993 Wandering badly

993 Wandering badly

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Ocho

Original Poster:

604 posts

237 months

Saturday 6th January 2018
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PH5121 said:
I've always used N rated Bridgestones on my 993, but my dad bought a 993 turbo fitted with the same tyres you have. He took them off and threw them away as they were terrible.

Hopefully new tyres will solve the issue.
Interesting. Anyone else with experience of P Zeros on a 993 C2? Good and bad?

PTT

664 posts

121 months

Saturday 6th January 2018
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P Zero's on my 996: Terrible Car was at speed all over the place.. Went for Michelin never a problem.

BrewsterBear

1,506 posts

192 months

Saturday 6th January 2018
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Ocho said:
Interesting. Anyone else with experience of P Zeros on a 993 C2? Good and bad?
Yes. When I bought a 993 C2 many years ago it came to me with Pirelli P Zero tyres and they were downright dangerous. I can't remember what I fitted in their place, but they were infinitely better. I have a Civic Type R as a runaround at the moment. It also came to me with P Zeroes and they were also crap.

I wouldn't fit Pirellis to a pram. They are terrible tyres and anyone who disagrees doesn't drive their car properly.

dmarkovina

639 posts

83 months

Saturday 6th January 2018
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How old are the tyres and how much thread is left?

911Al

224 posts

176 months

Sunday 7th January 2018
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Just an idea but have you tried driving it with a full tank. In my experience air cooled 911s ride better with a bit of weight up front.

Ocho

Original Poster:

604 posts

237 months

Sunday 7th January 2018
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911Al said:
Just an idea but have you tried driving it with a full tank. In my experience air cooled 911s ride better with a bit of weight up front.
Good point, but yes it was a long journey all round so had a full tank, plus luggage under the bonnet too (although I appreciate a couple of bags of clothes don’t actually weigh that much!)

Had no time free to take any action yet, but promise to report in when I do.

alanshaw

195 posts

93 months

Monday 8th January 2018
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I took my 9mnth old Cayman on P zero's from new,out for a run yesterday, as it was sunny, not driven it for a month.

Took about 6miles for the tyres to come up to temperature, doing about 70-85 on dual carriageway, car felt strange @ front felt like it was wandering, slowed to 65 ...........fine.
Tyres pressures were front L 2.1 R 2.2, rear both 2.1.
On way back home took it back up to 95, just felt unstable, so slowed again... home @ 65..@ least I got 32mpg !..........I have not had this problem in the summer ?.....I assumed it must be the cooler temperatures as tyres maybe only fit for summer driving ?


Ocho

Original Poster:

604 posts

237 months

Wednesday 7th February 2018
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Hi all

Thanks to everyone for their input and suggestions. All fixed now and running as it should do. Took a while to get taken care of as so busy...

So, here comes big time confession of what's probably sacrilege to most Porsche owners by way of an explanation of what had gone wrong...


In order to save a few pennies (I've overstretched myself buying the car in the first place, but it was EXACTLY what I've been looking for since I sold the last 993 in 2006 and when I saw it advertised I kind of knew I'd find a way to buy it whether I could afford it or not...), when it came to replacing the tyres I went down the part worn route rather than budget brand, thinking that it would at least give me a well-developed product albeit with a shorter lifespan - shouldn't be an issue as it's a second car so my mileage will be low. So 5/6mm part worn P Zeros all round in December... Then I got the issues that started this thread.

So, when I finally got round to looking at resolving the wandering last week, I thought I'd give another pair or part worns a go at the front to see if it cured the issue. £190 for the pair (P Zero N2s again) this time with 7mm tread, instead of around £165 each. So took it to the place selling them to be fitted and he showed me the tyres before fitting them and they immediately appeared to me so much better (newer, better condition rubber) than the others that I'd received in the post and had fitted locally. Go for it I said. It was then that they pointed out I needed to look at the back ones too. "Don't want to change them just yet thanks - they were only put on recently."

"No, really" they said, "you need to look at them!" So I did - slicks!!! The part-worns with 5mm had done about 600 miles and completely worn away - and over half of that mileage was on the motorway! They must have been so old that the rubber had perished and the remaining tread just crumbled away...

Then they took off the fronts that I had been having issues with and in taking these off the rims to put their replacement ones on, they pulled me over to look at one of them which whilst using their machine to pull the tyre off, had exposed the metal structure beneath the tread because rather than the rubber flexing as it should under the machine, it had simply split!!!

So after a long discussion with the guy running the place I was at, he explained a bit about the part-worn tyre market. Turns out (if he's being straight and I tend to feel he was) that many of the part-worns coming to the UK from Europe are the worst available because the Europeans tend to keep the best for themselves. He, however, sources all his from much further afield and gets them in bulk from rental companies and fleets in other markets where they have to replace tyres on all their cars annually regardless of mileage. Certainly appears that way from the quality of the rubber on the tyres he's fitted on my car - which incidentally have completely resolved all its issues - I'm a happy driver again!!!

So in conclusion, if you do fancy buying part worns, do so carefully and be warned about the dangers to your health and your wallet of buying from just anyone. I'd buy from this guy again gladly, but I'd never just buy online again. If my fronts hadn't caused the issues to start this thread I'd imagine I'd have been looking at a rear blowout sometime in the next month or so or sliding off the road somewhere.

Confession over.

