Oh, and I won at Goodwood...
Another Cayman
- Thread starter ralphmusic
- Start date
For comparison at Thruxtonā¦.
Ralph,
An interesting read on your track day exploits. I would agree with your comments on the rear brake pad wear being attributed to PTV.
In my experience with a previous 718 2.5t GTS Cayman, using PDK with Sport Chrono and the PSM button pressed for two seconds activates Sport PSM. This will back off the intervention of the rear braking in PTV.
Great reporting. Keep it coming.
Brian
An interesting read on your track day exploits. I would agree with your comments on the rear brake pad wear being attributed to PTV.
In my experience with a previous 718 2.5t GTS Cayman, using PDK with Sport Chrono and the PSM button pressed for two seconds activates Sport PSM. This will back off the intervention of the rear braking in PTV.
Great reporting. Keep it coming.
Brian
Ralph,
Thanks for your updates ā¦ interesting reading as usual, and good to hear that Chrisās updates have sorted the problems you experienced on your first track day run-out. It sounds as though you now have a very well-balanced car.
Incidentally, my pre-PTV 987.2 also suffered from increased rear brake pad wear which initially rather caught me out until I figured out that it was due to PSM intervention.
Jeff
Thanks for your updates ā¦ interesting reading as usual, and good to hear that Chrisās updates have sorted the problems you experienced on your first track day run-out. It sounds as though you now have a very well-balanced car.
Incidentally, my pre-PTV 987.2 also suffered from increased rear brake pad wear which initially rather caught me out until I figured out that it was due to PSM intervention.
Jeff
AndrewCS said:Thank you Ralph, enjoyed the report - feedback
Re. Combe` - 1.17. ... is the target [], courtesy of Jason Plato in a manual 718 GT4
Andrew, I didnāt match Platoās time but almost had air OSF
Great photo Ralph, and proves the point that age has no detriment to pace and precision.
Keep on tracking.
Brian
Keep on tracking.
Brian
I have been having issues with "My Porsche" app and one of the apparent errors was counting down mileage to next service based on 20k mile service intervals. It turns out that the app is correct (i.e. 20k miles) and the Porsche website and documentation that show 12k miles are wrong.
All been confirmed by Porsche Germany... amazing, I wonder if many 718 GT4s have been serviced before it was really necessary?
All been confirmed by Porsche Germany... amazing, I wonder if many 718 GT4s have been serviced before it was really necessary?
Pick up from one front tyre after Silverstone GP day where a number of cars were running slicks. Driving 200 miles home didnāt clean them up. Oddly the rears werenāt affected.
Andrew,
It is odd since on a brake cleaning session post Thruxton (I always clear the drilled holes after each track day) there was a lot of debris in the rear discs that I thought was the pad breaking up, but which now looks like the famous OPR.
By mid afternoon at Silverstone the car felt as if the tyres were under pressure or a wheel balance weight had dropped off and grip was reduced.
Anyway Iām back to Thruxton at the end of the month so maybe Iāll come home with clean tyres but OPR in the rear discs - itās a funny old world.
BTW, looking at your ābeforeā rear toe I wondered if on your track day at Knockhill whether the rear was unstable under braking.
Ralph
It is odd since on a brake cleaning session post Thruxton (I always clear the drilled holes after each track day) there was a lot of debris in the rear discs that I thought was the pad breaking up, but which now looks like the famous OPR.
By mid afternoon at Silverstone the car felt as if the tyres were under pressure or a wheel balance weight had dropped off and grip was reduced.
Anyway Iām back to Thruxton at the end of the month so maybe Iāll come home with clean tyres but OPR in the rear discs - itās a funny old world.
BTW, looking at your ābeforeā rear toe I wondered if on your track day at Knockhill whether the rear was unstable under braking.
