Quote:
Originally Posted by jrider36
I was wondering if you rev match with the pdk transmission. I was also wondering what is rev matching? Of course I have researched the topic but I have never gotten my head completely around it. My experience with a traditional manual is very limited. I find myself shifting about 90% of the time and would consider purchasing a manual in the future. For now, I love the freedom to shift when I want...
Thanks,
Justin R.
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Rev matching is moderating the engine speed so the engine output shaft and the transmission input shaft are at nearly the same RPM when the clutch is engaged. This will minimize clutch slippage, wear, and help keep the car balanced.
Most drivers tend to do this already somewhat naturally on upshifts by moderating the throttle in the middle of the upshift to ensure that the clutch engagement to the next higher gear is smooth. For example, when shifting up at high RPM's, the driver will naturally give the engine more throttle when engaging the clutch for the next gear.
Rev matching is doing the same thing for downshifts - especially if you want to keep the rev's in the upper range through a corner (instead of letting the rev's fall to idle or nearly idle). The tricky part is that the driver is usually also braking at the same time - thus the technique known as "heel and toe" is used to brake and perform a rev-matched downshift at the same time.
PDK transmissions can do the rev matching for you. After receiving the signal to downshift, the computer matches the engine speed to the transmission speed and smoothly performs the shift.