R35 > Road Tyres > 250km/hr Vmax

[LSX-438]

Well Superlap Clubsprint has been run and won (By Nick Kalis in his Evo) with myself runner up in the R35. A couple of weeks back i ran a 1:40.19 at EC with slicks and AM Wing installed, so it was a bit of a mystery how we would go with the Advan AD08 285/30/18's. I had high hopes but it was not to be unfortunately. I ended up running a 1:44.8 in practice on thursday, following up with a 1:45.00 on Friday, and was not able to get back to that time thereafter. So there you have it, slicks vs road tyres about five seconds defference! Not good enough and with Nick surprising everyone with a 1:44.3 he smashed us all. Congrats Nick.

I would post up some video but it's just disgusting & messy, i would say even dangerous with such road tyres. Never again. Another issue with these tyres: they are a whopping 80mm shorter vs the stocker 20's, so whilst the 295/35's and 68 slicks work well, these ad08's at 630mm tall had "issues". Anyone thinking of running these on an R35 - don't bother (not that you ever would, except perhaps in such an event). VDC does not cope well with tyres less than 340mm tall it seems, and had to be turned off completely. Normally we would turn VDC off for a lap time, but i think it would have helped in such a low grip situation. Anyway excuses, excuses!

Big thankyou to Prestige Morotsport / DRGTR.COM.AU for their sponsorship during this event.

Special mention to Martin @ Willall who supported me (albeit remotely) during the three days of practice and both days of superlap. When i mentioned the tyre problem Martin had two new tunes sent out to me within 15 minutes (trying different power application techniques). Many thanks Martin, much appreciated. Also managed to fit Willall's new splitter the day before practice (see below) i will post up decent pics and install thread soon. This thing installs easily and is extremely robust and exceptional value. Unfortunately given the pathetic grip of the road tyres i was not really in a position to take advantage of any aero (i was not able to run my AM wing either, due to it being mounted on a carbon boot).

On the last session (on the bridgestones) i got greedy and ran for a few more laps than i should have, this was the result:

Overall it was a good experience, i think driving on road tyres has ultimately served as good training. I dont think i will be doing a road tyre event again in this car though; the car is capable of so much more, and it's much more fun on r's or slicks.

Edited May 25, 2010 by LSX-438

[fungoolie]

Think it's time to fit Willall's waterspray kit Duncan!

[Snowman]

Duncan - if you are going to be serious about this event next year can I suggest a new set of Dunlops for you.

At Phillip Island we have seen close to 5s / lap difference between an old set of Bridgestones (which I understand you tried) and a new set of the factory dunlops. (1.46 on new dunlops - 1.51 on old bridgestones). We all know there could be many other factors that could be the reason for that big difference but there is no doubt that the Dunlops are the best road tyre going around for these cars on a track.

[Martin Donnon]

That is an amazing display of brake burning

The brakes on these cars need additional cooling at your pace Dunc

[LSX-438]

Duncan - if you are going to be serious about this event next year can I suggest a new set of Dunlops for you.

At Phillip Island we have seen close to 5s / lap difference between an old set of Bridgestones (which I understand you tried) and a new set of the factory dunlops. (1.46 on new dunlops - 1.51 on old bridgestones). We all know there could be many other factors that could be the reason for that big difference but there is no doubt that the Dunlops are the best road tyre going around for these cars on a track.

Wow, i should have been on the new dunlops

damn

[GT-Ricer]

Well Superlap Clubsprint has been run and won (By Nick Kalis in his Evo) with myself runner up in the R35. A couple of weeks back i ran a 1:40.19 at EC with slicks and AM Wing installed, so it was a bit of a mystery how we would go with the Advan AD08 285/30/18's. I had high hopes but it was not to be unfortunately. I ended up running a 1:44.8 in practice on thursday, following up with a 1:45.00 on Friday, and was not able to get back to that time thereafter. So there you have it, slicks vs road tyres about five seconds defference! Not good enough and with Nick surprising everyone with a 1:44.3 he smashed us all. Congrats Nick.

I would post up some video but it's just disgusting & messy, i would say even dangerous with such road tyres. Never again. Another issue with these tyres: they are a whopping 80mm shorter vs the stocker 20's, so whilst the 295/35's and 68 slicks work well, these ad08's at 630mm tall had "issues". Anyone thinking of running these on an R35 - don't bother (not that you ever would, except perhaps in such an event). VDC does not cope well with tyres less than 340mm tall it seems, and had to be turned off completely. Normally we would turn VDC off for a lap time, but i think it would have helped in such a low grip situation. Anyway excuses, excuses!

Big thankyou to Prestige Morotsport / DRGTR.COM.AU for their sponsorship during this event.

Special mention to Martin @ Willall who supported me (albeit remotely) during the three days of practice and both days of superlap. When i mentioned the tyre problem Martin had two new tunes sent out to me within 15 minutes (trying different power application techniques). Many thanks Martin, much appreciated. Also managed to fit Willall's new splitter the day before practice (see below) i will post up decent pics and install thread soon. This thing installs easily and is extremely robust and exceptional value. Unfortunately given the pathetic grip of the road tyres i was not really in a position to take advantage of any aero (i was not able to run my AM wing either, due to it being mounted on a carbon boot).

On the last session (on the bridgestones) i got greedy and ran for a few more laps than i should have, this was the result:

Overall it was a good experience, i think driving on road tyres has ultimately served as good training. I dont think i will be doing a road tyre event again in this car though; the car is capable of so much more, and it's much more fun on r's or slicks.

If your speedo indicated 250kph on 630mm wheels, it is actually only 221kph on 712 mm stock wheels for which the speedo is calibrated.

My totally stock car does 243kph at 100m mark before Turn1 at EC.

Your car should be good for 250kph+ on stock 20" tyres or 285kph on those 18" skateboard wheels...LOL

[LSX-438]

If your speedo indicated 250kph on 630mm wheels, it is actually only 221kph on 712 mm stock wheels for which the speedo is calibrated.

My totally stock car does 243kph at 100m mark before Turn1 at EC.

Your car should be good for 250kph+ on stock 20" tyres or 285kph on those 18" skateboard wheels...LOL

250km/hr as indicated on the vbox data. No way i would get to 285km/hr at EC, even on 630mm OD tyres