Ralph
AndrewCS
Active member
Hello Ralph
Thanks for the update - info
Knockhill was on PS4S tyres - the car was pretty steady everywhere, the two big braking areas - on the flat into the uphill hairpin and slightly downhill at the end of the start / finish straight did see some slight `movement`, not what I would consider instability though and nothing to affect the turn in. I was braking to the point of `almost` locking up / sliding the front slightly
It has been five years since I`d been on a track hence the butt and balls may have needed some `calibration`, however ... running out regularly but slower over the Highlands the rear has always been well behaved under heavy braking
Thanks for the update - info
Knockhill was on PS4S tyres - the car was pretty steady everywhere, the two big braking areas - on the flat into the uphill hairpin and slightly downhill at the end of the start / finish straight did see some slight `movement`, not what I would consider instability though and nothing to affect the turn in. I was braking to the point of `almost` locking up / sliding the front slightly
It has been five years since I`d been on a track hence the butt and balls may have needed some `calibration`, however ... running out regularly but slower
over the Highlands the rear has always been well behaved under heavy braking
Jeff,
The OPR pictured above was from the front off-side (Silverstone overtaking is on the left), the near-side front had much less as below:
Lesson, or rather a reminder to self is to leave just a carās width + a bit for faster cars, not go so far off line so as to collect marbles.
The OPR pictured above was from the front off-side (Silverstone overtaking is on the left), the near-side front had much less as below:
Lesson, or rather a reminder to self is to leave just a carās width + a bit for faster cars, not go so far off line so as to collect marbles.
OliR
New member
Hey Ralph, as someone who's considering going the other way, 718 GT4 to 991.2 GT3, now you've had a bit more time and experience with the car, hows it comparing? Is there anything you miss about the old car, and does the GT4 do anything better?
I've driven both but not had the chance to drive the GT3 in anywhere near the same depth as my GT4, obviously.
I've driven both but not had the chance to drive the GT3 in anywhere near the same depth as my GT4, obviously.
OliR said:
I only use my Porsches on track so the big difference for me was the ability to get on the power earlier on corner exit in the GT3, a result of better rear suspension layout. Oh, and the GT3ās engine is more of an event and more helpful in getting past quick cars on Hanger Straight.
My cars are set-up for 90% track 10% road and in this state the GT3 was far more of a handful on undulating roads than the two similarly set-up GT4s - you can see my set-ups in my GT3 thread and the one on my first my GT4 - I guess there was more camber on the GT3 as it is less constrained by rear toe components - none of the cars tramlined.
Practical point, I missed the rear luggage area in the GT4 and found stowing stuff behind the seats in my non-cage GT3 a PITA, but one has to suffer at times..
One can over analyse what are emotional decisions, just do it.. I sold mine mainly for growing insurance concerns on my part and being offered a quick delivery GT4 slot out of the blue.
Hi Ralph,
I've just read your article in the latest Porsche Post under the "Modified" Register section. You mention your car, with JCR silencing tips, blows between 90 and 94 dB. My car, with Ninemeister silencer blows 90-91dB at Oulton Park which is no different to OliR's completely standard car.
Are your figures correct? Or is is there something not quite right with your JCR tips?
I've just read your article in the latest Porsche Post under the "Modified" Register section. You mention your car, with JCR silencing tips, blows between 90 and 94 dB. My car, with Ninemeister silencer blows 90-91dB at Oulton Park which is no different to OliR's completely standard car.
Are your figures correct? Or is is there something not quite right with your JCR tips?
I think if you replace āblowsā with ātested asā and recognise the number of days I do at different tracks with varying measurement conditions and tester attitude, my experiences might make more sense. One 90dB day at Thruxton itās ānot really Sirā, next time itās āOK but weāll monitor your noiseā
Given I run at noise limited tracks and on days with lower noise levels than Club days, they do make a difference in being able to run freely without either having to lift off/short shift.
Perhaps youād like to contribute an article in Modified Register PP on your car (I do have another 2 monthās material in draft). We did one on Chrisās GT4 so there is precedent for featuring a Memberās Cayman. Drop me a PM if you are interested.
Given I run at noise limited tracks and on days with lower noise levels than Club days, they do make a difference in being able to run freely without either having to lift off/short shift.
Perhaps youād like to contribute an article in Modified Register PP on your car (I do have another 2 monthās material in draft). We did one on Chrisās GT4 so there is precedent for featuring a Memberās Cayman. Drop me a PM if you are interested.
I was just commenting based on my own (albeit limited) experience and the dB numbers you quoted from yours. I appreciate it may be different for drive-bys, but as you were talking about static tests only it appears that the tips make no difference. I think this may be true as the noise meter will always be placed near the exhaust exits...
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