Paynewright

659 posts

77 months

Thursday 8th February 2018
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When I bought my 996 C2 I knew it needed tyres so was expecting them to be about £1k. Was pleasantly surprised when I got them for £622 all in at my local tyre place I’ve used for years. These are conti N rated in the slightly bigger sizes as a 2003 car.

Personally, I won’t compromise on tyres so would always buy new.

Ian

200Plus Club

10,752 posts

278 months

Thursday 8th February 2018
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Part worns on a 993 eeek.
Park her up and save up for some new Michelin sports tyres. And a proper alignment in case!

Slippydiff

14,826 posts

223 months

Thursday 8th February 2018
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Madness. Really not sure why you’d even consider using second hand tyres on a 170mph car, let alone one that’s known to have very specific handling “traits”.
Glad to hear you’ve got the problem sorted, but I’d have question the mentality of saving a few quid on the only thing that keeps your car stuck to the road.

Ocho

Original Poster:

604 posts

237 months

Thursday 8th February 2018
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Slippydiff said:
Madness. Really not sure why you’d even consider using second hand tyres on a 170mph car, let alone one that’s known to have very specific handling “traits”.
Glad to hear you’ve got the problem sorted, but I’d have question the mentality of saving a few quid on the only thing that keeps your car stuck to the road.
I knew I'd get slated and totally get what you're saying, but I don't drive it at 170mph for starters!

My other thought is that had I bought the car with 5/6mm of tread on N rated tyres then I wouldn't go out and replace them straight away. So if I can get tyres that have 5/6mm of tread and are N rated from a source (now!) that I trust then that's £400 of fuel or whatever else I want to spend it on.

n12maser

580 posts

92 months

Thursday 8th February 2018
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Assuming you need summer tyres, £600 for a brand new set of 17" Yokohoma AD08r + fitting from Black Circles. Prob can get even cheaper if you shop around. Best ££ you will ever spend on the car, trust me. Better and prob cheaper than Mich Pilot Sport 2. Pilot Sport 4 i can't comment on but image they're v pricey.

https://rennlist.com/forums/racing-and-drivers-edu...


boxsey

3,574 posts

210 months

Thursday 8th February 2018
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Ocho said:
I knew I'd get slated and totally get what you're saying, but I don't drive it at 170mph for starters!

My other thought is that had I bought the car with 5/6mm of tread on N rated tyres then I wouldn't go out and replace them straight away. So if I can get tyres that have 5/6mm of tread and are N rated from a source (now!) that I trust then that's £400 of fuel or whatever else I want to spend it on.
I'm struggling with your reasoning for buying part worn tyres. Above you say that it was £190 for a pair with 5/6 mm tread and it's £165 per tyre for a new one. The part worn ones will do about 4,000 miles before they need replacing (2/3 mm tread left). New ones will do about 8,000 miles before they get to the same level and need replacing. So that means the part worn pair is costing 4.75 pence per mile and a new pair is costing 4.125 pence per mile. Therefore the new ones are actually more cost effective and also win when it comes to peace of mind. As Slippy said the rubber is the most important factor that keeps you on the road.

Nb. For the sake of confusion I'm using the rear tyres for the wear rate calculations.


Edited by boxsey on Thursday 8th February 11:45

Moikey Fortune

1,650 posts

236 months

Thursday 8th February 2018
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Well first of all well done for coming clean

The fact you don't drive at 170 doesn't really count, you might have to stop quickly in the wet for some reason and your cheapo part worns disappear under you and man you would be toast plus anyone else you hit

Please don't compromise on tyres on any car let alone a high performance one

Which brings me on to my pet hate of people hoping prices will collapse or "correct" or whatever other bullst term is in vogue if you can't afford to buy the right parts, tyres, insurance or whatever and you have some "enthusiasts" work around to fix stuff then please just stick to dreaming until you can afford to run one of these cars properly

Thanks for listening hehe



200Plus Club

10,752 posts

278 months

Friday 9th February 2018
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Wandering is also badly affected by wear in the 993 suspension arms after 20yrs of service. Mine drive like a new car after COG sorted it with new dampers and bushes. That was on old p zero tyres Too, transformed the car. I then put pilot sports on after.
£2600 and 2 days at COG

SRT Hellcat

7,030 posts

217 months

Friday 9th February 2018
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Ocho your honesty is most impressive. But seriously get brand new rubber on there as soon as possible. You have no idea what sort of life the part warns have had. 30 years ago I used to put part warns on my series 1 XJ6 but I was seriously skint back then. Young stupid, invincible and fearless as a teenager

Ocho

Original Poster:

604 posts

237 months

Friday 9th February 2018
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Thanks SRT. Always thought honesty is the best policy.

I'm actually confident in the life these have had and it's a short one at that as they're 2017 tyres (date code on them) and having spoken at length to the dealer who has a large well set-up outfit I am at least as confident in them as I would be in tyres that came on a used car that could have been on there for years. Again, in such a case anything could have happened to them but I think we can agree 90% of us would leave tyres on a used car we'd bought if they're a quality brand and appear fine with good tread.

Suspension on mine has been fully redone with adjustable H&R all round so she's handling nicely now.

Thanks all.

EGTE

996 posts

182 months

Friday 9th February 2018
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Good life-lesson and well done for sharing.

At least you didn't go for remoulds - those are insanely dangerous and should be shut down.

watercooled

84 posts

112 months

Friday 9th February 2018
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Tyres detirorate not only by loosing thread depth, but also with age. Your reasoning (I'm not doing 170 anyway) indicates, that you're beyond help...

Good luck to you.