On Monday I went to a track day with a couple of mates in M3s, one with a LS3!
I knew the Michelin TB15’s wouldn’t last long with the heat so it was time to see them off, they have done 3000 miles including a track day at the Nurburgring. I’ll probably buy some narrower wheels for track days so I can run some cheaper track tyres.
The gearbox started to get a little tight after a few laps so I’ll look into fitting/developing a 915 cooler kit. Oh, I also need a diff badly!
I took the Group 4 to a circuitdays trackday at the Nürburgring last month. The car performed perfectly, I was a bit worried about the soft Michelin TB15 tyres but even with the great weather it didn’t cause much of an issue.
Prior to this trip I also fitted a turbo brake master cylinder, this along with the brake ducts from the Group 4 front bumper gave me plenty of confidence on the brakes.
I have the October trackday booked later this year, the only tweaks I might do is some siffer front springs as they are currently 125ft-lb.
We have started with the Cayman CS project. Over the next few weeks we will be fitting the upgrades to our Cayman to make it the ultimate fast-road Cayman - something we like to call Cayman CS.
We quickly threw one of our 917 style wooden gear knobs on and started on the performance upgrades.
A simple brake pad and fluid swap turned into a nightmare when the last bleed nipple sheared off. This required drilling out and tapping for a new bleed nipple. We fitted Ferodo DS2500 pads and flushed the system with AP Formula DOT 5.1 fluid.
Ferodo DS2500 pads
Sheared bleed nipple
New bleed nipple
Next was to address the power steering system. 987.1 Caymans do not have a power steering fluid cooler. When running prolonged high RPM, the power steering fluid is being pumped around the system more than normal which increases it's temperature. With the inadequate cooling this could cause a failure of the rubber power steering hoses. The simple fix is to fit a power steering fluid cooler in the low pressure circuit.
Rubber bobbins for cooler
Mocal cooler
Oil starvation is an issue on the M96 and M97 engines during hard cornering, especially with track tyres. We decided to fit a copy of the Porsche Motorsport X51 sump, it is slightly deeper which increases the engine oil capacity 0.6 litres.
Standard sump removed
Deeper sump
In the next update we will be fitted a third radiator and the suspension upgrade.
