Stokepotter Posted June 25, 2016 Share Posted June 25, 2016 Guys, according to the on line guides the Tyre pressures for the 18" wheels are front 29 rear 36. My Tyre monitors indicate they are currently 34 and 36 and feel fine. Can anyone confirm the 29/36 pressures are indeed correct and how accurate is the car monitoring system? Link to comment Share on other sites More sharing options...
bcr5784 Posted June 25, 2016 Share Posted June 25, 2016 I assume we are talking 981. My handbook says 29psi front and rear. Link to comment Share on other sites More sharing options...
Founder Beanoir™ Posted June 25, 2016 Founder Share Posted June 25, 2016 (edited) 987, so on the inside of your door is a plate with the tyre pressures on, for 18" wheels (standard tyre sizes) its F30/R37psi I really wouldn't rely on the tyre monitoring system, check your tyres pressure before you drive it (cold) and with a decent pressure gauge, it's worth investing a few quid on one IMO. Edited June 25, 2016 by Beanoir Link to comment Share on other sites More sharing options...
Stokepotter Posted June 25, 2016 Author Share Posted June 25, 2016 Cheers beanoir, I will get them adjusted tomorrow. Link to comment Share on other sites More sharing options...
twopointnine Posted June 26, 2016 Share Posted June 26, 2016 For comparison here is a photograph of the plate inside the door of my 987.2 Cayman.... Link to comment Share on other sites More sharing options...
Stokepotter Posted June 26, 2016 Author Share Posted June 26, 2016 My plate is missing but now I'm confused is it 30/37 or 30/31 and how come the difference? Mine is a 2012 base 987. Link to comment Share on other sites More sharing options...
bcr5784 Posted June 26, 2016 Share Posted June 26, 2016 Strange that the tyre pressure recommendations for the 987 and 981 should differ so much - and apparently the 718 is different again. Suggests perhaps (within limits) there is scope to tweak them for the best compromise for yourself. 1 Link to comment Share on other sites More sharing options...
Stokepotter Posted June 26, 2016 Author Share Posted June 26, 2016 Yeah, it would seem so, I've also checked kwik fits on line pressure check where you type in your reg, just to cloud things further still, that quotes 29/36! I've settled for 30/37. Link to comment Share on other sites More sharing options...
DJMC Posted June 26, 2016 Share Posted June 26, 2016 On the subject... just happened to check mine a week ago and n/s rear down to 1.2 BAR from 2.3 BAR. Long piece of ali rod was the culprit. £10 to repair. But... I hadn't noticed, either visually or from driving, that there was a big deflation. Moral: Check tyres, especially low profile ones (20"), more regularly than you think you should! Link to comment Share on other sites More sharing options...
bcr5784 Posted June 26, 2016 Share Posted June 26, 2016 It was the fear of such an incident, wrecking a tyre and possibly a wheel that led me to fit tyre pressure monitors. Only 70 quid or so on ebay and work very well. The receiver plugs in the 12v socket in the glove box and beeps with over temp or low pressure. Link to comment Share on other sites More sharing options...
DJMC Posted June 27, 2016 Share Posted June 27, 2016 (edited) 18 hours ago, bcr5784 said: It was the fear of such an incident, wrecking a tyre and possibly a wheel that led me to fit tyre pressure monitors. Only 70 quid or so on ebay and work very well. The receiver plugs in the 12v socket in the glove box and beeps with over temp or low pressure. I just missed those being standard, in Sept '14 I think. Could you put up a link to the ones you bought please? Anyone tried the little coloured caps, like these?: http://www.ebay.co.uk/itm/4-x-Tyre-pressure-monitor-gauge-BUY-2-SETS-GET-I-FREE-36-psi-/142015841260?hash=item2110cdc3ec:g:zaoAAOSw9eVXVEuc Edited June 27, 2016 by DJMC Link to comment Share on other sites More sharing options...
bcr5784 Posted June 27, 2016 Share Posted June 27, 2016 I bought these - not the last word in elegance but I was reluctant to spend the money on getting the equivalent ones that fit in the wheel without knowing how well they would work. http://www.ebay.co.uk/itm/NEW-SPY-LP506-TPMS-Tire-Pressure-Monitor-Transmitter-Sensor-Wireless-4-pcs-/161772688202?hash=item25aa67534a:g:gxkAAOSwLVZVsfXM These work well once set up - which could be easier. Note if you are fitting external ones you should add a 10gm lead weight on the opposite side of the wheel to maintain wheel balance Were I doing it again I'd fit these http://www.ebay.co.uk/itm/SPY-Wireless-Car-TPMS-Tyre-Pressure-Monitoring-System-With-4-Internal-Sensors-/252238597352?hash=item3aba978ce8:g:6fIAAOSwT~9Wi4if Link to comment Share on other sites More sharing options...
Stokepotter Posted June 27, 2016 Author Share Posted June 27, 2016 So I am now getting paranoid, I inflated using my portable plug in device to 37/30, checked the on board monitor today which now reads 34/34 and 29/26! I think it was although must admit, this was whilst driving, I will try and remember to check before I set off in the morning. Anyway, this got me round to thinking about something I have never, ever owned, a dedicated and accurate Tyre pressure gauge! Just had a quick look on eBay with prices ranging from a few quid to £20 plus. Anyone got any recommendations or links for a decent one? Link to comment Share on other sites More sharing options...
PhilCS Posted June 27, 2016 Share Posted June 27, 2016 As mentioned a few posts up, a decent tyre pressure gauge is a must in any Petrolhead's garage - they don't cost a lot but the gauge built into electric pumps, petrol station pumps and the TPMS shouldn't be trusted fully. This is a decent brand and costs £12 it's all you'll need. https://www.toolstoday.co.uk/sealey-tyre-pressure-gauge-with-clip-on-chuck?gclid=Cj0KEQjwncO7BRC06snzrdSJyKEBEiQAsUaRjO1ecXBR9XYNrDkWpPDtKUTggANt5lZN336vafmV4ukaAh-_8P8HAQ Link to comment Share on other sites More sharing options...
Stokepotter Posted June 27, 2016 Author Share Posted June 27, 2016 Thanks for that Phil, looks just the job, I have also been looking at the Michelin digital one which I would assume, given the company who've put there name to it, is half decent. Link to comment Share on other sites More sharing options...
twopointnine Posted June 27, 2016 Share Posted June 27, 2016 As long as the gauge you use is of good quality and can reliably repeat the results then personally I think as long as the pressures for each 'axle' match then it will not matter if you set them a couple or so psi different to the recommended settings. I usually set my tyre pressures with the tyres cold. Also, I guess that the chart Beanoir showed was for a 2011 Cayman R whereas the plate I showed was for a 2009 Cayman (not an S) although the tyre sizes for 18" rims are the same. It may help if someone with a 2011 Cayman S could show us their plate. Link to comment Share on other sites More sharing options...
croccroc Posted April 15, 2017 Share Posted April 15, 2017 On 26/6/2016 at 13:05, twopointnine said: For comparison here is a photograph of the plate inside the door of my 987.2 Cayman.... for whatever it's worth, here are some data for the 718 2017 Cayman Link to comment Share on other sites More sharing options...
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