GM C7 specs
#1
Le Mans Master
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GM C7 specs
How is it possible to claim 50/50 weight distribution without knowing the final weight of the vehicle? Now, I see the hp/tq have ESTIMATED attached to it but no such case with the weight distribution. Surely there will be a difference between sum and no sump and manual vs. auto and different wheel and tire combos.
#2
Safety Car
How is it possible to claim 50/50 weight distribution without knowing the final weight of the vehicle? Now, I see the hp/tq have ESTIMATED attached to it but no such case with the weight distribution. Surely there will be a difference between sum and no sump and manual vs. auto and different wheel and tire combos.
It might turn out to be 49.95/50.05 OH NO! Or 50/50
It'll be ok whichever.
#3
How is it possible to claim 50/50 weight distribution without knowing the final weight of the vehicle? Now, I see the hp/tq have ESTIMATED attached to it but no such case with the weight distribution. Surely there will be a difference between sum and no sump and manual vs. auto and different wheel and tire combos.
#4
#6
Team Owner
How is it possible to claim 50/50 weight distribution without knowing the final weight of the vehicle? Now, I see the hp/tq have ESTIMATED attached to it but no such case with the weight distribution. Surely there will be a difference between sum and no sump and manual vs. auto and different wheel and tire combos.
Last edited by JoesC5; 02-14-2013 at 08:01 PM.
#7
Le Mans Master
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Hopefully not like wishful thinking, LOL.
STRENGTH IN NUMBERS
Performance
Features and Options
Data
Engine LT1 6.2L V-8
Horsepower / Torque 450 / 450 (estimated)
Fuel delivery Direct Injection
Compression ratio 11.5:1
Manual Transmission 7-speed with Active Rev Match
Automatic Transmission 6-speed paddle-shift
Chassis Std, Z51, Z51 with Magnetic Selective Ride
Tires Michelin Pilot Sport ZP run-flat
Wheels 18" front / 19" rear, 19" front / 20" rear (Z51)
Three Available Option Groups 1LT, 2LT, 3LT
Available Roof Options
Painted Carbon Fiber,
Visible Carbon Fiber,
Transparent
Wheelbase (in/mm) 106.7 / 2710
Overall length (in/mm) 177 / 4495
Overall width (in/mm) 73.9 / 1877
Overall height (in/mm) 48.6 / 1235
Weight distribution (%) 50 / 50 (front/rear)
Track (in)62.8 / 61.6 (front/rear)
Brake Diameter (in) 12.6 (13.6 Z51) (front), 13.3 (rear)
Obviously GM knows what word ESTIMATED means. So my question is, how are they exactly are intending to deliver on the weight distribution without even estimating the weight, load per axle, sprung and unsprung weight and few other details?
STRENGTH IN NUMBERS
Performance
Features and Options
Data
Engine LT1 6.2L V-8
Horsepower / Torque 450 / 450 (estimated)
Fuel delivery Direct Injection
Compression ratio 11.5:1
Manual Transmission 7-speed with Active Rev Match
Automatic Transmission 6-speed paddle-shift
Chassis Std, Z51, Z51 with Magnetic Selective Ride
Tires Michelin Pilot Sport ZP run-flat
Wheels 18" front / 19" rear, 19" front / 20" rear (Z51)
Three Available Option Groups 1LT, 2LT, 3LT
Available Roof Options
Painted Carbon Fiber,
Visible Carbon Fiber,
Transparent
Wheelbase (in/mm) 106.7 / 2710
Overall length (in/mm) 177 / 4495
Overall width (in/mm) 73.9 / 1877
Overall height (in/mm) 48.6 / 1235
Weight distribution (%) 50 / 50 (front/rear)
Track (in)62.8 / 61.6 (front/rear)
Brake Diameter (in) 12.6 (13.6 Z51) (front), 13.3 (rear)
Obviously GM knows what word ESTIMATED means. So my question is, how are they exactly are intending to deliver on the weight distribution without even estimating the weight, load per axle, sprung and unsprung weight and few other details?
#8
Le Mans Master
Length, width, blah blah but no weight.
#10
Le Mans Master
Seems there's a simple enough explanation: they're close enough to final mass that they know any tweaks still on the table won't change the balance enough to miss the 50/50 target. Anything less than 50.5% up front and they're good.
#14
Team Owner
I think the 48/52 was inherited with the Stingray name used on the C7 as that's the weight distribution of a C2 with the small block.
#15
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LOL, it is all in the genes then. I wish GM could put some substance behind their claims. I would be curious what the weight distribution of the last GS with dry sump was, I never saw this being disclosed.
#20
Team Owner
Some interesting info from years of Road & track.
1957....
curb weight 2880
test weight 3180
distribution 53.5/46.5
1963...327ci
curb weight 3030
test weight 3380
distribution 48/52
1965...396ci
curb weight 3260
test weight 3570
distribution 51/49 with driver aboard.
1968...327ci
curb weight 3260
test weight 3525
distribution 49/51 with driver aboard.
1987...350ci
curb weight 3280
test weight 3440
distribution 50/50 with driver aboard
1957....
curb weight 2880
test weight 3180
distribution 53.5/46.5
1963...327ci
curb weight 3030
test weight 3380
distribution 48/52
1965...396ci
curb weight 3260
test weight 3570
distribution 51/49 with driver aboard.
1968...327ci
curb weight 3260
test weight 3525
distribution 49/51 with driver aboard.
1987...350ci
curb weight 3280
test weight 3440
distribution 50/50 with driver aboard