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Today I had new Dunlop D02 Track Tyres fited to my Standard 18" wheels. Two weeks ago I had Pagid race pads added. So far so good and no real issues driving on the road, except comfort (mainly sound) issues.
As expected the brakes squeal. Sometimes its really loud. Like the loudest buss brakes you have ever heard!
And as expected the tyres hum quite substantially. This seems to be the only real drawback to having this set-up on the street. There is no point in having a Bose sounds system as there is so much background noise! Right now it doesn't bother me, as it reminds me that I am driving a tracking ready racing machine! I actually quite like it. But I reckon the novelty will wear off pretty quickly...
I didn't want to bear the expense of a second set of wheels at this point, so I am stuck with my track tyres for now. I can always switch back to the Michelins, but the wheels will need to be rebalanced etc.
I am looking forward to the track on Sunday. I'll report bacl on my first experiences with these tyres and brakes for those who are not yet fully fledged track junkies.
The rear track tyres with lower profile have a very noticable difference in diameter to PS2. I don't have PASM, so there is now a LOT more space between the tyre and wheel arch. I'll post a photo on the weekend. It actually looks a little strange.
I have only done 3-4 kms on the new tyres, so they are slippery at this stage when cold. I could swear the PSM is cutting in sooner, but its heard to say whether this is the tyres being cold or the difference in rolling diameter.
PASM - Porsche Active Suspension Management
This active damping system offers continuous adjustment of individual damping forces based on current road conditions and driving style.
The driver can choose from two setup modes, ‘Normal’ and ‘Sport’, using a separate ‘damper’ button on the center console. ‘Normal’ mode is designed for general road driving and circuits with uneven tarmac. ‘Sport’ mode is intended for smoother track surfaces, where the harder settings help eliminate pitch and roll.
In either mode, PASM continuously evaluates the current conditions while automatically selecting the corresponding damper rates from the respective set of mapped values.
A range of sensors are used to monitor the movement of the body under acceleration, braking and cornering maneuvers, as well as on poor road surfaces. The PASM control unit then evaluates this data and modifies the damping force on each individual wheel in accordance with the selected mode. The result is a significant reduction in body movement as well as a better grip on the road.
For example: if ‘Sport’ mode is selected, the suspension is automatically set to a harder damper rating. If the quality of the track surface falls below a certain threshold, the system immediately changes to a softer rating within the ‘Sport’ setup range. When the quality of the tarmac improves once more, PASM automatically returns to the original, harder rating.
Need more information about PASM? Click this link: FAQ for PASM
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.
what is the size of your rear tire? my 275 35 18 does not trigger psm. perhaps it b/c yours are still very new?
if you haven't, you NEED to change your brake fluid to ap, motul, ate blue or srf. do this BEFORE track day.
if your brakes squeal excessively, it generally means they aren't bedded in yet. pagid website has instruction on how to do it (i have my own method that makes you look like an idiot on the fwy but works, if want that method, pm me). once bedded in, the squeal becomes miniscule. it will come back after 3-4k miles of street driving, then you just bed them again.
have fun at your track day.
btw, yes, your car sh ould look like SUV ride height with the track tires due to size difference. when i was saw my with the RA1, i swear they messed up ;-) but it will drive fine.
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.
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Also, I would take it a little easy in your first run session, the tires need to be scrubbed-in a bit before they'll be at full prformance. New tires always have a residue on them that they put into the molds so the tire will release from the mold easily... it takes a good 100 miles of street driving to get that suff off - I'm sure it will come off faster on the track, but be careful at first.
brad
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21-year PCA Member
PCA DE Instructor
Thanks for the advice Beez. I was driving around a bit last night and I think PSM is fine. Definately if I brake very hard the brake squealing goes away for a little bit. Looking forward to tomorrow.
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.
Linear Mode
