped the Sport Maxx for Pilot Sport 4 S all round. I've only got 60% of your power, being only a N/A 4.2 but I'd still not be comfortable on lesser rubber.
Edited by Vsix and Vtec on Thursday 16th November 12:16
Thank you, they're Pirelli's - in theory exactly the same as the ones they replaced but I will have a look at the codes when I get back. I'm used to the Porsche N code but does anyone know if Jaguar is the same and, if so, what's the code?
If that's the case, will need to work out whether to replace front, back, or, unhappily, all four!
If that's the case, will need to work out whether to replace front, back, or, unhappily, all four!
When I first bought my XKR about 5 years ago the rear was frankly quite scary with the squiggling the back end could do on anything other than perfect surfaces and with the foot down, the whole back end would wobble around.
Fitted new rears, went for the correct width, Dunlops, 'J' rated - car was perfect as it should be.
The tyres that were on it when I got it were Pirellis, but also too wide by 10mm. Just getting the right tyres on the car transformed it.
Fitted new rears, went for the correct width, Dunlops, 'J' rated - car was perfect as it should be.
The tyres that were on it when I got it were Pirellis, but also too wide by 10mm. Just getting the right tyres on the car transformed it.
TarquinMX5 said:
Perfect.I’ve got Maserati rears!
Robbidoo said:
I had the original F-Type R RWD and when I changed from the Pirellis to PS4S it made the car so much more predictable I couldn't quite believe it. Just something to consider.
^^^^^ this all day long. Pirelli tyres are truly awful things. MPS4S transformed my FTR and my previous car, an XFR-S. In fact on the R-S they made it drivable in the wet. It was horrific on Pirellis. That's an odd one, given that they're the same brand and you've put 2k of wear on them.
If the old ones were worn, could it be that car's traction control was accounting for this by actually holding a bit more power back in certain scenarios, hence it felt more controllable...?
On the wider topic of tyre choice, the previous owner of my F-Type P450 fitted Michelin PS4s and I will undoubtedly stick with them. For a torquey supercharged V8, the level of grip is insane.
If the old ones were worn, could it be that car's traction control was accounting for this by actually holding a bit more power back in certain scenarios, hence it felt more controllable...?
On the wider topic of tyre choice, the previous owner of my F-Type P450 fitted Michelin PS4s and I will undoubtedly stick with them. For a torquey supercharged V8, the level of grip is insane.
YorksLS18 said:
That's an odd one, given that they're the same brand and you've put 2k of wear on them.
If the old ones were worn, could it be that car's traction control was accounting for this by actually holding a bit more power back in certain scenarios, hence it felt more controllable...?
On the wider topic of tyre choice, the previous owner of my F-Type P450 fitted Michelin PS4s and I will undoubtedly stick with them. For a torquey supercharged V8, the level of grip is insane.
It is an odd one but I've had the car from new and it never behaved like this with an all new set. I have checked the codes and whilst it's essentially the same tyre the code on the rears is a Maserati one. I need to work out whether I bin the lot and start with Michelin or have another go with Pirelli. If the old ones were worn, could it be that car's traction control was accounting for this by actually holding a bit more power back in certain scenarios, hence it felt more controllable...?
On the wider topic of tyre choice, the previous owner of my F-Type P450 fitted Michelin PS4s and I will undoubtedly stick with them. For a torquey supercharged V8, the level of grip is insane.
ettore said:
YorksLS18 said:
That's an odd one, given that they're the same brand and you've put 2k of wear on them.
If the old ones were worn, could it be that car's traction control was accounting for this by actually holding a bit more power back in certain scenarios, hence it felt more controllable...?
On the wider topic of tyre choice, the previous owner of my F-Type P450 fitted Michelin PS4s and I will undoubtedly stick with them. For a torquey supercharged V8, the level of grip is insane.
It is an odd one but I've had the car from new and it never behaved like this with an all new set. I have checked the codes and whilst it's essentially the same tyre the code on the rears is a Maserati one. I need to work out whether I bin the lot and start with Michelin or have another go with Pirelli. If the old ones were worn, could it be that car's traction control was accounting for this by actually holding a bit more power back in certain scenarios, hence it felt more controllable...?
On the wider topic of tyre choice, the previous owner of my F-Type P450 fitted Michelin PS4s and I will undoubtedly stick with them. For a torquey supercharged V8, the level of grip is insane.
