![]() ![]() While it may create a slight extra surge of power in the moment, there are really zero actual benefits for not engaging the clutch pedal when shifting. That is, match the wheel speed to the transmission speed. Without using the clutch, the driver is asking the synchronizer to do a job it's not supposed to do. No-lift shifting is really bad for a pretty straightforward reason. We'll separate the topics into two categories: no-lift shifting and "power shifting." Jason Fenske of Engineering Explained tells us all about the issues the process causes in a new episode. Long story short, it's a really bad idea. This is highly gearbox and car specific, 75-100% is common.You may have heard the term before: "no-lift shifting." It's the process of foregoing the clutch altogether and simply popping the car into the next gear. 90% means 90 out of every 100 sparks are cut, effectively a torque reduction of 90%. Less powerful cars will need little, more powerful cars may need the power brought back in slower.ĭriven upshift cut - this is the percentage cut applied. Often less in higher gears.ĭriven upshift Torque introduction time - this is how slowly the cut is removed once it has timed out. Around 200-250ms is common for a synchro gear box. Its setting will depend how far down the pedal travel your switch activates.ĭriven upshift torque reduction time - This is how long the cut is applied for. Start shift validation - this is how long the clutch switch needs to be active for before the shift cut is initiated. You may have to wire the clutch switch to its own input. Note, I think the factory clutch switch on DI6 is in series with the brake switch (for cruise control cancel) so wont be any good for gear shift. ![]()
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