Formulas used: ET_¼ ≈ 5.825 × (weight / hp)^(1/3), adjusted to 1/8 with factors; MPH ≈ 234 × (hp / weight)^(1/3) (scaled); 60’ ≈ 0.17 + 0.204 × ET. Real results vary with traction, gearing, aero, weather, driver.