BRI revisited

[Carl Scragg]

So to my amazement, recent posts suggested that some of our racers actually thought that the BRI is still less than perfect! Endeavoring to make certain that only the most deserving drivers get to openly brag about the dolphin, I have once again foolishly ventured into the murky world of handicapping the different classes.

There seemed to be general agreement that N had too soft an index. This is almost certainly due to the fact that the index is driven by results in our database (which now goes back almost 5 years). Only recently have we seen the GT2 and the GT3 competing in N class, and the results of these cars are considerably faster that the historic average of cars in the class.

Someone suggested that we use only the most recent year or two, rather than the entire 5-year database. Comparing a 5-year average to a 2-year average, it is obvious that a few classes have become much more competitive (i.e. faster) in the last couple of years and probably should have their index adjusted upward.

After listening to the suggestions, and reviewing the database, I decided that it was time to consult the Ouija Board and come up with some tweaks to the BRI. So here are the proposed changes:

AS/S: increase index from 0.961 to 0.970 (sorry George, but you’re too fast)
CS/S: increase index from 0.975 to 0.980 (ditto to the Hauptmans)
MS/S: decrease index from 1.028 to 1.022
NS/S: increase index from 1.033 to 1.050 (with apologies to Neil)

Indices for stock classes would continue to be 0.025 higher than SS, prepared 0.25 higher that stock, etc.

We’ve still got 2 weeks before the next AX to argue about these proposed changes, so get out your own Ouija Board, read the tea leaves (or goat entails), Tarot cards, or whatever.

Anybody have any idea’s about a certain 911 that’s dominating GSS?

[kary]

So, would you like me to adjust the BRI table data to reflect thenew adjustments?

More importantly, I had designed the BRI table data to be date dependent, meaning we could change BRI results and have versions of it based upon the date it was in use. This way we can see the difference in the BRI by looking at event date ranges.

Or I can just change the existing BRI data and forget about the historic changes.

Feedback?

[jgunn]

Looks like an improvement to me.

James

[Gary Burch]

Dealing with this is a huge amount of work and it is greatly appreiated,but I am curious how a LSS 2000 Boxster can have the same index as a 1971 911 FS car.

[ttweed]

Anybody have any idea’s about a certain 911 that’s dominating GSS?

No, Carl, that index looks fine to me.

TT

[Red Rooster]

Anybody have any idea’s about a certain 911 that’s dominating GSS?

No, Carl, that index looks fine to me.

TT

snicker.......

[Carl Scragg]

Gary Burch wrote:

. . . but I am curious how a LSS 2000 Boxster can have the same index as a 1971 911 FS car.


Well Gary, the BRI is a databased system, and as such it just reflects how cars and drivers in our club have been doing for the past few years. Over the last 5 years, the winning times in FS and LSS have, on average, differed by less than one tenth of one percent.

How can this be ?

The LSS Boxster has more hp, wider tires, bigger brakes, ABS, mid-engine 50/50 weight distribution, a better transmission and 25 years of suspension development.

The FS 911 has less weight, sticky tires, and Porsche racing heritage. Hmmmmm! Could there be a reason why you like those old cars?

[Dan Chambers]

Anybody have any idea’s about a certain 911 that’s dominating GSS?[/quote]

Well Carl, I'm afraid adjusting the BRI for that particular pesky 911 in GSS would open up a serious can of worms.

When you have an outstanding, and long-experienced driver like the good Mr. Tweed , sitting in a car that has a better weight-to-power ratio , you have 944's labeled "doormat" in GSS.

Now , put Tom T. behind the wheel of a 944 , or put a less skilled driver in his stock 911 , and you'll most likely have closer times at the finish line between either the car , or maybe (just maybe) the driver . Put the quick-sprint car and the highly-skilled driver together, and you have GSS Class Devistation .

Trying to balance a quick-sprint car and excellent driving skills (911 with Mr. TT ) against cruising "yachts" with young drivers (944 drivers with an average experience level of 3 to 4 years ) in the BRI won't be the answer - alas . The answer, I'm afraid, will be for some of us in the 944's to become better, more experienced drivers . "Patience, Grasshopper."

Your Humble Doormat Driver.

[Jad]

Just make TT give cookies to everyone he beats, then everyone is happy

[Gary Burch]

Thanks Carl

I do like the old 911's, and they hang with the newer 911's and the Boxsters. I won't mention the 944's, that seems to be a sore point.

[kary]

Gary, now I think you might have gone too far about older 911's hanging with newer 911's, but then in the next auto-x if you beat me then I will be

[Gary Burch]

Kary

we are talking BRI here aren't we???

[kary]

Gary, with th new index numbers I kind of like my chances

[David J Marguglio]

Err...just so I am clear. Are we attempting to handicap the cars or the drivers?

[Jad]

As far as I can tell, most of the drivers are already pretty well handicapped

Do the suggested changes (the useful ones that is ) result in substantial changes to the results, or do just 1 or 2 people change?