Pirelli 285/645 Slick
Anyone know anything about this tire besides what you can easily look up on the net? Really just want to know how soft or durable a compound this is and its ideal temp range. Looks like there is a DS and a DH version?
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Pirelli uses this tire for World Challenge racing. They really don't publish much info b/c they don't want the general public using this product. I've heard it requires a fully adjustable suspension (and the right setup) to get the most out of either compound.
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These tyres are used in the Australian GT Championship in lower power cars (GT4 class) and they are not "generally available" over here - how you would go in the US I have no idea. |
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Yeah, I knew that they are the WC tires and I only asked cause I have a line on a couple sets of them for a good price at the moment.
Thanks Rangerz, will do. |
My input. I bought a set of scrubs from Brian Kleeman. They were used. I got one day out of them at Road Atlanta, but was 2.5 seconds quicker than on Hoosiers. Got my fastest time ever of 2:36 on them. I don't know which compound they were though. I would assume the softest.
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what do you think? safe to use? found this OP. there's 6 compounds of this tire http://www.pirelli.com/mediaObject/p...cuit_table.png |
Some entrants in our State Championship have used these tyres and our series runs typically 8-10 lap sprints rather than events lasting 30 minutes to 1 hour or 3 hour enduro's which is what the Audi and Porsche's get in the National GT championship..
They all universally say that these tyres give more outright grip BUT they take a minimum of 2 laps to come up to temp and pressure and are diabolical in the meantime (DM and DH compounds). Given that we only get three-quarters of a lap warm-up before a standing start, most guys using these tyres get swamped off the line and have to come back thru the field in the final 3 or 4 laps. If you want to use these on track days and/or sprints, then be aware of the time to bring them up to temp/pressure and you should enjoy the result, BUT they do not like a large number of heat cycles - they are heat cycled out after 5 or 6 heat cycles whereas an R-Spec might go 15 or 20 cycles. The other feedback is that they are grippy, grippy, grippy, grippy oh f4rk and you throw the car at the scenery .... not a lot of warning on the limit and you need to be quick to catch a break-away. The pros love them, amateurs are not so sure especially when getting them up to temp/pressure and right on the limit. Michelin and Pirelli are both represented at this weekends Bathurst 12-hour for GT's which could be a good watch if you are interested in GT racing ... details here: Bathurst 12 Hour and more here: GALLERY: Bathurst 12 Hour set-up - Speedcafe There is more on SpeedCafe.com as well .. the 12-hour site also has details of pod/webcast |
Got info from Derrick today. Real nice guy and was happy to talk to me about the tires. Basically the takeaway is that for longer session use (15 mins+), we definitely want to go with the DH compound. DM for a few time attack laps. DS would be ideal for autocross.
----- Great info, thanks BGTV8. I am always looking for the next GT race to stream! and on that topic, if you live in the US (I know your an Aussie BGTV8) and want to watch a IMSA Tudor race, use Hola and google chrome to make it look like your in a different country and you can view the stream, if thats the only way you can view it. |
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