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The first thing they will do is to take you around the track, stopping at every major corners and explaining the lines to take etc. All beginners should go on this quick familiarisation. Then look out for Matt Coleman. He is a Carrera Cup driver and some time V8 Supercar driver.I would say that he is probably one of the best instructor there. I have done the O'Neil day many times andI think it is a great day for first timers, yet isalso benefial for track regulars as those racing drivers can always find something to help you with. Very soon, you will feel comfortable and start pushing more. Be careful at the end of the back straight. I find that my Boxster S floats a bit there when I try to hug the apex and the five cones. Just brake a bit earlier initially until you are familiar with it. Other than that, the rest of the track is pretty easy to learn. Just be safe and enjoy yourself, and say hello to Luke and Matt for me. [img]/fckeditor/editor/images/smiley/MWPX/thumbsup.gif[/img]
I had a great day, and met a friend of yours in a Boxster S.
But now I am confused about tyre pressure. The guys said add 5 psi for the track. I did this so I had 37 for the front and 42 for the rear (5 psi over Porsche recommendations for COLD tyres). But when I checked pressure on the hot tyres, the rear pressure was up just over 50. I spoke to a Michellin guy, who said it should be more like 40 hot. So I let out some air so that they were 44psi (rear) when hot. So know I think I actually have less pressure than Porsche recommends. And even though my driving improved out of sight over the day, my fastest laps were the first few. Later in the day I was like 15 seconds slower? Go figure... At this point I was much more confident, had PSM turned off and was definately driving much smoother.
So I don't know whats going on?
Does any one know the deal on tyre pressure with Michellin Pilot Sports with 18" rims?
Can't wait for another track day....
Luke Youlden (Bathurst driver and last years Carrera Cup Rookie of the year) took me round for a few hot laps which was a blast. He did about 1 min 28 (according to my video) which is not bad for a Cayman S, considering that he had a passenger and wasn't at full pace.
PSM - Porsche Stability Management
While it can’t overcome the laws of physics, the revolutionary Porsche Stability Management (PSM) system does lend an added degree of balance and control to the Cayman’s mid-engine driving dynamics, inspiring surefooted confidence in corners and extreme situations.
A standard feature on the Cayman and Cayman S, PSM continuously monitors steering input, road speed, yaw velocity and lateral acceleration to calculate the actual direction of travel. If the car begins to steer off line, PSM instantly intervenes with precision brake inputs on individual wheels to help bring the car back onto the driver’s intended path.
If braking alone isn’t enough to correct the vehicle’s cornering line, PSM then calls on the Cayman’s engine management system, adjusting engine output as needed to help stabilize handling. PSM can also compensate in an instant for mid-corner changes in load resulting from deceleration or braking. When Sport mode is selected with the optional Sport Chrono Package, PSM’s threshold for intervention is raised, allowing for greater driver involvement. If you prefer driving without automatic PSM assistance, the system can be set to standby at any time. In this case, it will only intervene under heavy braking, where both front wheels exceed the ABS threshold.
For all of its technical ability, PSM goes virtually unnoticed in everyday driving situations, preserving the Cayman’s natural agility.
I wouldn't listen to the Michelin boys...that sounds a bit silly but I never took their advice. I also found that having it 5 psi difference between front and back is a bit too much understeer in my Boxster S, and I usually have it about 2psi difference. Be warn though if you are not an experience driver this could be a handful. What you should do is to play around with the pressure all throughout the day until you find one that you are happy with. Btw, the guy you met is my best friend. I am trying to convince him to get a Cayman together but he wants to eventually geta Carrera and may skip the intermediate step of a Cayman. And the1:28 Luke did was a very good time if he wasn't pushing. Good to see! So where are the videos? Send us a link! [img]/fckeditor/editor/images/smiley/MWPX/tounge_smile.gif[/img]
Wayne, thatnks for the info. Wouldn't less pressure in the front (as opposed to rear) actually increase grip in the front and reduce understeer?
