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since October 2005

LAWRENCE TECHNOLOGIES
Brighton, Ontario, Canada

L6B Simulation Results

Computer simulations have been executed using a full aerodynamic model with weight accounting for fluids and 180 pound driver, standard temperature and pressure. The acceleration results are shown below with a previous engine version. Our latest engine (440HP), gear set and tire size has improved performance but it has not differed enough to make an update to this page a priority.

Parameters/assumptions of these results: Engine 401 lb.ft. at 4500 RPM, redline at 6500 RPM. Shift at redline. Start in 2nd gear. Shift time to even gears is 0.35s. Shift time to odd gears is 0.5s. Tire coefficient of friction is 1.10 at 1000 lb load, 1.25 at 0 lb load. Frontal area is 18 sq ft. Air drag coefficient is assumed to be 0.4 (this is conservative, something closer to 0.3 is expected). Drivetrain loss is 15%. The effect of rotational inertia is estimated as a 9% loss in 5th gear and scaled accordingly.

Feature Time (seconds) Acceleration at end of run (g's)
0-30 mph 1.68

0.79 (2nd gear)

0-50 mph 2.83

0.81 (2nd gear)

0-60 mph 3.39

0.79 (2nd gear)

20-70 mph 2.90

0.71 (2nd gear)

0-80 mph 5.33

0.56 (3rd gear)

0-100 mph 7.12

0.46 (3rd gear)

Standing quarter mile 11.5 (126mph)

0.27 (shifting to 5th gear)

Top Speed 18.3 (155mph)

0.15 (at 6500rpm in 5th gear)

Note that the simulation begins in 2nd gear and that the horizontal scale is not compressed
to artificially inflate the apparent acceleration.

 


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