Black GT against my CS




I did some playing with Excel...
Gear-for-gear the 5 speed Auto has higher gear ratios, therefore (in theory) should be faster through each gear. Although, this also puts the top of each gear at a lower speed than in the manual. You might find some of these theoretical "perfect" world numbers somewhat surprising. We're assuming no drag and perfect traction (two things that cannot exist together in the physical world we know)
Key points:
Gear Ratios (Manual - Auto)
3.38 - 1 - 3.75 (+11%)
2.00 - 2 - 2.19 (+9.5%)
1.32 - 3 - 1.41 (+6.8%)
1.00 - 4 - 1.00 (+0.0%)
.675 - 5 - 0.72 (+6.7%)
Manual Loss set at 14%
Automatic Loss set at 18%
Torque curves assumed flat based on torque range in each gear.
Assume shift point at 6000rpm.
Weight used is GROSS weight of 3450 and 3500 for manual and auto respectively.
Assumed shift times of 0.5 seconds for manual and 0.2 seconds for automatic.
Time comparisons
Set 1: 3.55 Manual vs 3.31 Auto
0.88 - 20mph - 0.90
1.75 - 40mph - 2.07
3.76 - 60mph - 3.64
6.25 - 80mph - 6.04
8.57 - 100mph - 8.52
12.15 - 120mph - 12.22
16.15 - 140mph - 15.83
Arguement presented by rick = 75 to 100 auto is faster.
False.
Theoretical time between 75 to 100mph
Manual 3.01 sec
Auto 3.22 sec
(Both stay in 3rd gear)
Set 2: 3.55 Manual vs 3.55 Auto
0.88 - 20mph - 0.84
1.75 - 40mph - 2.00
3.76 - 60mph - 3.46
6.25 - 80mph - 5.89
8.57 - 100mph - 8.61
12.15 - 120mph - 11.98
16.15 - 140mph - 15.84
Arguement presented by rick = 75 to 100 auto is faster.
False.
Theoretical time between 75 to 100mph
Manual 3.01 sec
Auto 3.41 sec
(Auto shifts to 4th at 96mph +0.2s)
Set 3: 4.10 Manual vs 4.10 Auto
0.76 - 20mph - 0.73
2.18 - 40mph - 1.87
4.05 - 60mph - 3.56
6.06 - 80mph - 5.56
8.93 - 100mph - 8.58
12.32 - 120mph - 11.82
16.53 - 140mph - 16.02
Arguement presented by rick = 75 to 100 auto is faster.
False.
Theoretical time between 75 to 100mph
Manual 3.48 sec
Auto 3.62 sec
(Manual shifts to 4th at 90mph +0.5s)
(Auto shifts to 4th at 84mph +0.2s)
..Just some food for thought.
And here's a sample of equally modded Manual vs Auto
http://www.youtube.com/watch?v=TBcO-fpyG8A
From the 1/8th my Manual was faster by 0.03
Gear-for-gear the 5 speed Auto has higher gear ratios, therefore (in theory) should be faster through each gear. Although, this also puts the top of each gear at a lower speed than in the manual. You might find some of these theoretical "perfect" world numbers somewhat surprising. We're assuming no drag and perfect traction (two things that cannot exist together in the physical world we know)
Key points:
Gear Ratios (Manual - Auto)
3.38 - 1 - 3.75 (+11%)
2.00 - 2 - 2.19 (+9.5%)
1.32 - 3 - 1.41 (+6.8%)
1.00 - 4 - 1.00 (+0.0%)
.675 - 5 - 0.72 (+6.7%)
Manual Loss set at 14%
Automatic Loss set at 18%
Torque curves assumed flat based on torque range in each gear.
Assume shift point at 6000rpm.
Weight used is GROSS weight of 3450 and 3500 for manual and auto respectively.
Assumed shift times of 0.5 seconds for manual and 0.2 seconds for automatic.
Time comparisons
Set 1: 3.55 Manual vs 3.31 Auto
0.88 - 20mph - 0.90
1.75 - 40mph - 2.07
3.76 - 60mph - 3.64
6.25 - 80mph - 6.04
8.57 - 100mph - 8.52
12.15 - 120mph - 12.22
16.15 - 140mph - 15.83
Arguement presented by rick = 75 to 100 auto is faster.
False.
Theoretical time between 75 to 100mph
Manual 3.01 sec
Auto 3.22 sec
(Both stay in 3rd gear)
Set 2: 3.55 Manual vs 3.55 Auto
0.88 - 20mph - 0.84
1.75 - 40mph - 2.00
3.76 - 60mph - 3.46
6.25 - 80mph - 5.89
8.57 - 100mph - 8.61
12.15 - 120mph - 11.98
16.15 - 140mph - 15.84
Arguement presented by rick = 75 to 100 auto is faster.
False.
Theoretical time between 75 to 100mph
Manual 3.01 sec
Auto 3.41 sec
(Auto shifts to 4th at 96mph +0.2s)
Set 3: 4.10 Manual vs 4.10 Auto
0.76 - 20mph - 0.73
2.18 - 40mph - 1.87
4.05 - 60mph - 3.56
6.06 - 80mph - 5.56
8.93 - 100mph - 8.58
12.32 - 120mph - 11.82
16.53 - 140mph - 16.02
Arguement presented by rick = 75 to 100 auto is faster.
False.
Theoretical time between 75 to 100mph
Manual 3.48 sec
Auto 3.62 sec
(Manual shifts to 4th at 90mph +0.5s)
(Auto shifts to 4th at 84mph +0.2s)
..Just some food for thought.
And here's a sample of equally modded Manual vs Auto
http://www.youtube.com/watch?v=TBcO-fpyG8A
From the 1/8th my Manual was faster by 0.03
Last edited by Enfynet; Nov 30, 2008 at 03:13 AM. Reason: Added video link
You still ignored the unbiased numbers that say from 75-100 the manual has the advantage. But what do I know...




,,,show me the money $$$ first .




you have something against a black GT/CS
,,,its time for a change.
So far, all's I've seen and heard is a troll who keeps coming back here to talk smack.
That would just be crazy.....