Shifting...opinions
05-18-2004, 01:11 PM
#1
New Member
Thread Starter
Join Date: Jan 2004
Posts: 108
Likes: 0
Received 0 Likes
on
0 Posts
Shifting...opinions
Love the car! Still trying to get consistent smooth up and downshifts, though. While every now and then a perfectly smooth one will grace me with its presence, mostly I'm still jerking around.
Anyway, after reading some things on this board, I started shifting without lifting the throttle, aka "powershifting". Wow! Shifts are much smoother across the board, almost like an automatic!
However, more research has unearthed numerous warnings about powershifting...not good for the driveline, tranny killer, only for the pros, etc.
Opinions, please...
Anyway, after reading some things on this board, I started shifting without lifting the throttle, aka "powershifting". Wow! Shifts are much smoother across the board, almost like an automatic!
However, more research has unearthed numerous warnings about powershifting...not good for the driveline, tranny killer, only for the pros, etc.
Opinions, please...
05-18-2004, 01:18 PM
#3
Junior Member
Join Date: Jan 2004
Posts: 626
Likes: 0
Received 0 Likes
on
0 Posts
Powershift concerns usually come when you're...
running the 1/4 mile and have the accelerator to the floor. If you're just holding the accelerator where it is and shifting, you should be okay. You're not seeing your revs shoot too high, right?
I usually back off the accelerator just a touch while pressing the clutch, but not enough to drop the revs below my "target" revs (for the next gear).
I usually back off the accelerator just a touch while pressing the clutch, but not enough to drop the revs below my "target" revs (for the next gear).
05-18-2004, 01:29 PM
#5
Junior Member
Join Date: Jan 2004
Posts: 626
Likes: 0
Received 0 Likes
on
0 Posts
They hang on the way down and delay on the way back up (DBW)
If you shift fast enough to benefit from the hang, you're in great shape. If you are shifting slow and the revs drop below your target revs (for the next gear) when you press the accelerator to rev match, the delay causes a "jerky" shift.
05-18-2004, 01:41 PM
#7
AudiWorld Senior Member
Join Date: Mar 2004
Posts: 1,381
Likes: 0
Received 0 Likes
on
0 Posts
Holding the throttle pedal steady while upshifting is NOT powershifting
Holding it to the floor is! 
Actually, this technique yields <i>very</i> smooth upshifts for me. I don't seem to have DBW issues as pronounced as some of the people here have - my revs drop like a rock the moment I lift off the throttle, so I keep steady pressure on the throttle until the clutch is coming back up.
Actually, this technique yields <i>very</i> smooth upshifts for me. I don't seem to have DBW issues as pronounced as some of the people here have - my revs drop like a rock the moment I lift off the throttle, so I keep steady pressure on the throttle until the clutch is coming back up.
Trending Topics
05-18-2004, 01:48 PM
#8
Elder Member
Join Date: Oct 2002
Posts: 15,592
Likes: 0
Received 0 Likes
on
0 Posts
I wouldn't do it. (powershift)
too much going on in my head that I'd screw it up anyway. i tried it a few times and I just couldn't hit 3rd. If I drive "normally" (just quick shifts) I tend to keep my momentum and the car flies.
I have been warned by too many techs in the know NOT to powershift. They say the trannies can take all the power you can give it (chip it, downpipes, even some boost...) but that they CANNOT take the powershifts. They recommend letting each gear set before applying power.
I have been warned by too many techs in the know NOT to powershift. They say the trannies can take all the power you can give it (chip it, downpipes, even some boost...) but that they CANNOT take the powershifts. They recommend letting each gear set before applying power.
05-18-2004, 02:18 PM
#9
AudiWorld Member
Join Date: Jan 2004
Posts: 385
Likes: 0
Received 0 Likes
on
0 Posts
Just like others have said, this isn't power shifting...
Holding the throttle steady while quickly shifting results in no jump in rpm as the engine becomes unloaded due to the clutch disengagement. The engine speed actually remains constant or slightly drops. It's a very odd feeling being this is my first DBW car.
Now if you do this in a mechanical throttle linkage engine, you will see the rpm rise because that's the only choice, at which point the engine and driveline get a shock as you re-engage the clutch that's proportional to the speed differential. THAT is what isn't good for longevity.
Now if you do this in a mechanical throttle linkage engine, you will see the rpm rise because that's the only choice, at which point the engine and driveline get a shock as you re-engage the clutch that's proportional to the speed differential. THAT is what isn't good for longevity.