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Author Topic: Is there a way to let the engine rev up a few ms when pressing the clutch?  (Read 15026 times)
black
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Is there a way to let the engine rev up a few ms when pressing the clutch?

--> from 0:18 http://www.youtube.com/watch?v=cxkYAKIS7to
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adam-
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Is that not him just blipping?
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userpike
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Is there a way to let the engine rev up a few ms when pressing the clutch?

--> from 0:18 http://www.youtube.com/watch?v=cxkYAKIS7to

ms = ?
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adam-
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milliseconds?
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black
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Is that not him just blipping?

no he's not... 

ms = milliseconds, yes
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userpike
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Is there a way to let the engine rev up a few ms when pressing the clutch?

--> from 0:18 http://www.youtube.com/watch?v=cxkYAKIS7to



I think the Audi S3 had/s this. I saw it on a car TV show once..

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littco
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I think the Audi S3 had/s this. I saw it on a car TV show once..



Audi a4 1.8t Quattro avant has this..

Bloody annoying if you ask me, I thought it was a fault initially, changed clutch switch, brake switch still did it.. Tried a later map and it was gone.. Never bothered to look into why it happened it..
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userpike
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Audi a4 1.8t Quattro avant has this..

Bloody annoying if you ask me, I thought it was a fault initially, changed clutch switch, brake switch still did it.. Tried a later map and it was gone.. Never bothered to look into why it happened it..


if I remember correctly it was supposed to help with getting into the next gear faster.
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black
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if I remember correctly it was supposed to help with getting into the next gear faster.

thats my thoughts but the RS4 in the Video is doing this without any software modification and there is no hardware fault...  Huh

is this a standard feature in OEM RS4 data??
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MadCow
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if I remember correctly it was supposed to help with getting into the next gear faster.

Maybe I'm looking at this backwards, but wouldn't you want the RPMs to drop as fast as possible if you're upshifting?
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black
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« Reply #10 on: October 31, 2013, 12:19:30 PM »

Maybe I'm looking at this backwards, but wouldn't you want the RPMs to drop as fast as possible if you're upshifting?

No, the RPS should not drop to prevent lag when shifting...

in ME7 there is a MAP called KFTVSA - Retard time for overrun fuel cut-off. This MAP is forbidding overrun fuel cut for a given time when clutch is pressed for shifting. But I don't think this is the reason for the behaviour in the video.
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userpike
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« Reply #11 on: October 31, 2013, 08:01:34 PM »

Maybe I'm looking at this backwards, but wouldn't you want the RPMs to drop as fast as possible if you're upshifting?


you want the trans input shaft assembly rpm to, yes. But only to the rpm of the next gear.

As long as the clutch assembly is funtioning properly, engine rpm doesn't matter until you are ready to engage the clutch.



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black
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« Reply #12 on: November 01, 2013, 02:04:41 AM »

at 0:45 you can see it again in another car... a little jump of RPM when pressing the clutch

http://www.youtube.com/watch?v=q5xrZ_xqVxY

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userpike
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« Reply #13 on: November 04, 2013, 11:52:20 PM »

at 0:45 you can see it again in another car... a little jump of RPM when pressing the clutch

http://www.youtube.com/watch?v=q5xrZ_xqVxY



It seems the driver is shifting with "manualauto" mode. I don't think there is a clutch in this vehicle.
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black
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« Reply #14 on: November 06, 2013, 06:15:05 AM »

It seems the driver is shifting with "manualauto" mode. I don't think there is a clutch in this vehicle.

Nope, I know it is OEM 6-gears...
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