![]() ![]() We also do not power shift, which is keeping your right foot pinned while completing a shift. It is up to the tester to determine the best launch technique, and this process can mean that some cars (for example, a launch-control-equipped Porsche 911) require just two or three launches to get the best possible time. Conventional automatics may only require five launches. High-power, rear-wheel-drive cars equipped with manual transmissions are the most time-consuming, and finding the sweet spot of balancing wheelspin and clutch engagement (usually in the 3000-to-4000-rpm range, but it varies depending on the car) may take 10 runs or more.Īll of our straight-line acceleration results are the average of the best run in opposite directions, to account for wind. #Download toad diagnostic software manual Ambient weather conditions-we record absolute barometric pressure and wet- and dry-bulb temperatures trackside-determine how much power an engine makes. ![]() Because of that, we also correct acceleration results to 60 degrees Fahrenheit at sea level. #Download toad diagnostic software fullĬooler air is denser and contains more oxygen, allowing the engine to burn more fuel and make more power. ![]()
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