Drag Race Simulator for
1/4 mile, 1/8 mile or Top Speed

This simulator was developed by John Bolton with updates by Stan Adams. Default values entered into the simulator were provided by Motorcycle Performance Guide and Stan Adams. The values entered represent a well tuned Stage 1 Evolution or Twin Cam engine in a Dyna or Softtail frame with an 150 pound rider.

You can watch the speed of your vehicle as it accelerates in the lower left hand corner of this window. The summary information for your simulation is displayed in the computational window.

Simulator Notes and User Guide

Engine Data

Max Engine Speed: RPM Rear Wheel Torque (drivetrain torque loss ignored)

Torque (pound-feet)/RPM Pairs
(Default values are from a well tuned stock EVO 80 CID. This is not an average engine.)
  Torque RPM
1
2
3
4
5
  Torque RPM
6
7
8
9
10
  Torque RPM
11
12
13
14
15
  Torque RPM
16
17
18
19
20
Drivetrain

Gear 1 2 3 4 5 6 Axle
Ratio (:1)
Drive Train Torque Loss: %
Clutch Slip Factor:
Chassis/Body

Race Weight: lb Weight on Rear Wheels: % of Race Weight
Center of Gravity Height: in Wheelbase: in
Coefficient of Drag: Cross-Sectional Area: ft2
Tires

Rear Tire Diameter: in
Front Tire Diameter: in
Rear Tire/Wheel Inertia: slug ft^2
Front Tire/Wheel Inertia: slug ft^2
Engine Inertia: slug ft^2
Coefficient of Rolling Friction:
Coefficient of Static Friction:
Environment

Temperature: o F
Barometric Pressure: in Hg
Driving Style

Shift Point
(RPM)
Auto Duration
(ms)
1-2
2-3
3-4
4-5
5-6
Roll Out: in
Launch: RPM


Time
Delta
(ms)
Display
Delta
(ms)
Mode Tower
5
10
25
100
250
500
1/8 mile
1/4 mile
Top speed
Summary Only

Auto Recall of Last Run

Memory
Location
Location Name
1 Last Run
2
3
4


Notes:

Be patient after the results window pops up. This simulator (minus the form) is implemented entirely in client-side JavaScript (your computer executes it). On a 200 MHz Pentium running Netscape Navigator 3+, 1/4 mile results can take 5-10 seconds, while top speed results can take up to 30 seconds or so. Microsoft Explorer may take 2 to 3 times longer.

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© 1998 John A Bolton.
All Rights Reserved.