johnsopa

Thinking of getting a CS. I do 15 - 30 track days per year depending on schedule. Mostly NJMP, VIR, Summit, Glen. No interest in racing anymore (did SCCA SRF years ago).

Over the last couple years, probably 80% of my track days were in my 991.1 GT3 and 20% in my Radical SR4 (basically an SR1). Sold the Radical last year.

For me, keeping track days as low maintenance as possible is good. I do all my own work but don't always have time.

Main thing that concerns me about going the CS route is slicks. I'd rather sacrifice a 2-4 seconds and get a ton of heat cycles on a 200TW tire vs only 2 days on slicks.

I know the suspension is setup for slicks, but I'm assuming it could be retuned for R comps or 100/200TW tires.

Anyone else doing this?

shizzle

There are a few teams running clubsports in WRL on 200TW tires. You just need to watch your tire circumferences so they stay in spec. Yokohama A052 seem to be the quickest tires that are made in the right sizes. Nankangs and Bridgestones also have good options.

johnsopa

Thanks, that's super helpful. Appreciate it.

jbaker136

My wife and I run the A052 and the RE-71RS in 265/35r18 and 295/35r18. We both love the A052. I think the RE-71RS is just as good but she hated them and so did our driving coach. The size listed above is in spec and the car will auto learn them fine. I will post a detailed table I put together on tire options for th 981 when I get a some time later.

Jeff

joemoc

Jeff,

Are you running the same alignment with the street tires or did you remove some camber? Just wondering how the car handled and the tires were wearing if you wanted to switch between the slicks and the street tires. Thanks.

38D

We run 200TW on a 981CS MR for endurance series. You need to soften the shocks and run way less camber than slicks. But the car is still very capable (1:27 at NJMP, 2:04 at the Glen). As noted, just make sure the tire circumferences are within the factory limits published in the manuals.

RobT 394

There are plenty of 200TW options. Yokohama, Pilot Sport Cup, Gforce and possibly Goodyear Supercar is now available (they were not when we were running WRL). Cooper's also fit but the rear is tall. Hoosiers are a good option as well. Consider this. The car is essentially a street Cayman. Lots of tire options other than slicks that will provide enjoyment at a lower cost. As others have said. It is all about the setup for the chosen tire.

Andy (Portland, OR)

Can someone provide the Hoosier R7 equivalent sizes and recommended alignment specs for that tire?

thanks, Andy

zedcat

I ran a set of R7 on a 718 Track day Clubsport in 245/40/18 and 295/40/18. Other sizes may work but these seemed closest to the slick options. I measured the circ and input to the Cosworth ICD and the car learned them with no issues. At the time I had neg 3.5deg front camber and neg 3.3 deg rear. Hoosier's document states they require "about 3 degrees neg camber". I didn't experiment with the set up. I think I did 8 heat cycles on them. After that I've mostly used the Hankook F200 in 250/640 and 300/680.

Daytona4RS

I also ran the Hoosier R7 245/40/18 and 295/40/18 on my 718CS. Unfortunately there just isn't a 275 tall enough so you end up having to stick with the slightly smaller 245. My personal opinion is I would rather go with 2-3HC scrub Michelin's or Pirelli's for DE. Still good for about 8-10 HC's if you go with the harder compound options. Hoosier pricing has gotten a bit out of control. I can easily get 15-20 HC's out of the Hoosiers on my e36. But for whatever reason the fall off just seemed more noticeable with the Clubsport. Closer to 4-6 HC’s before it started to bother me. Maybe just setup issues so not sure. I didn't spend much time developing the setup around the R7 on my CS.

carbondan

I was in the same boat when I transitioned from a 2018 street GT3 on cup 2 to a 991 cup on slicks, I had the same goals in mind. The reality was the slicks even when I was ready to junk them still had more grip than an almost fresh set of Cup 2s.
Look into the Hankook F200 slicks, that is what I run primarily. Excellent degradation over the course of 3-5 days. Pirellis were the worst. Michelins were the fastest and had the best feel but were double the price of Hankooks.

johnsopa

Nice, thanks for the feedback.

My inbound 981CS has Yokohamas (on the car and on spares) so I might give them a shot first depending on condition. The two race shops I visited also had Yokohamas on the cars on the shop. Maybe spec for some series?

carbondan

Funny, my second 991 cup I just bought a few weeks ago and have yet to drive came with Yokos installed, along with the special blue springs they require on the Cup. My coach who races GT4 and GT3 said he likes them a lot and had encouraged me to try them a few years ago.

BGA23

Where do you buy the F200s? Hankook Motorsports only has the C52 slicks, which are ~$2000 for a set.

***My bad, looks like C52 is just the medium compound of the F200.***

carbondan

^ Yep I buy straight from hankook motorsport website, they've always shipped within 24 hours for stuff listed as in stock.