cups

[Chappers]

What pressures are you running in Cup 2s? A mate with them on his Cayman GT4 has them at 1.9bar cold and has been recommended to run them around 2.4-2.5bar hot...

When my supersports finally run out (now at 17,000 miles including a trackday ) I'm going to get some in the specs I've been recommended and do some trials with them.

[Mike R]

Tried all different pressures, but they still perform like the R888s in that the operating window is vastly reduced compared to the original Cups.

[Chappers]

which tyres were overheating? Fronts, rears or both?

[Mike R]

Both - the whole car just starts to move around when they get hot. They work fine and then just start fall off a cliff. You then have to come in and let them cool, where they then recover.

It's just a pain in the arse on a track day, as it spoils the momentum. Just when you start to get into a groove, the car starts to slide and loose grip everywhere (in the same way as a normal road tyre does after a few hot laps) and you have to come in.

I think we were just spoiled with the Cups, as they were amazing. However, the Trofeo Rs perform in a similar way (but cost as much as Cup 1s did when they were expensive).

[shimmy]

Originally Posted by Mike R

Both - the whole car just starts to move around when they get hot. They work fine and then just start fall off a cliff. You then have to come in and let them cool, where they then recover.

It's just a pain in the arse on a track day, as it spoils the momentum. Just when you start to get into a groove, the car starts to slide and loose grip everywhere (in the same way as a normal road tyre does after a few hot laps) and you have to come in.

I think we were just spoiled with the Cups, as they were amazing. However, the Trofeo Rs perform in a similar way (but cost as much as Cup 1s did when they were expensive).

Ta

How much did you pay for the Trofeo R?

[Pooky]

Originally Posted by Mike R

Both - the whole car just starts to move around when they get hot. They work fine and then just start fall off a cliff. You then have to come in and let them cool, where they then recover.

It's just a pain in the arse on a track day, as it spoils the momentum. Just when you start to get into a groove, the car starts to slide and loose grip everywhere (in the same way as a normal road tyre does after a few hot laps) and you have to come in.

I think we were just spoiled with the Cups, as they were amazing. However, the Trofeo Rs perform in a similar way (but cost as much as Cup 1s did when they were expensive).

Honestly just don't don't buy this as fact given what I've learned from the tyre engineers at Michelin who developed them and original Cups. Fair enough I've not driven them on the CSL but I have on a number of other cars including my GT3 and they are just better at everything, and absolutely obliterate the Trofeo R in the wet. This may be your test result but that doesn't mean it applies to everyone.

They told me to use the Porsche spec tyre on the front of the CSL, and keep the pressures low from the start and not to let them get above 2.5 bar. But I never got the chance.

[shimmy]

Originally Posted by Pooky

Honestly just don't don't buy this as fact given what I've learned from the tyre engineers at Michelin who developed them and original Cups. Fair enough I've not driven them on the CSL but I have on a number of other cars including my GT3 and they are just better at everything, and absolutely obliterate the Trofeo R in the wet. This may be your test result but that doesn't mean it applies to everyone.

They told me to use the Porsche spec tyre on the front of the CSL, and keep the pressures low from the start and not to let them get above 2.5 bar. But I never got the chance.

wish it was true but tbh who cars about wet performance. It's all about dry performance, ability to stay usable and not go off on a 1400kg+ car are the only requirements.

[Mike R]

Originally Posted by Pooky

Honestly just don't don't buy this as fact given what I've learned from the tyre engineers at Michelin who developed them and original Cups. Fair enough I've not driven them on the CSL but I have on a number of other cars including my GT3 and they are just better at everything, and absolutely obliterate the Trofeo R in the wet. This may be your test result but that doesn't mean it applies to everyone.

They told me to use the Porsche spec tyre on the front of the CSL, and keep the pressures low from the start and not to let them get above 2.5 bar. But I never got the chance.

Try them and then comment :p .

I am used to Cups, so I tried the pressure settings for those (starting at 25-26 and maintaining them at 31/32) and I tried keeping them at a higher pressure (like you are supposed to with the R888s). Still the same, the grip falls away like the R888s - if anything it falls away quicker (as you would expect) if you try to run them at a higher pressure.

With no weight over the front axle, maybe the Porsche is kinder to the tyres, but they make a special compound rear (specifically for the the weight of the engine) for the Porsche, so the fact that the CSL uses the same front compound as the Porsche is probably half the problem. If they used one specially designed for the car (as the OE Cup 1s were), then maybe they could better deal with the weight over the front wheels like the original Cups could.

[Mike R]

Originally Posted by shimmy

Ta

How much did you pay for the Trofeo R?

£1300

[shimmy]

Originally Posted by Mike R

£1300

Fook

They had better be turbocharged

Dunlops are only £850