How about non-calibrated scales?

 

jft,

is the scale you used is accurate ? is it also used for weighing trucks/trailers as well? although the number you provided is great news but the data from the us owners (which was measured at race shops) and your data do not explain the big difference in weight between us and row cars and gt3/gt3rs.

i think we need more data from row cars and us cars (rs) to reach concrete conclusions.

 

Definetly need more accurate scales that have been calibrated. Many of the single platform vehicle scales are only accurate to plus or minus 4% when calibrated.

 

I wouldn't trust any scale except the ones found at good race shops. Using a vehicle weight scale found at truck monitoring stations are better at measuring very high weights. Not the 3000 Lbs range that our cars are at.

 

Since Sport Auto just registered the same lap time in the RS at the Ring as the 997 GT3, I wonder if there is any meaningful weight advantage at all. Although I've often wondered about the whole concept of comparing Ring time, even in the best of circumstances there could be so many variables (traffic, temperature, pavement condition, etc) on that long of a course that validity of car-to-car lap time comparisons is questionable. Still, you'd think 300 lbs would make a difference.

Gary

 

Lot's of questions.

Yes, it has air con.

On the question if the scale is accurate I honestly don't know. It's operated by a government authority, but I cannot tell you that means it's 100% accurate. It cannot be used for larger trucks (it was too small).

 

If that is true then my car is lighter than Porsche's own claim. According to what you say my car should have weighed:

1,375kg
+ 17kg (aircon)
+ 20kg (steel brakes)
- 5kg (85 liters of fuel instead of 90)
- 1kg (just one "bar" of oil)
= 1,406kg

So at 1,393kg it was 13kg lighter than this.

Anyway, even if the scale was off, I am sure it's wasn't off by 100kg. So I am still positively surprised.

 

Are you sure about that?

EVO June 2006 pg 82.
....."Those startling figures are due in part to the GT3's weight of 1395kg. On paper that makes it 15 kg heavier than the last model, but the figures are skewed because the old model didn't have air-con ast standard. The new GT3 does, and it accounts for a hefty 20kg......"

Air con is standard - deletable, but standard - and so are steel brakes.

 

gary,

do you have an electronic copy of the test data? thanks.

 

just found the thread.

 

interesting side point about car weights a similar post about eh sport auot test at rennteam shows actual magazine scans and other info that quotes

1440kg ( 3168lbs) for GT3 (non-CS) and 1424kg (3132 lbs) for RS both with PCCB

so if we add PCCB weight back to the GT3 42lbs ? we have 3210 lbs which is 80 lbs or so less than the best number we have seen here that could b due to sunroof (30lbs) and extra DOT stuff(50lbs)

so this seems consitent with the data we have and RS was 36 lbs less i am sure soe small option differences between both cars would account for this number not being the claimed 44lbs

from the data we have i expect US GT3's to be no less than 3290lbs as we have seen and the claimed 44lbs reduction from the RS

also the 3210 lbs number for ROW car is consistent with the claimed 3075 lbs if that number is taken
as one with almost no fuel

 

JFT, I think I'd like to weigh my GT3 on the same scales as you when I get it!
Sportauto's RS, with no aircon and with PCCB, (which should save c. 35kg / 72lbs on your car's standard weight), came in at c. 30kg / 66lbs heavier than yours! So we have a 60-70 kg / 140lb difference between 2 identical cars.
Something's not right.

 

ChrisGB do you know for sure that the RS in Sportauto had no A/C?
WOW

 

I don't know if you are implying that I am not being truthful? I cannot speak intelligently about Sportauto, their test car, or the scales they used. I weighed mine and reported the results. Mainly to be helpful to you all. Cheers!

 

JFT, inte alls vad jag menade! Not attacking you at all, and it's great you posted your info. The confusing thing is the difference in weights people are reporting - it's just weird that the figures don't add up (sorry, used to be an accountant!).

krC2S, on p.37 of the sport auto feature, you get an interior shot of the car where you can see the a/c is not there.