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Hot!3.2 TYRE ADVICE

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Raycobley
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2022/05/04 17:18:48 (permalink)

3.2 TYRE ADVICE

Any recommendations for tyre choice and availability please - size 205/55/16 & 225/50/16.
 
Currently being offered Michelin Exalto PE2's. (Pilot Sport not available in these sizes)

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sesame
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Re: 3.2 TYRE ADVICE 2022/05/04 17:31:02 (permalink)
Just had Porsche fit N0 PE2s fitted last week. Replacing our PEs that I was very happy with and hope the 2s are just as good. Last week the 'N' Yokohama's rears were very expensive and haven't tried them on the car so can't comment. Porsche fit Continentals I've used in the past are now not manufactured. When I've looked before Porsche fit tyres may not have been available due to limited and sporadic production runs. If you can get a set of PE2s fit them while you can. Our new tyres have dates on them from last year production around week 40 which I think is an acceptable age for new tyres. Steve
Raycobley
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Re: 3.2 TYRE ADVICE 2022/05/04 23:23:30 (permalink)
Hi Steve,
Thank you.
 
On another point I missed the latest zoom meeting but I was going to ask about the checking of oil.
I have always being a little apprehensive, but followed religiously the directions in the handbook, checking from cold.
I am told however that this procedure has moved on, and can lead to overfilling. I should be checking at tick over, on a level surface with the engine at normal operating temperatures.
 
Any thoughts I wonder?
T911UK
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Re: 3.2 TYRE ADVICE 2022/05/05 08:05:39 (permalink)
Car needs to be warmed right up, this can take 40 minutes, you need the stat fully open so the cooler is in play.
 
Go for a nice drive, leave for a few minutes then check on level ground with the engine running
 
Dont go over half way on the dipstick

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IndischRot
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Re: 3.2 TYRE ADVICE 2022/05/05 10:51:11 (permalink)
PS4s are readily available in those sizes but they're not Porsche approved. That said I don't really comprehend the N rating for Porsche tyres when the same tyre is approved for a 944 as for a 911 - the two cars have quite different driving dynamics and weight distributions.
Raycobley
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Re: 3.2 TYRE ADVICE 2022/05/07 09:43:14 (permalink)
Thanks for the advice, wonder how many 3.2 owners are following their handbooks as I have done for years? 
sesame
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Re: 3.2 TYRE ADVICE 2022/05/07 13:43:48 (permalink)
MORE ON OIL LEVELS
Hello Ray, I wasn't sure if you mentioned me just for thanks on tyres. If you wanted my advice on oil levels apologies for the late reply. Yes, we did mention levels on the Zoom as I had by chance been looking at that page in my Drivers Manual the previous day, it's a shame you missed the Zoom. In a similar vein to T911UK, Charles (our Tech Advisor) suggested checking the oil after having been out in the car. I tend to do this when we have been on a trip, just like I did when we got back from Donington Historic last weekend.
To confirm level checking, my 1988 version of the Drivers Manual states (abbreviated text)...
- Measure at idle - using dipstick (being careful not to catch anything lose in the moving fan and its drive belt)
- temperature dial needle at end of first white block, oil on dipstick mid way between min and max (min to max is 1.75 litres)
- temperature needle up at the next white line (that's before the temperature needle reaches half way on the dial) oil at max mark on dipstick at most
Personally, I like to keep the oil a little lower than this as even when I've been stuck in slow traffic for ages I've seen the oil level rise over the top white line and it gets a little scary! It's only my choice but if I had filled ours with the recommended extra half to 3/4 litre in the tank I don't know how high the level would have gone and what the consequences are. I assume the extra amount of heat expanded oil eventually gets drawn into the induction system resulting in clouds of oil smoke from the exhaust. Does anyone have experience of this?
Anyone reading this may wonder why it appears to be a bit complex to check the level on a 911 compared to many other cars. It comes down to being a 'dry sump' oil system and the fact that due to the thermal expansion coefficient property of the oil it will cause the volume to increase as the oil temperature rises. There is a lot of oil in these engines so the task of obtaining the right level can seem that you are trying to a hit a moving target! For those new to this it is soon mastered. Just don't worry about the oil level on the gauge disappearing when the revs are above tickover the oil level reading will reappear when the engine is back to ticking over again. Steve
post edited by sesame - 2022/05/07 16:26:30
sesame
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Re: 3.2 TYRE ADVICE 2022/05/07 16:49:56 (permalink)
Regarding the N rating on OE Porsche / Porsche homologated / Porsche fit (whatever you prefer to call them). I agree with IndischRot regarding the confusion of the same approval is given for rear and front engined cars with their different handling characteristics. However, I do prefer to stick with 'N' tyres as I have seen a cross section of the tyre at a trade stand. The build of the tyre is different and not just that a manufacturers standard tyre performs to Porsche's satisfaction. A Service Manager told me a story of a car that had been taken back to the main dealer with dangerous handling characteristics. I can't remember which way around it was but either an Aston Martin or a Porsche had one tyre from the opposite manufacturers Homologated Tyre list. The car had been gone over with a fine tooth comb to identify what could be giving the dangerous handling and it wasn't until the rogue tyre was spotted that the issue was fixed. They do then make a difference it seems. Steve
zulu
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Re: 3.2 TYRE ADVICE 2022/06/19 18:08:49 (permalink)
Hi Steve and Sue,
I need new tyres (front and rear due to age, not tread) and I was interested in your comments on the N rated brands available. So far, I've only found Michelin PE2 and 
Pirelli PZero Rosso and very expensive rear Yokohamas.
The handbook quotes F) 205/55 R) 245/45.
Only the Yokohamas are size R) 245/45 (fronts don't seem avaiable), while the others are F) 205/55 R)225/50.
 I think you have the same as me, a Supersport, which I understand from the handbook uses the same sizes as the 930 Turbo.
Is there any issue with the rears being nominally a different size to the handbook, which, if you're diligently trying to follow the manufacturer's N rating recommendations, seems to be pointless?
And are you happy with the PE2's? The Pirellis are quite a bit more expensive.
I'd be very grateful for your comments!
kind regards, and thanks,
Geoff
 
sesame
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Re: 3.2 TYRE ADVICE 2022/06/19 23:12:20 (permalink)
Hello Geoff, as mentioned, we have recently fitted the N PE2 Michelin and find they are working well. I wonder if there is someone that can advise on the profile difference and its effect as it could change the overall gearing / speedo accuracy? We don't have this issue as we don't have a Supersport and I haven't been asked this before and looked into the related tyre size options. If you don't get a reply here I suggest giving Michelin a call to check it out. Steve
zulu
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Re: 3.2 TYRE ADVICE 2022/06/19 23:27:34 (permalink)
Hello Steve - thanks for your quick response! Apologies - I was under the impression you had a Supersport with its hybrid underparts.
Good idea - I’ll ask the manufacturer directly.
Many thanks,
Geoff
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