Question about PDK delay from dead stop - I'v never had a Porshe or anything like PDK
#1
Question about PDK delay from dead stop - I'v never had a Porshe or anything like PDK
Hi all,
I just got my first Porsche (2009 997.2 S Cab) and it has the PDK transmission. I think it's great, but there seems to be a noticeable delay (maybe .5 seconds) from the time you floor it from a dead stop to the time the car takes off. Is this normal? I do not have the sport/sport+ option but if i added it would it help improve this. TIA
I just got my first Porsche (2009 997.2 S Cab) and it has the PDK transmission. I think it's great, but there seems to be a noticeable delay (maybe .5 seconds) from the time you floor it from a dead stop to the time the car takes off. Is this normal? I do not have the sport/sport+ option but if i added it would it help improve this. TIA
#2
#3
theres several spots that feel funny.
http://forums.rennlist.com/rennforum...dk-tuning.html
http://forums.rennlist.com/rennforum...dk-tuning.html
#4
Without Sport Chrono package, the PDK unit (as well as manual for that matter) does have a softer pedal with a little more delay. With SC in Sport Mode, you have a noticeably more sensitive pedal with much less delay. Sport Plus just puts the car in full-on race mode.
You can now add SC through an orderable option (Suncoast has it here: http://www.suncoastparts.com/product//9X7SM.html).
I've also hear decent feedback about the SprintBooster device. This will also sharpen pedal feel.
You can now add SC through an orderable option (Suncoast has it here: http://www.suncoastparts.com/product//9X7SM.html).
I've also hear decent feedback about the SprintBooster device. This will also sharpen pedal feel.
#6
I just assumed this was the time it took for the clutch to engage after releasing the brake.
With a traditional auto (non-PDK), you can apply power to the wheels right away through the torque converter. But with PDK, the clutch is disengaged when you're at a stop, and it needs to time to engage when you release the brake and start to apply throttle. Is this right?
With a traditional auto (non-PDK), you can apply power to the wheels right away through the torque converter. But with PDK, the clutch is disengaged when you're at a stop, and it needs to time to engage when you release the brake and start to apply throttle. Is this right?
Last edited by gasongasoff; 08-25-2011 at 02:23 PM.
#7
I just assumed this was the time it took for the clutch to engage after releasing the brake.
With a traditional auto (non-PDK), you can apply power to the wheels right away through the torque converter. But with PDK, the clutch is disengaged when you're at a stop, and it needs to time to engage when you release the brake and start to apply throttle. Is this right?
With a traditional auto (non-PDK), you can apply power to the wheels right away through the torque converter. But with PDK, the clutch is disengaged when you're at a stop, and it needs to time to engage when you release the brake and start to apply throttle. Is this right?
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#9
I just assumed this was the time it took for the clutch to engage after releasing the brake.
With a traditional auto (non-PDK), you can apply power to the wheels right away through the torque converter. But with PDK, the clutch is disengaged when you're at a stop, and it needs to time to engage when you release the brake and start to apply throttle. Is this right?
With a traditional auto (non-PDK), you can apply power to the wheels right away through the torque converter. But with PDK, the clutch is disengaged when you're at a stop, and it needs to time to engage when you release the brake and start to apply throttle. Is this right?
I guess I'm thinking automatic instead of Manual tranny.
#10
I just assumed this was the time it took for the clutch to engage after releasing the brake.
With a traditional auto (non-PDK), you can apply power to the wheels right away through the torque converter. But with PDK, the clutch is disengaged when you're at a stop, and it needs to time to engage when you release the brake and start to apply throttle. Is this right?
With a traditional auto (non-PDK), you can apply power to the wheels right away through the torque converter. But with PDK, the clutch is disengaged when you're at a stop, and it needs to time to engage when you release the brake and start to apply throttle. Is this right?
I'll take Tony's word for it regarding the hill feature. With a manual transmission, I've never felt the brakes release at all because it happens so smoothly as I engage the clutch. Of course, we don't have serious hills around here. If the car were holding on a steep slope, I can imagine feeling the transition, but as it is I only know intellectually that the brake is working because I don't have to 'catch' the car from rolling backward. I know that, but I don't feel the car substituting for me.
#11
So... you never back off a sloping driveway? a curb? or what have you? Of course you do, and that's when you feel that transition. I have 10,000 miles of PDK driving, and what I described is what happens.
#12
No, not measurably. As Tony says, the delay will be in the millisecond range. Even if you just lightly touch the throttle, the clutch will engage very quickly. PDK includes "crawl mode" that lets you move away from rest in a parking lot without fully engaging the clutch and thus going too fast.
I'll take Tony's word for it regarding the hill feature. With a manual transmission, I've never felt the brakes release at all because it happens so smoothly as I engage the clutch. Of course, we don't have serious hills around here. If the car were holding on a steep slope, I can imagine feeling the transition, but as it is I only know intellectually that the brake is working because I don't have to 'catch' the car from rolling backward. I know that, but I don't feel the car substituting for me.
I'll take Tony's word for it regarding the hill feature. With a manual transmission, I've never felt the brakes release at all because it happens so smoothly as I engage the clutch. Of course, we don't have serious hills around here. If the car were holding on a steep slope, I can imagine feeling the transition, but as it is I only know intellectually that the brake is working because I don't have to 'catch' the car from rolling backward. I know that, but I don't feel the car substituting for me.
#14
Gary
#15
That sounds right to me, Tony. I'm sure we could program a smoother transition if it seemed important enough, but as has been said, we don't put supercomputers in cars and they need the bandwidth and code space for a lot of demands imposed by the different subsystem designers. This sounds like a desirable, or at least neutral, trait, so they simply don't spend time and computer resources hiding the effect.
Gary
Gary