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  #1  
Old 01-23-2006, 10:39 PM
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Join Date: May 2003
Posts: 2,220
Thumbs up Neat calculator. Not diesel specific.

http://www.nightrider.com/biketech/accel_sim1.htm

Put in any car you want. Use the simple corresponding physics equations to get your numbers for frontal area, tire height, maximum torque etc.

I entered in the 300SDL. At 2400, assume 201 lb/ft of torque. At 4600, about 168 lb/ft, since the horsepower peaks at that point. All points inbetween indicate a gradual descension until the hp peak. Shift point at 4800.

I received this data:

Summary 300SDL Turbo
0-60: 12.98
0-100: 50.05
60 ft: 2.98 @ 25.13
330 ft: 7.95 @ 47.94
1/8 mile: 12.18 @ 57.20 (58.15 actual)
1000 ft: 15.90 @ 66.41
1/4 mile: 19.03 @ 72.07 (72.67 actual)
Top Speed: 129.05 @ 111.30 (17933 ft)
Max Accel: 0.407G

Topspeed seems a LITTLE low. I calculated a 20% drivetrain loss, 28.2 frontal area and 0.37 Cd for the W126.

Next, I will work on the 350. Then, I will try my 300SE.


Summary 350SD Turbo
0-60: 12.50
0-100: 45.18
60 ft: 2.90 @ 26.29
330 ft: 7.83 @ 48.38
1/8 mile: 12.05 @ 57.79 (58.83 actual)
1000 ft: 15.70 @ 67.94
1/4 mile: 18.75 @ 73.87 (74.45 actual)
Top Speed: 104.90 @ 109.78 (14162 ft)
Max Accel: 0.436G

Summary 300SE
0-60: 9.65
0-100: 30.10
60 ft: 2.63 @ 28.71
330 ft: 7.08 @ 53.50
1/8 mile: 10.93 @ 62.87 (63.94 actual)
1000 ft: 14.30 @ 73.62
1/4 mile: 17.13 @ 80.24 (80.96 actual)
Top Speed: 116.03 @ 124.34 (17970 ft)
Max Accel: 0.518G

So far, its not far off.

I'll keep updating this post:

Summary 300D Turbo
0-60: 10.63
0-100: 35.28
60 ft: 2.83 @ 26.65
330 ft: 7.53 @ 50.59
1/8 mile: 11.45 @ 61.28 (62.26 actual)
1000 ft: 14.93 @ 71.18
1/4 mile: 17.85 @ 77.35 (77.99 actual)
Top Speed: 115.58 @ 118.66 (17036 ft)
Max Accel: 0.452G

__________________
1987 300SDL (324000)

1986 Porsche 951 (944 Turbo) (166000)

1978 Porsche 924 (99000)

1996 Nissan Pathfinder R50 (201000)

Last edited by DslBnz; 01-23-2006 at 11:47 PM.
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  #2  
Old 01-23-2006, 11:27 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 38,604
so on top

speed what does it mean 104.333 @ 111.431?

tom w
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #3  
Old 01-23-2006, 11:31 PM
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Join Date: May 2003
Posts: 2,220
Quote:
Originally Posted by t walgamuth
speed what does it mean 104.333 @ 111.431?

tom w
Top speed is the right number. The left number is the amount of seconds it took to reach it.

When you throw in the statistics, it gives out a detailed charts for every mph accelerated, in microseconds.
__________________
1987 300SDL (324000)

1986 Porsche 951 (944 Turbo) (166000)

1978 Porsche 924 (99000)

1996 Nissan Pathfinder R50 (201000)
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  #4  
Old 01-24-2006, 02:11 AM
ForcedInduction
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Quote:
Originally Posted by DslBnz
Summary 300D Turbo
0-60: 10.63
0-100: 35.28
60 ft: 2.83 @ 26.65
330 ft: 7.53 @ 50.59
1/8 mile: 11.45 @ 61.28 (62.26 actual)
1000 ft: 14.93 @ 71.18
1/4 mile: 17.85 @ 77.35 (77.99 actual)
Top Speed: 115.58 @ 118.66 (17036 ft)
Max Accel: 0.452G
Do you mean an 87 300D?
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  #5  
Old 01-24-2006, 11:15 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 38,604
the figures on the 350

sound about right.

tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #6  
Old 01-26-2006, 01:04 AM
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Join Date: May 2003
Posts: 2,220
Its kind of hard to configure at first.

Just remember Torque = (HP times 5252)/ rpm

Frontal area = L times W of vehicle dimensions (EG 4.725 X 5.975 for the W126)

Tire diameter (25.5 inch = 205/65/15)

Set shift points, and run the simulator.

Here's a 300SD '81 - '84

Summary 300SD turbodiesel
0-60: 14.00
0-100: 59.80
60 ft: 3.05 @ 24.61
330 ft: 8.15 @ 46.57
1/8 mile: 12.50 @ 55.67 (56.63 actual)
1000 ft: 16.30 @ 64.89
1/4 mile: 19.50 @ 70.43 (70.99 actual)
Top Speed: 114.78 @ 106.14 (15025 ft)
Max Accel: 0.392G

__________________
1987 300SDL (324000)

1986 Porsche 951 (944 Turbo) (166000)

1978 Porsche 924 (99000)

1996 Nissan Pathfinder R50 (201000)
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