I'll try to get some video online in the next few days. What sort of times do Boxster S do around Sandown?
I am booked in for a John Bowe Day at Winton in July. I also plan to do the next Events Oneil day at Sandown. I am well and truly hooked. Although I am not sure I can afford to be hooked! I want a short shifter after checking out your friends... P.S. I missed his name. can you message me his details?
This is where I become really confused. The plate on the car suggests 32 PSI for front tyres, and 37 PSI for rear tyres. I am assuming that this is cold, or only as warm as normal driving in traffic would be (which is not very warm). The people from the track day I went on suggested that for the higher speeds of the track, everybody should add 5psi above the manufacturers recommendations. The people from the next high performance I have enrolled in have suggested that tyres for the track should be 8-10 PSI above manufacturers specs for the track.
So I went with 5 psi more, giving me 37 and 42 normal driving temp. After 6 hard laps, the tyres were smoking and rear pressure was 50psi. The Michellin guy at the track also said that around 38-40 hot was the go. But this means letting air air of the tyres from stock set-up. Everything I have read online says the faster your speed the more pressure you need to keep the sidewalls stable and the car safe.
So now I am totally confused.... perhaps I should just stick with stock set-up and leave the tyres alone?
I found a MIchelin PS2 PDF that suggests that you should increase pressure above manufacturers recommendations if driving over 160kmph. There is a sliding scale that recommends adding 1 psi if driving to 170 max upto an extra 5 psi when driving upto 210 PSI. It also says that tyre pressures should be checked cold for accuracy. But the max PSI is 50 for this tyre. So if you follow these recommendations and then up with more than 50 PSI for hot tyres what happens then?
I think I am going to go with about 35 and 39 cold and leave it at that. But check pressures again next time when hot to make sure they are not off the scale. So a few PSI over recommendations...
At Sandown I get upto about 210 on the back straight and 200 on the front straight.
Increasing the tyre pressures for high speed is only applicable if you plan to drive at that speed for a long time. On track that is unlikely to be an issue.
I just checked my pressure cold. Fronts are down to 28 PSI, rears 33 PSI. So I must have let too much air out when they were hot trying to get them to 38 and 44.
LIsten to the Michelin guy, 38/40 hot. After your are done driving at the track and they cool off, you will need to inflate them back to the normal pressures.
I assure you, anything over 40 hot will yield very poor traction. The tire will be over inflated and you'll be driving on a tire that is slightly bulging so you will not be running on all the tread; just the center which is bulging due to too much pressure.
The instructions for adding pressure for high speed driving is not applicable for typical track driving; it is for driving at high speeds for susptained periods of time; like when driving long distance on the Autobahn.
Edited by - sleepless on 05/19/2006 7:46:52 PM
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97 Turbo | 06 Boxster S | 06 Cayman S (sold)
This is strange, becuase letting out 5 psi for a track day rather than adding 5 psi goes against the advice of both the John Bowe driving school and the Events Oneil instructors. They claim that for high speed track driving you need more pressure to provide the tyre with more sidewall stability for the extra forces on the track. I have asked my dealer to ask the local Porsche motorsport guys what they think... I'll let you know what they say.
To end end up with 38 hot means dumping 10 pis from the cold tyre pressure. But then my brother reckons that with his Ducati 749 on the track he needs to add pressure to reduce heat, becuase if the tyres are underinflated they result in more friction and therefore more heat and pressure. its all quite confusing... I am doing a track day with John Bowe school soon, so I will also ask John Bowe if he is there, as he is about as experienced Motorsport person as there is in Australia.
I have upload a video to Google videos, of a lap with Luke at the wheel. Its worth checking out. However there was some luggage net over the top of the lens and the video has been squashed bu Google as its in widescreen format natively....
Good video Dave! [img]/fckeditor/editor/images/smiley/MWPX/thumbsup.gif[/img] Yeah Luke doesn't look like he was attacking the track. I reckon he has anothertwo to three secondsin it still. Btw, my faster sandown lap is high 1:29's.
