Minimum Achievable weights???

[Banzai240]

Originally posted by MMiskoe:
Can't find anywhere that we could ditch 100# out of that car!!!

I have the same problem with mine...

Thanks for the information! Keep it coming guys/gals...



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Darin E. Jordan
SCCA #273080, OR/NW Regions
Auburn, WA
ITS '97 240SX

[Dave Zaslow]

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

[Don]

1974 Honda Civic 1200
Back dated with 1973 bumpers
SCCA ITC spec with driver 1710
Factory manual lists stock weight at 1635
IT trim, Its an econobox nothing in the interior to throw out except the seats and add the roll cage = 1677lbs
Driver weight 160

[BVNitta]

1974 ITB Opel Manta
GCR #: 2230
Pre-race # (w/driver): 2290
(Gas: 8 gal)
Driver #: 140 (that should drop the avg a bit..)
About 15ft of extra rollcage tubes (30#)
No ballast

Bhima

[moto62]

ITA
'91 Integra
Spec- 2480
Race- 2580 w/ 1/2 tank of fuel
Driver-200
Car and driver could stand to lose some weight
Ray

[Allen Brown]

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

[Greg Amy]

<font face=\"Verdana, Arial\" size=\"2\">Interesting analysis of the driver weight data.</font>

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]

Originally posted by grega:
We're, on average, a bunch of lard butts.

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

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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]

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.


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Bill
Planet 6 Racing
bill (at) planet6racing (dot) com

cant open the file Darin, win xp dosnt reconize the format.

Originally posted by dspillrat:

240-Z
Spec weight...2430
Weighed....2420
1 gallon fuel,some tar left on underside
Driver..205 and counting down

David Spillman

ya right, try this, "I HATE BEER, I HATE BEER ect"

[Banzai240]

Originally posted by 7'sRracing:
cant open the file Darin, win xp dosnt reconize the format.

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

[whenry]

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]

Originally posted by whenry:
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....

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

[gsbaker]

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]

[oanglade]

I went from 350 pounds to about 200 pounds. It was cheaper than buying a new motor and the BP pills money went to the tire budget.

Still can't get the Miata to min. weight...

[Bill Miller]

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...

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!

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MARRS #25 ITB Rabbit GTI (sold) | MARRS #25 HProd Rabbit
SCCA 279608

[RSTPerformance]

Originally posted by Banzai240:


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

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 I thaugt about running the bigger brakes however I can barly make min. weight now and would not be able to with the extra 50#'s

Stephen

[Bill Miller]

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.

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MARRS #25 ITB Rabbit GTI (sold) | MARRS #25 HProd Rabbit
SCCA 279608

[dspillrat]

Originally posted by 7'sRracing:

ya right, try this, "I HATE BEER, I HATE BEER ect"

Hey!! watchit I resemble that remark.....Food in general is the enemy,I like it all
David