Minimum Achievable weights???
- Thread starter Banzai240
- Start date
Dave Zaslow
New member
ITB VW Rabbit
Spec 2180#
Race 2180# with 5 gal in tank (post race)
Driver 185#
spare tire on steel wheel installed (+/- 30#)
extra bars in cage (about 15 feet)
basic fire system
undercoating not scraped off
no other extraordinary measures
car could easily be 30-50# lighter
lots of other Rabbit GTI's are running a lot of lead
Spec 2180#
Race 2180# with 5 gal in tank (post race)
Driver 185#
spare tire on steel wheel installed (+/- 30#)
extra bars in cage (about 15 feet)
basic fire system
undercoating not scraped off
no other extraordinary measures
car could easily be 30-50# lighter
lots of other Rabbit GTI's are running a lot of lead
Allen Brown
New member
Here's one more...
Car: 1985 RX-7 GSL-SE
Class: ITS
Spec Weight: 2530 lb
Race Weight: 2530 lb. w/no ballast, approx. 3 gal fuel, and NO windshield washer bottle
Driver Weight: 175 lb
Car: 1985 RX-7 GSL-SE
Class: ITS
Spec Weight: 2530 lb
Race Weight: 2530 lb. w/no ballast, approx. 3 gal fuel, and NO windshield washer bottle
Driver Weight: 175 lb
Updated stats:
Sample size: 37
Mean: 192.5#
StdDev: 34.1#
That calculates to a z-score of 2.23. This is greater than 1.96 (normal distribution, greater than 30 sample size, 95% confidence level), indicating that the sample average weight is statistically greater than the accepted population average of 180#...
We're, on average, a bunch of lard butts.
Banzai240
New member
You guys crack me up!
Here, since you seem to have nothing but "Statistical" time on your hands... here is a link to the data I've collected thus far (Minus the last post for the GSL-SE RX-7)...
I'll update this as new data arrives. I've calculated the required ballast for both a 180lb and a 220lb driver to give a range of ballast weight that would be required. As you can see, very few cars are pushing the current 100lb limit, though I suspect there are some that are "better developed" (meaning, they've bent the rules every way possible to try to remove weight...) that may be getting close...
If you come up with any interesting observations, be sure to post them... You may see something that no one else thought of!
Enjoy!
IT Ballast Spreadsheet
------------------
Darin E. Jordan
SCCA #273080, OR/NW Regions
Auburn, WA
ITS '97 240SX
[This message has been edited by Banzai240 (edited November 03, 2003).]
planet6racing
New member
Vehicle: 1992 Saturn SL2
Class: ITA
Classification weight: 2360
Actual weight: 2520
Driver Weight: 195
Note: this was before my current weight reduction project to remove everything the rules allow. In April, when I'm down 20# and the car is stripped to the minimum, I'll re-weigh.
------------------
Bill
Planet 6 Racing
bill (at) planet6racing (dot) com
Class: ITA
Classification weight: 2360
Actual weight: 2520
Driver Weight: 195
Note: this was before my current weight reduction project to remove everything the rules allow. In April, when I'm down 20# and the car is stripped to the minimum, I'll re-weigh.
------------------
Bill
Planet 6 Racing
bill (at) planet6racing (dot) com
G
Guest
Guest
cant open the file Darin, win xp dosnt reconize the format.
G
Guest
Guest
ya right, try this, "I HATE BEER, I HATE BEER ect"
Banzai240
New member
OH, sorry, I should have told you what it was...
The file is an Excel Spreadsheet. Try right clicking on the link, then "save target as...", then open it with Excel. If that doesn't work, let me know and I'll see about putting it into a text format and just posting it here...
Thanks
------------------
Darin E. Jordan
SCCA #273080, OR/NW Regions
Auburn, WA
ITS '97 240SX
Most of y'all are in the situation I was in about 2 seasons ago. I went from 222# to 165# when my Dr wouldnt sign off on my SCCA physical due to my blood pressure( the goal # goes down as your age goes up and at age 45, I hit the wall. I decided to try to reduce my bp without medication and my Dr laughed saying that I could not lose enough weight to make a difference. I won! Now it is just a matter of maintenance kinda like the car.
Banzai240
New member
Wow... that's quite a change in weight. That would definately take care of my minimum weight problem, however, I'd likely not have enough strength to drive the car at that weight...
I'm 6'3", and haven't weighed 165 since about 8th grade! Ideal for me would be about 195 to 200, which is only about 20lbs away...
Good Job on lowering you BP!
DJ
Here goes...
Car: BMW 5-series wagon
IT Class: IT's class is "street"
Spec Weight: Can't find it in the GCR, but the owner's manual says something like 3,650
Race Weight: With the two dogs in the back (they love the station wagon tour), it's good for 3,800. I'm sure I could find another 100# of tools, but they might crowd the dogs.
Driver weight: 200
Ta Da! An even two tons!
Thankfully, the car has a great set of brakes.
------------------
Gregg Baker
Isaac, LLC
[email protected]
Car: BMW 5-series wagon
IT Class: IT's class is "street"
Spec Weight: Can't find it in the GCR, but the owner's manual says something like 3,650
Race Weight: With the two dogs in the back (they love the station wagon tour), it's good for 3,800. I'm sure I could find another 100# of tools, but they might crowd the dogs.
Driver weight: 200
Ta Da! An even two tons!
Thankfully, the car has a great set of brakes.
------------------
Gregg Baker
Isaac, LLC
[email protected]
Bill Miller
New member
Darin,
My Rabbit GTI used 1.5 x 0.120 tubing instead of the required 0.095. It also had ~20' of extra tubing in it. I still had to run 50# of ballast to just make weight w/ 1/2 a tank of fuel. Mfg's curb weight on the car was 2011#. I figure w/o the larger tubing size, and the extra 20' of tubing, I'd have to run the full 100# of ballast and try and finish w/ close to a full tank of fuel. Oh yeah, I guess I better have a couple more Wendy's Big Bacon Classics!
------------------
MARRS #25 ITB Rabbit GTI (sold) | MARRS #25 HProd Rabbit
SCCA 279608
RSTPerformance
New member
Actually my car runs with 75# of ballast and a full tank of gas.... (18 gallons) this will bring me in about 10# over the limit for an event that runs for about 30min. The only reason I run with more weight is because of the location of the weight.... over the rear wheels as apposed to the front of the car.
What I do not understand is why the exact same car in ITB with bigger brakes has to weight 50# more than the other one. The only reason I don't understand is becasue in the past we did not do competition adjustments when figuring out the weight of any car...... ya sure that's what they say anyway
Stephen
Bill Miller
New member
Stephen,
It looks like there are some differences in the gear ratios as well.
Also, per what was published in FasTrack, and what I think has been generally accepted as the way they do things, the cars are comp. adjusted when they're classified. Or at least the weights are set based on a collection of factors, one of which is the size of the brakes.
Kind of like the A2 16v Golf in ITA weighs less than the A2 8v Golf in ITB.
------------------
MARRS #25 ITB Rabbit GTI (sold) | MARRS #25 HProd Rabbit
SCCA 279608
It looks like there are some differences in the gear ratios as well.
Also, per what was published in FasTrack, and what I think has been generally accepted as the way they do things, the cars are comp. adjusted when they're classified. Or at least the weights are set based on a collection of factors, one of which is the size of the brakes.
Kind of like the A2 16v Golf in ITA weighs less than the A2 8v Golf in ITB.
------------------
MARRS #25 ITB Rabbit GTI (sold) | MARRS #25 HProd Rabbit
SCCA 279608