Should we index for tire width too?

ButtDyno · Post by **ButtDyno** » Fri Mar 02, 2012 9:31 am

Just a quick proposal, splitting from the other thread:

0-235: .99
245-265: 1.00
275-285: 1.01
295+: 1.02

Maybe kill the 250+ penalty, and add this to help make sure things are even?

Sky Render · Post by **Sky Render** » Fri Mar 02, 2012 10:07 am

No. Heavier cars require wider tires. A Miata with 255s would need more of a "penalty" than my Mustang with 255s.

Rock Star · Post by **Rock Star** » Fri Mar 02, 2012 10:44 am

I don't know that we should employ it immediately, but It would be interesting to track throughout the season. Just to see what an effect it would have.

I am for it since I run 225s.... but I think it is too drastic of a change to be made without any testing. Anyone want to go back through the data and see what it would have changed?

Sky Render wrote:No. Heavier cars require wider tires. A Miata with 255s would need more of a "penalty" than my Mustang with 255s.

They do, it is in the weight index

Post by **Tedzilla** » Fri Mar 02, 2012 12:58 pm

Weight to tire width is as important as any factor. 3000 lbs on 275s is no big deal, 1500 lbs on 275s is a different matter.

Sky Render · Post by **Sky Render** » Sat Mar 03, 2012 10:11 am

Tedzilla wrote:Weight to tire width is as important as any factor. 3000 lbs on 275s is no big deal, 1500 lbs on 275s is a different matter.

This is my point. Yes, weight is already an index. But if you indexed tire widths, you'd have to have separate indexes for different weights. For instance, running 275s on a Miata might be a 1.02 multiplier, but running 275s on my Muscle-Car/Land-Yacht might be a 0.99.

hepcatz · Post by **hepcatz** » Sat Mar 03, 2012 10:42 am

No, we should not index for tire width. Why mess with the good things of CDC & make it overly complicated? What next, driver weigh in?

FredK · Post by **FredK** » Sat Mar 03, 2012 11:26 am

Great idea, don't forget to account for different front/rear widths. btw, my Miata is faster on 205's than 225's.

Post by **Dan133** » Sat Mar 03, 2012 11:50 am

And don't forget wheel width...

Sky Render · Post by **Sky Render** » Mon Mar 05, 2012 9:21 am

hepcatz wrote:No, we should not index for tire width. Why mess with the good things of CDC & make it overly complicated? What next, driver weigh in?

Yes. And if you eat more than one Italian Sausage for lunch, you get an additional 0.99 modifier for the afternoon heats.

Rock Star · Post by **Rock Star** » Mon Mar 05, 2012 9:29 am

Sky Render wrote: This is my point. Yes, weight is already an index. But if you indexed tire widths, you'd have to have separate indexes for different weights. For instance, running 275s on a Miata might be a 1.02 multiplier, but running 275s on my Muscle-Car/Land-Yacht might be a 0.99.

I understand your point, but I am saying that the weight index would still make this happen, for instance:

275 tires on miata
1.01*1.02 = 1.03

275 tires on mustang
1.01*.99 = 1.00

Thus giving you your indexes that have weight vs. tire width. Which is what you want in the first place. As I said, it already is included.

jrgoldbach · Post by **jrgoldbach** » Wed Mar 07, 2012 12:56 pm

Did we have a change for index on tire compound too? i dont know of any R-Compound tires over 140 treadwear yet that was a selection available for next weekend's event sign up...

Post by **echan** » Wed Mar 07, 2012 2:17 pm

jrgoldbach wrote:Did we have a change for index on tire compound too? i dont know of any R-Compound tires over 140 treadwear yet that was a selection available for next weekend's event sign up...

No tire index is the same as it has been for about three years.

We will not increase the index for vehicles over 250 hp (e.g. the higher index will have the same index as 250 hp. We'll keep the different drop-down in case we need to change it but because its easier).

hufflepuff · Post by **hufflepuff** » Mon Mar 19, 2012 7:10 am

Sky Render wrote:No. Heavier cars require wider tires. A Miata with 255s would need more of a "penalty" than my Mustang with 255s.

the weight index captures your weight.

Capital Driving Club Discussion Forum

Should we index for tire width too?

Should we index for tire width too?

Re: Should we index for tire width too?

Re: Should we index for tire width too?

Re: Should we index for tire width too?

Re: Should we index for tire width too?

Re: Should we index for tire width too?

Re: Should we index for tire width too?

Re: Should we index for tire width too?

Re: Should we index for tire width too?

Re: Should we index for tire width too?

Re: Should we index for tire width too?

Re: Should we index for tire width too?

Re: Should we index for tire width too?