What does getting beat by DS have to do with it? CS has beat BS in more than a few occasions, and that's with the National Champion in BS (no offense). Further, the DS driver you're mentioning is actually the National Champ, and the AS driver was second at Nats. I've seen DS beat CS on a few occasions where the course has lots of fast (50-65 mph) transitions (ITR vs Miata). So if CS>BS and DS >CS, then DS>BS (not likely, but it's possible). Holy cow, I haven't used association in forever... hahaha.

Only real valid data point is if someone has a test and tune with both tires and is generous to let us all know. Both sizes wouldn't hurt too. Bueller? Bueller?

 

I would like you to find me a set of results from any event with top level drivers in both classes and when weather was not an issue where DS beat CS. Not going to happen.

Most of the time I would not use natls results but in this case AS, BS and DS all ran within a heat of each other and on the same days.

AS 101.697
Steve 102.202

BS 102.396

DS 105.854

With the low grip surface the C4s power could not be fully used, with more grip AS would have been faster.

Sorry if you get beat heads up in the same conditions by a DS car you are off the pace.

p.s. CS ran thurs-fri after more rubber was on the track and also ran a 101.697.

 

p.s. BS ran 2nd, West-East and AS ran 5th East-West last year.

Other than that, yeah. CS has beaten BS and DS has beaten CS, but can anyone point to an event with drivers worth comparing in developed cars where DS beat BS (weather or conditions notwithstanding)?

 

You are right... I thought they were right after us on the other course because I watched them, but they ran after BSL not BS. So they had an even better track.

It is always hard and most of the time useless to compare one class of cars to another, that is why cars are in different classes. However with DS VS AS/BS/CS you get to a point where the vehicle dynamics are so different that with equal drivers you will not see DS beat the others in the same conditions.

 

I never said DS beat BS. But like Clyde reaffirmed, DS>CS and CS>BS, so theoretically it's possible. I think DS can be faster than it is now, but no one wants to spend the money to buy the "right" car. It's a long shot, but I've seen weirder things happen at autox.

 

When DS beats CS, BS usually runs away from DS. When CS beats BS, it usually runs even further away from DS. The logic that you want or assume to be there to support your conclusion doesn't exist because the components you're using aren't what you seem to to think they are.

 

This has been quiet for a little while. Are 710 285s the way to go???? I know it will depend on conditions but just trying to get more information from you all! Any input is appreciated. Has anyone actually weighed a 245 and a 285 kumho? Hoosier?

 

Tirerack list them as:

V710 245 23lbs
V710 285 25lbs

A6 245 21lbs
A6 275 23lbs
A6 285 24lbs
A6 295 24lbs

 

When I weighed the 285 HoHo (new) and 245 Kumho (65 runs), on the same scale, they both weighed right at 22.8lbs.

I think many of the Tirerack's weights are off, a bit. For example, they have the OZ Ultraleggera at 18.4 and mine only weigh 16.0, or a bit less than Jason's unobtanium SSR's

 

kumhousa.com says:
245 21.7lbs
285 23.7lbs

You would think with that light of a wheel you would be faster.

I just mounted some 245 V710s on some BoxsterS wheels, I should have weighed one.

 

The wheel itself? If it's OE Porsche, it weighs exactly one fuckton.

 

Thats just the 7.5 front... The rear weighs like 10 disimos.

 

That's it? I guess John didn't check the Helium wheel option box. Hmm...

 

for the person asking about using 285 V710s, getting a new set to seal the outer bead and inflate on an 8" wheel is something that 99.99999999999999999% of the tire installers in the US are incapable of achieving

any good race shop/tire installer can get 285 Hoosiers mounted up, the sidewalls are quite different between the two

you may end up with a $1300 set of tires you can't use

 

Wasn't an option in 2000

 

^^^^^^ damn!

 

Thanks for all of your input. Do certain wheels work better for 285s? Has anybody tried ordering 285 710s from tirerack mounted on OZs?

 

I read online about someone trying and Tirerack told them no.

Found it: http://www.solsticeforum.com/forum/s...highlight=v710

 

As always, thanks Jason and everyone else for the information. This makes the decision much easier.

 

Tirerack can't even handle 245 V710s on an 8" wheel, I sat down there for four hours on route to the Oscoda Pro, the mounter looked completely clueless, then when I got to the event he had gouged out the silicone bead on my 3 pc wheels, one wouldn't hold air and two others had persistant leaks

never again ...

 

I find that very surprising. I've never had a problem getting the 245's mounted up locally, just going to my buds at Big O

 

I put 245s on 7.5s this week. Just takes skills and lots of four letter words.

Once your tire guy figures it out it is easy. If they are new they will give up before they figure it out.

 

yeah, the only reason I had it done there is because I figured they knew what they're doing, I could have just picked up the tires and had Hoosier Tom mount them up instead. He ended up swapping them onto the rain tire wheels as it was ...