- 87,808
- Rule 12
- GTP_Famine
Using:
The Maximum Speed Test in GT3's Machine Test section.
Ford GT40 road car, with hybridised downforce values
I attempted to keep launches and lines standard throughout...
I was attempting to discover what the value assigned to the magic zero downforce code actually was. Based on previous experience, and a little educational guessing, I'd figured around 2.55 was the maximum downforce value.
I started off using 6 different (colour-coded
) GT40s with "reasonable" DF values, covering my theorised figure. I made 5 max speed runs, noting the terminal speed, 0-400m time and 0-1000m time and averaged.
White GT40; DF 0.50/1.00
Average 400m: 11.845s
Average 1000m: 21.842s
Average Vmax: 178.6mph
Nothing to report here...
Yellow GT40; DF 1.00/1.50
Average 400m: 11.904s
Average 1000m: 22.078s
Average Vmax: 168.2mph
Well, maximum speed drops by 6%. Otherwise, not significantly slower - and still within normal game parameters.
Green GT40; DF 1.50/2.00
Average 400m: 11.932s
Average 1000m: 22.290s
Average Vmax: 159.0mph
Another massive speed drop (another 6% from the original). 400m and 1000m times suffering, but not badly.
Red GT40: DF 2.00/2.50
Average 400m: 11.971s
Average 1000m: 22.505s
Average Vmax: 148.8mph
Another huge speed drop. 400m times seem to be hitting the "diminishing returns" point - they're getting worse, but not much. 1000m times are starting to show the strain...
Blue GT40; DF 2.50/3.00
Average 400m: 11.886s
Average 1000m: 22.043s
Average Vmax: 156.5mph
Well, the 400m and 1000m times show a significant improvement. The top speed does too, but... at 156mph the car swerves violently to the right and becomes uncontrollable. Almost as if the downforce on the front waaay exceeded the downforce on the rear...
Black GT40; DF 3.00/3.50
Average 400m: 11.842s
Average 1000m: 21.813s
Average Vmax: 179.8mph
This car, despite an indicated higher DF than the first, is comparable to, but quicker than it. This implies that the DF is similar, yet lower. It seems the point at which DF values restart from 0 is around, but above 2.50...
For the second step of the experiment, I used cars with equal DF front and rear, starting at 2.50/2.50 and going up in 0.1 intervals to 3.00/3.00
White GT40; DF 2.50/2.50
Average 400m: 12.063ss
Average 1000m: 22.691s
Average Vmax: 147.1mph
Wouldn't get above 4th gear. Slooow 400m and 1000m times...
Yellow GT40; DF 2.60/2.60
Average 400m: 11.816s
Average 1000m: 21.556s
Average Vmax: 191.0mph
Quickest to 400m and 1000m so far. Bounced off the rev limiter in top. So the maximum downforce figure is between 2.50 and 2.59. Not wanting to waste a theory, I only ran 2 more cars.
Blue GT40; DF 2.55/2.55
Average 400m: 11.995s
Average 1000m: 22.618s
Average Vmax: 146.8mph
By my theory, this should be maximum downforce - the equivalent of lazily typing 292=0, 296=0 in the ini. And it's by far the slowest car yet.
Black GT40; DF 2.56/2.56
Average 400m: 11.746s
Average 1000m: 21.463s
Average Vmax: 190.9mph
What a difference a click makes... Quickest to 400m and 1000m. Again bounced of the rev limiter in top gear.
So once again, downforce values are cyclical. They can be set anywhere from 0 (ini =-1) to 255, at which point they reset and start all over again. The car with 3.00/3.50 DF behaved like a car with 0.45/0.95 downforce, because it WAS a car with 0.45/0.95 downforce.
The Maximum Speed Test in GT3's Machine Test section.
Ford GT40 road car, with hybridised downforce values
I attempted to keep launches and lines standard throughout...
I was attempting to discover what the value assigned to the magic zero downforce code actually was. Based on previous experience, and a little educational guessing, I'd figured around 2.55 was the maximum downforce value.
I started off using 6 different (colour-coded
) GT40s with "reasonable" DF values, covering my theorised figure. I made 5 max speed runs, noting the terminal speed, 0-400m time and 0-1000m time and averaged.White GT40; DF 0.50/1.00
Average 400m: 11.845s
Average 1000m: 21.842s
Average Vmax: 178.6mph
Nothing to report here...
Yellow GT40; DF 1.00/1.50
Average 400m: 11.904s
Average 1000m: 22.078s
Average Vmax: 168.2mph
Well, maximum speed drops by 6%. Otherwise, not significantly slower - and still within normal game parameters.
Green GT40; DF 1.50/2.00
Average 400m: 11.932s
Average 1000m: 22.290s
Average Vmax: 159.0mph
Another massive speed drop (another 6% from the original). 400m and 1000m times suffering, but not badly.
Red GT40: DF 2.00/2.50
Average 400m: 11.971s
Average 1000m: 22.505s
Average Vmax: 148.8mph
Another huge speed drop. 400m times seem to be hitting the "diminishing returns" point - they're getting worse, but not much. 1000m times are starting to show the strain...
Blue GT40; DF 2.50/3.00
Average 400m: 11.886s
Average 1000m: 22.043s
Average Vmax: 156.5mph
Well, the 400m and 1000m times show a significant improvement. The top speed does too, but... at 156mph the car swerves violently to the right and becomes uncontrollable. Almost as if the downforce on the front waaay exceeded the downforce on the rear...
Black GT40; DF 3.00/3.50
Average 400m: 11.842s
Average 1000m: 21.813s
Average Vmax: 179.8mph
This car, despite an indicated higher DF than the first, is comparable to, but quicker than it. This implies that the DF is similar, yet lower. It seems the point at which DF values restart from 0 is around, but above 2.50...
For the second step of the experiment, I used cars with equal DF front and rear, starting at 2.50/2.50 and going up in 0.1 intervals to 3.00/3.00
White GT40; DF 2.50/2.50
Average 400m: 12.063ss
Average 1000m: 22.691s
Average Vmax: 147.1mph
Wouldn't get above 4th gear. Slooow 400m and 1000m times...
Yellow GT40; DF 2.60/2.60
Average 400m: 11.816s
Average 1000m: 21.556s
Average Vmax: 191.0mph
Quickest to 400m and 1000m so far. Bounced off the rev limiter in top. So the maximum downforce figure is between 2.50 and 2.59. Not wanting to waste a theory, I only ran 2 more cars.
Blue GT40; DF 2.55/2.55
Average 400m: 11.995s
Average 1000m: 22.618s
Average Vmax: 146.8mph
By my theory, this should be maximum downforce - the equivalent of lazily typing 292=0, 296=0 in the ini. And it's by far the slowest car yet.
Black GT40; DF 2.56/2.56
Average 400m: 11.746s
Average 1000m: 21.463s
Average Vmax: 190.9mph
What a difference a click makes... Quickest to 400m and 1000m. Again bounced of the rev limiter in top gear.
So once again, downforce values are cyclical. They can be set anywhere from 0 (ini =-1) to 255, at which point they reset and start all over again. The car with 3.00/3.50 DF behaved like a car with 0.45/0.95 downforce, because it WAS a car with 0.45/0.95 downforce.
