Clivescoobydo Posted November 12, 2017 Report Share Posted November 12, 2017 Apologies if I'm repeating a previous post but I went for a drive down the A24 yesterday and nearly lost the rear twice. The P zero tyres on the rear are showing signs of wear in the middle, the road was greasy damp and I'm used to 4 wheel drive but to loose the rear end at slightly faster than normal speeds was a bit disconcerting. I had a smile but the wife went quite for 20 mins! (every cloud has a silver lining lol). I also noticed the rear end 'skipping' across white lines/cats eyes during lane changing. By just pushing today, the rear shocks feel soft and bouncy so I'm assuming thier the first thing to replace? The car recently passed an MOT not that it means much. Appreciate your comments and any guidance on cost, thanks. Link to comment Share on other sites More sharing options...
Boxstercol Posted November 12, 2017 Report Share Posted November 12, 2017 There's been a few people on various Porsche forums who have been a little surprised by Pirelli rubber on damp surfaces, personally after reading the experiences of others I wouldn't buy them. Link to comment Share on other sites More sharing options...
Billzeebub Posted November 12, 2017 Report Share Posted November 12, 2017 Rear tyres that are heading towards the limit will be fine in the dry but need to be wary in wet/damp conditions regardless of brand. Does your Car have PSM? I only really 'drive' mine when it's dry Link to comment Share on other sites More sharing options...
PaulQ Posted November 12, 2017 Report Share Posted November 12, 2017 It could well be the tyres if they are getting low, but get your alignment checked too as this can cause the problems you describe if its out. Unless the shocks are leaking badly (would have been picked up on the MOT) , I wouldn't have thought they would be an issue. Link to comment Share on other sites More sharing options...
Clivescoobydo Posted November 12, 2017 Author Report Share Posted November 12, 2017 It does billzeebub but I managed to luckily catch both by quickly counter steering. Do you have any warning signs on the dash that the PSM is working? I'm used to the motor bike world with flickering dash lights. Link to comment Share on other sites More sharing options...
Nobbie Posted November 12, 2017 Report Share Posted November 12, 2017 Have you checked the tyre pressures? Wearing in the middle of the tread can be a sign of over inflation which won't help rear end grip. Link to comment Share on other sites More sharing options...
Jon61 Posted November 12, 2017 Report Share Posted November 12, 2017 I'm not saying your tyres, shocks etc aren't partly to blame, but there are a couple of roundabouts on the A24 as it bypasses west of Horsham that are notoriously slippery. I'vé felt the back end twitching (the car's, not mine ) several times on the Robin Hood roundabout, and recently saw a fiesta-sized car of some sort do a 180 degree spin on the Great Daux roundabout - in traffic, so at no great speed. Link to comment Share on other sites More sharing options...
Clivescoobydo Posted November 12, 2017 Author Report Share Posted November 12, 2017 2 minutes ago, PaulQ said: It could well be the tyres if they are getting low, but get your alignment checked too as this can cause the problems you describe if its out. Unless the shocks are leaking badly (would have been picked up on the MOT) , I wouldn't have thought they would be an issue. Thanks PaulQ I would have also thought if the shocks were on their way out I would have got 'knocking' but the car rides smooth. I'll get it checked.out and stay clear of Pirellis lol. Link to comment Share on other sites More sharing options...
Clivescoobydo Posted November 12, 2017 Author Report Share Posted November 12, 2017 2 minutes ago, Nobbie said: Have you checked the tyre pressures? Wearing in the middle of the tread can be a sign of over inflation which won't help rear end grip. Thanks Nobbie ? tyre pressures all good, were miles out when I got it, first thing I corrected. Link to comment Share on other sites More sharing options...
Clivescoobydo Posted November 12, 2017 Author Report Share Posted November 12, 2017 3 minutes ago, Jon61 said: I'm not saying your tyres, shocks etc aren't partly to blame, but there are a couple of roundabouts on the A24 as it bypasses west of Horsham that are notoriously slippery. I'vé felt the back end twitching (the car's, not mine ) several times on the Robin Hood roundabout, and recently saw a fiesta-sized car of some sort do a 180 degree spin on the Great Daux roundabout - in traffic, so at no great speed. Funny you should say that Jon61 one event was the first roundabout near Horsham after the single carriageway bit down from Dorking. Because I'm a biker I'm always looking at the road surface like a hawk and I'm sure the road had spilt fuel plumeing all over it. Well that was my excuse to the wife lol. Link to comment Share on other sites More sharing options...
Menoporsche Posted November 12, 2017 Report Share Posted November 12, 2017 Pirellis not very popular on this board, at least in 986 sizes. Link to comment Share on other sites More sharing options...
Jon61 Posted November 12, 2017 Report Share Posted November 12, 2017 3 minutes ago, Clivescoobydo said: Funny you should say that Jon61 one event was the first roundabout near Horsham after the single carriageway bit down from Dorking. Because I'm a biker I'm always looking at the road surface like a hawk and I'm sure the road had spilt fuel plumeing all over it. Well that was my excuse to the wife lol. That one you described is the Great Daux roundabout. Not had any incidents on that myself (usually turning left or right), but was surprised to see the other car spin on it. The one I treat carefully is the next roundabout south of there, where I'm usually going straight through, where the car often gets twitchy. Link to comment Share on other sites More sharing options...
jimk04 Posted November 12, 2017 Report Share Posted November 12, 2017 Also sounds like you have excessive rear toe in to me. They become real twitchy if set like that Link to comment Share on other sites More sharing options...
