[craig66]

Bear with me as question unfolds

I really enjoy a healthy pull off from a light or on the open turnpike when traffic opens up but want to keep my license and so excessive speed is not my game. With a stick shift I would often row from 1 to 3 but if continued onto the natural progression I would likely be significantly exceeding the speed limit and so instead of going to 4 I would move directly to 5th and then essentially coast along at a reasonable speed and 3000 RPM

With a PDK in manual I cant do that and so often find myself rapidly shifting from 3rd to 5th to achieve the same goal with almost no time spent in 4th. Seems to work well but I find that the shift from 4th to 5th often has a real jolt to it as if the car doesn't love the fact that I by passed any real time in 4th. Once in 5th RPMS settle out at around 3K. Same thing happens on the highway after spirited acceleration up to 4th gear and if I then choose to "Skip" 5th and go straight to 6 I tend to feel that jolt

I am used to the jolt with spirited driving but I guess I did not expect it at that point. Does this mean that the car does not love what I am doing. Is the idea of "skipping gears" on PDK in manual reasonable. I don't believe I am lugging the engine as I am usually still at least 3K RPM.

Thanks

 

[LongRanger]

I don’t have an explanation, but since 3rd and 5th share the same clutch, perhaps the rapid shift is preventing the clutch from disengaging quickly enough between gears.

 

[GregW]

Yup--what LongRanger said. It's 'cause you're bypassing the 2-4-6 clutch.

Try automatic and using the paddles to bypass the auto, shifting manually up to 4th and then just stop shifting. The car should smoothly do the 5th gear shift by itself in a few seconds. Or, in manual, shift 1-3 or 1-4 then put the stick into auto position. Or, when you reach your desired speed pull both paddles for a neutral, and then shift to 5 in a few seconds with a single pull.

 

[gatorfast]

Maybe just slow your shifts a little bit. Why the rush from 3rd to 5th? Just let the car naturally move through the gears.

 

[jimmuller]

What they said. When I decide not to go any faster I lift the right foot. It is too easy to go too fast too quickly.

 

[GregW]

What they said. When I decide not to go any faster I lift the right foot. It is too easy to go too fast too quickly.

One day I was headed out just for a ride and ran across a group of 3 doing about 80kph in a 100 zone (50mph in a 60+). I got a nice clear spot and floored it. When I pulled in a few seconds later the speedo was passing 170 (105+). Oops. 😀

 

[Lelandjt]

I don’t have an explanation, but since 3rd and 5th share the same clutch, perhaps the rapid shift is preventing the clutch from disengaging quickly enough between gears.

Close, it hasn't had time to "pre-select" 5th gear yet. 3rd is still the gear attached to that input shaft. The clunk is similar to if you were accelerating up through the gears and then went from 4th backward to 3rd without a deceleration first so it was expecting you to go to 5th and had that cog pre-selected. The clunk is the delay it requires to select that cog and the slight missmatch of engine rpm.
I really want the quick shifting of a dual clutch and the 7th cog but little things like this make me hesitant to give up the control I'm used to with a manual.

 

[craig66]

Thank you all. Definitely gives me a better understanding. Will play around with various options including just cutting back on acceleration and listening to the engine talk to me as the revs drop slowly.