964RS which track tyres

[CarreraLightweightRacing]

A good friend of mine has recently switched from Toyo R888's to CUP 2's but is really not getting on with them, particularly on turn in. Anyone else had similar issue with CUP 2's with a 64RS? I said I would pose the question here on his behalf (he is German).

[Steve Rance]

I run Cup 2's on my 64. They are fine on the road but on the circuit go off reasonably quickly and need to cool down to come back in. Reasonably quick though. Is your buddy getting understeer on the circuit? If so what circumstances ie where in the corner and what type of corner?

[CarreraLightweightRacing]

Hi Steve, knew I could depend on you for guidance
He only really uses the car at the NBR GP circuit, SPA and Hockenheim. I advised him to try CUP 2's and he really isn't happy with them compared to his previous R888's. What he basically told me is that it understeers. He is now away on holiday on Sylt so I cant get any further details just yet. All geo settings are identical to previous, just the CUP 2's don't inspire the confidence the previous tyres did.

[964RS.]

I made the same change with my 964 Cup.

I expected great things of the Cup 2's. They are great straight out of the pit lane. They rapidly rise in pressure and require a lot of correction to get to the ideal setting. However when they go - they go dramatically - like falling off the proverbial cliff. The issue is not the pressure but the temperature. Admittedly it was after a good few laps at Spa Francorchamps. Checked the pressure and that was okay but the temperature was too high. Off course they then started to collect 'marbles' off the track and this exacerbates the problems.

The Toyo R888's are more progressive. They are still available through the distributor in the Netherlands. I bought some recently and they were reasonably priced.

I've tried Bridgestone SO2's previously and they were poor.

I've tried Goodyear Eagle F1's for reference. No use whatsoever.

Fuldas in the distant past - No use whatsoever.

He should go back to the R888's.


CheeRS!

Edited by 964RS. on Monday 26th September 10:08

[Steve Rance]

Generally I get tyres up to temperature in 3 or 4 laps rom cold. As just said, the Cup 2's keep creeping up and i'm still bleeding off after another few laps which is a pain. Reasonably quick for about 15 mins then they start to go off and you may as well come in. We had exactly the same characteristics with the 888 on the GT3.

They are not a bad tyre and when in the sweet spot a little quicker that the Cup 1 but ultimately nowhere near as consistant through wear and heat cycles.

[rubystone]

My RS came with A008s. Superb tyres. Shame they discontinued them about 15 years ago!

[Cunno]

Get same issue on 997.1 GT3, still think the original cup is a better track tyre. I'm a big fan of the people irelli trofeo R they are a lot easier to set up on track and out perform the cup 2 in all areas apart from standing water. Shame about the price.