As a slight tangent, do you mind me asking what your overall impression of the P575 is (tyre issues aside)? How usable is the power delivery when it's behaving itself?
I'm very impressed with my 450 and my budget wouldn't stretch to the 575. But it's a strong contender when I change mine.
It’s a hoot.
Power delivery is fine because it manages a Jekyll and Hyde effect. I use it as my primary car so it gets used all year round and pretty much in most conditions - 4WD keeps it feeling super secure and it remains refined, comfortable and calm.
In sport, I don’t use the most aggressive throttle map because it’s oversensitive and really only suited to the track - otherwise it’s pretty ballistic when requested. The newer/facelift cars sound better and cleaner when being thrashed IMO.
Power delivery is fine because it manages a Jekyll and Hyde effect. I use it as my primary car so it gets used all year round and pretty much in most conditions - 4WD keeps it feeling super secure and it remains refined, comfortable and calm.
In sport, I don’t use the most aggressive throttle map because it’s oversensitive and really only suited to the track - otherwise it’s pretty ballistic when requested. The newer/facelift cars sound better and cleaner when being thrashed IMO.
ettore said:
It is an odd one but I've had the car from new and it never behaved like this with an all new set. I have checked the codes and whilst it's essentially the same tyre the code on the rears is a Maserati one. I need to work out whether I bin the lot and start with Michelin or have another go with Pirelli.
II have had the Pirelli P Zero as Standard Fitment on my last five Cars and each time apart from the one instance have changed them for Michelin . Across a V8 R an SVR two Vantages and a 911 GTS the Porsche was the one exception . I cant tell you how delighted I was to find that Michelins came as Standard Fitment on my latest Cayman 4.0 GTS . I drove all these Cars daily and I am of the view that with the correct Alignment and Balancing the Michelins will be a game changer for you as it was on my SVR . This being a Forum doubtless someone will say I fitted the Michelin and didn't notice any difference . What they need to do is get into a bend North of 100mph then you will feel the difference . That said....roaring over Shap and into Penrith at some speed the 991 911 GTS was rock solid on the P Zeros and I was surprised by that so I kept them fitted for the 5 months I owned the Carettore said:
It’s a hoot.
Power delivery is fine because it manages a Jekyll and Hyde effect. I use it as my primary car so it gets used all year round and pretty much in most conditions - 4WD keeps it feeling super secure and it remains refined, comfortable and calm.
In sport, I don’t use the most aggressive throttle map because it’s oversensitive and really only suited to the track - otherwise it’s pretty ballistic when requested. The newer/facelift cars sound better and cleaner when being thrashed IMO.
Cheers for that, sounds like the perfect car in all other respects. I also love the Jekyll and Hyde personality and have used exactly the same term to describe it! Power delivery is fine because it manages a Jekyll and Hyde effect. I use it as my primary car so it gets used all year round and pretty much in most conditions - 4WD keeps it feeling super secure and it remains refined, comfortable and calm.
In sport, I don’t use the most aggressive throttle map because it’s oversensitive and really only suited to the track - otherwise it’s pretty ballistic when requested. The newer/facelift cars sound better and cleaner when being thrashed IMO.
In fact, I had a Mercedes C250 Sport prior to the F-Type, and the Jag in Comfort mode is actually far smoother than that car.
I hope you get the tyres sorted - sounds like a beast and a ton of fun once you tame the grip issue.
ettore said:
It’s a hoot.
Power delivery is fine because it manages a Jekyll and Hyde effect. I use it as my primary car so it gets used all year round and pretty much in most conditions - 4WD keeps it feeling super secure and it remains refined, comfortable and calm.
In sport, I don’t use the most aggressive throttle map because it’s oversensitive and really only suited to the track - otherwise it’s pretty ballistic when requested. The newer/facelift cars sound better and cleaner when being thrashed IMO.
AWD as opposed to 4WD as you say makes a world of difference . Power delivery is fine because it manages a Jekyll and Hyde effect. I use it as my primary car so it gets used all year round and pretty much in most conditions - 4WD keeps it feeling super secure and it remains refined, comfortable and calm.
In sport, I don’t use the most aggressive throttle map because it’s oversensitive and really only suited to the track - otherwise it’s pretty ballistic when requested. The newer/facelift cars sound better and cleaner when being thrashed IMO.
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