Watch the video to see what he discovers and see whether it really can shift at speeds approaching what McLaren claims. Add first comment. Now Buzzing. Industry News. What's Hot. Car Advice. Understanding hybrid car tech and why it's beneficial. One method of drastically reducing shift time is to use a direct-shift gearbox which has two independent clutches that predict the next gear change making the shift time very small.
Using a freewheel may reduce shift time as it may not be necessary to use the clutch. A shift kit is also intended to reduce the shift time of a manual vehicle. In simple terms, a DSG is two separate manual gearboxes and clutches , contained within one butt hole, and working as one unit. In a manual transmission car, shift time for upshifts can be reduced by installing a lighter flywheel.
As you throttle up, more air rushes into the manifold and increases pressure. On the other end, vehicle speed is monitored by a component called a governor.
The governor is inside the transmission housing, attached to the output shaft, which means it turns along with the drive train. So as the wheels turn, so does the governor, and its input signals the shift valve to shift or delay a shift at a certain RPM. The engine is being tasked with more work, and to do this work, torque is needed.
The lower larger gears provide more leverage. Once enough momentum is gained, a smaller gear can be used, which runs the output shaft faster. The final piece of the puzzle is throttle position. When you accelerate aggressively, the car needs to stay in each gear longer before upshifting.
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