Cartest

[cuneus]

Been having a play with Cartest

TVR 350
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CAR SPECIFICATIONS

Engine Displacement: 3528 cc.
Engine Location: FRONT
Engine Type: NORMAL
Engine Max Horsepower: 190 bhp
@: 5280 rpm
Engine Torque: 220 lb-ft
@: 4000 rpm
Compression Ratio: 8.0 :1
Maximum engine speed: 6000 rpm
Start Engine Speed: 1800 rpm
with Clutch: DUMP
Transmission Type: MANUAL
Number of Gears: 5
Gear Ratio 1st: 3.32 :1
Gear Ratio 2nd: 2.09 :1
Gear Ratio 3rd: 1.40 :1
Gear Ratio 4th: 1.00 :1
Gear Ratio 5th: 0.79 :1
Gear Ratio 6th: :1
Final drive ratio: 3.54 :1
Driving wheels: REAR
Car test weight: 2200 lb.
% weight on front wheels: 55 %
Wheelbase: 94.0 in.
Tire section width: 205 mm.
Tire circumference: ft.
Wheel diameter: 15 in.
Tire profile: 60 %
Coefficient of drag: 0.40
Frontal area: sq.ft.
Overall height: 47.0 in.
Overall width: 68.0 in.
Ground clearance: 5.0 in.

TVR 350
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GENERAL PARAMETERS

Air Temperature: 65 deg. F.
Barometric Pressure: 29.38 in. Hg.
Relative Humidity: 55 %
Elevation above Reference: 0 ft.
Headwind (+), Tailwind (-): 0 mph
Road Grade (+=Ascend, -=Descend): 0 %
Shift Time, Manual: 0.50 sec.
Shift Time, Auto: 0.30 sec.
Engage Time, Manual: 0.20 sec.
Engage Time, Auto: 0.10 sec.
Clutch Slip Max. Time, Manual: 5.00 sec.
Brake Release Time at Start, Auto: 0.10 sec.
Trans. Engage Method-Lin,Prog,Regr: R
Shift @ O=Optimum, R=Redline, D=Driver: O
Engine Free Decel Rate: 2000 rpm/sec
Engine Bog Down Decel Rate: 4000 rpm/sec
Engine Wheelspin Decel Rate, Manual: 500 rpm/sec
Engine Clutch Slip Decel Rate, Man.: 250 rpm/sec
Engine Trans. Slip Accel Rate, Auto: 750 rpm/sec
Engine Wheelspin Accel Rate, Auto: 250 rpm/sec
Max. Coefficient of Static Friction: 1.00
Max. Coefficient of Kinetic Friction: 0.85
Coefficient of Rolling Resistance: 0.013
Tire Expansion Factor: 0.020 %/mph
Hot Tire Pressure: 35 p.s.i.
Tire Tread to Section Width Ratio: 90.0 %
Wheel and Tire Weight: 45 lb.
Minimum Engine Speed: 700 rpm
Zero h.p. Engine Speed: 600 rpm
Turbo Start Speed: 3000 rpm
Max. Torque Conv. Slack Until, Auto: 2000 rpm
Low Max. Brake Torque Speed, Auto: 2000 rpm
Time Increment: 0.05 sec.
Start Time after Car Moves: 1.00 ft.
Mechanical Losses-Auxiliaries: 2.00 %
Mechanical Losses-Manual Trans.: 6.00 %
Mechanical Losses-Auto Trans.: 8.00 %
Mechanical Losses-Differential: 4.00 %
Mechanical Losses-Axles & Shafts: 5.00 %
Mechanical Losses-Torque Converter: 3.00 %
Max. Clutch Slip Losses, Manual: 10.00 %
Max. Trans. Slip Losses, Auto: 15.00 %
Max. Torq. Conv. Torque Multiplier: 2.25
Effective Engine Radius: 3.0 in.
Drive Shaft Radius: 1.0 in.
Center of Gravity from bottom: 30.0 %
Graphics Aspect Ratio (EGA): 0.75
Graphics Aspect Ratio (VGA): 1.00
Sound Effects (Y=Yes, N=No): Y

TVR 350
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STANDING START ACCELERATION RESULTS

Starting engine speed: 1800 rpm
Starting gear: 1st

Optimum Shift Points:
1st: 6000 rpm @ 37 mph
2nd: 5870 rpm @ 59 mph
3rd: 5700 rpm @ 86 mph
4th: 5460 rpm @ 116 mph

Time to Speed:
0- 30 mph............ 1.8 sec.
0- 40 mph............ 3.2 sec.
0- 50 mph............ 4.1 sec.
0- 60 mph............ 5.9 sec.
0- 70 mph............ 7.3 sec.
0- 80 mph............ 9.0 sec.
0- 90 mph............ 11.9 sec.
0-100 mph............ 14.5 sec.

Time to Distance:
0- 100 ft............ 2.9 sec.
0- 500 ft............ 7.7 sec.
0-1320 ft.(1/4 mile). 14.2 sec.
@ 98.7 mph

Top Speed............. 138.5 mph

[redwedge5]

Looks very impressive but what exactly is Cartest - excuse the ignorance

[cuneus]

It's a simulation program which comes with a few cars data, You can then put your own in (as I did with the 350) and it produce graphs of standing/rolling acceleration, torque, horsepower, launch methods etc (I just ouput the data to a file)

[rev-erend]

It's DOS based .. I've had it for year's ..

Just type in cartest in a search engine and down load a copy. Hours of fun tinkering..

[cuneus]

Keep up at the back, there's a shiny twiddly version now (but you have to pay for it)

[tallbloke]

What happened to 5th gear?

[waynester]

tallbloke said:

What happened to 5th gear?

I think it's showing the optimum rpm to change up at? If your in 5th..no more gears, or do you have more.?

I could be wrong..it's been known

[tallbloke]

waynester said:

tallbloke said: What happened to 5th gear? I think it's showing the optimum rpm to change up at? If your in 5th..no more gears, or do you have more.? I could be wrong..it's been known

Ah, I see. Silly me.