Billzeebub Posted November 12, 2017 Report Share Posted November 12, 2017 49 minutes ago, Clivescoobydo said: It does billzeebub but I managed to luckily catch both by quickly counter steering. Do you have any warning signs on the dash that the PSM is working? I'm used to the motor bike world with flickering dash lights. I would day if your PSM dash light is flickering in the wet you are already in trouble. I have owned three cars with PSM and always have it switched on unless bone dry and warm. I have never experienced the warning light as I reign it in when conditions are problematic Link to comment Share on other sites More sharing options...
Clivescoobydo Posted November 12, 2017 Author Report Share Posted November 12, 2017 5 minutes ago, Billzeebub said: I would day if your PSM dash light is flickering in the wet you are already in trouble. I have owned three cars with PSM and always have it switched on unless bone dry and warm. I have never experienced the warning light as I reign it in when conditions are problematic 29 minutes ago, jimk04 said: Also sounds like you have excessive rear toe in to me. They become real twitchy if set like that Does the PSM default to on at start up? Or do you have the option to have it on or off at anytime and it stays that way? The other feeling I have is a kind of 'choppy' or 'twitchy' feeling at the back end when crossing lane markings or cats eyes on the diagonal which made me think suspension. Would toe in result in uneven tyre wear? I'll get the alignment checked during the new tyre fit. Link to comment Share on other sites More sharing options...
Billzeebub Posted November 12, 2017 Report Share Posted November 12, 2017 PSM should be default on. Getting an alignment done should defo be the first port of call. Ideally at a decent marque specialist. The best of them will give the car a general look-over with the 111 point check and attention paid to any feedback you can give them on handling. You should then get a list of preventative maintenance with order of importance specified. Revolution oop north are superbly regarded as are Eporsh in Surrey Link to comment Share on other sites More sharing options...
RBD914 v2 Posted November 12, 2017 Report Share Posted November 12, 2017 Don't know why some people sl*g off the Pirellis, I've had them on all my Porsche's over the years and never had an issue with them! Still got them on my 987.2 and I had no grip problems in wet conditions at a brisk pace on the recent Borders run, nothing wrong with Pirellis in my opinion. Link to comment Share on other sites More sharing options...
bagss2 Posted November 12, 2017 Report Share Posted November 12, 2017 3 minutes ago, RBD914 v2 said: Still got them on my 987.2 and I had no grip problems in wet conditions at a brisk pace on the recent Borders run, nothing wrong with Pirellis in my opinion. That was barely brisk Rob, you weren't even trying! My Michelin PS2s were very happy with the pace & conditions, as was I. Cheers, Baggers. Link to comment Share on other sites More sharing options...
StephenM Posted November 12, 2017 Report Share Posted November 12, 2017 Must admit I have two sets Pirelli zeros and Michelin PS2 and feel the Michelins much more sure footed in the wet. Link to comment Share on other sites More sharing options...
Clivescoobydo Posted November 12, 2017 Author Report Share Posted November 12, 2017 52 minutes ago, RBD914 v2 said: Don't know why some people sl*g off the Pirellis, I've had them on all my Porsche's over the years and never had an issue with them! Still got them on my 987.2 and I had no grip problems in wet conditions at a brisk pace on the recent Borders run, nothing wrong with Pirellis in my opinion. I'm having trouble on twisty damp A roads at the speed limit say 50 mph. Somethings not right and I can't believe it's just the P Zero tyres at low tread levels. I'll post some pics of my current tyre condition for opinions and probably use EPorsch for a check in due course. Kinda worries me though that owners don't rate the Boxsters handling in the wet ? With its low C of G and 225/255's for me that should still be better than the average car. Link to comment Share on other sites More sharing options...
edc Posted November 12, 2017 Report Share Posted November 12, 2017 Sounds like your geo is out. The car should handle very competently in all weathers. Are your tyres matching front to rear? Link to comment Share on other sites More sharing options...
Clivescoobydo Posted November 12, 2017 Author Report Share Posted November 12, 2017 1 hour ago, edc said: Sounds like your geo is out. The car should handle very competently in all weathers. Are your tyres matching front to rear? No EDC the fronts are Dunlops and newer, probably not in bad condition either, but I hate dissimilar tyres on anything. I won't be fitting matching Dunflops on the rear so I'll replace all four. Although the front has grip it's the rear that's stepping out. Link to comment Share on other sites More sharing options...
Southy Posted November 12, 2017 Report Share Posted November 12, 2017 whats PSM? Link to comment Share on other sites More sharing options...
edc Posted November 12, 2017 Report Share Posted November 12, 2017 Costco £50 off a set of 4 Michelins fitted at the moment. They are normally amongst the cheapest around anyway. They tend to stock Michelin Pilot Sport4. That's what i will be going for in the next 18 months when needed (unless superceded!). Link to comment Share on other sites More sharing options...
the baron Posted November 13, 2017 Report Share Posted November 13, 2017 If it’s skipping across white lines etc, this is more than likely your wheel alignment. Go to a garage that has Hunter equipment. Also check your tyre pressures. Link to comment Share on other sites More sharing options...
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