Warm up PDK from cold start?

6218 Views 13 Replies 9 Participants Last post by greywing, Apr 5, 2019

aeronca65tl

Discussion Starter · Apr 2, 2019 (Edited)

I generally warm up most of our normal cars for 30 seconds or so. Within that time (if temps are moderate out) the fast idle motor will drop RPM to a reasonable speed. This applies to our GMC van or my wife's Honda. I know it's always best to warm up the car by driving it away as soon as possible but I hate putting a car in Drive when the engine is spinning around 1500 RPM....hence the 30 second wait,

[none of this applies to our antique British cars- they work better is I fiddle with the manual chokes and manage the throttle for several minutes]

But what to do with a PDK Porsche? I'm not talking about the manual gearbox here.

Again, I hate the idea of putting my Cayman in Drive if it's cold and turning 1300 RPM or so. Especially since it doesn't have a torque convertor (so all the "creep" is created by clutch slipping). So for now, I patiently wait for 90 seconds or so (when idle speed finally drops) and then I drive off. By the way, I never try to get the RPM to drop by "tapping" the throttle. The guys at PEC told me that's a waste of time and I never thought it was good idea anyway.

Anyone do anything different?

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Calimerus

· #9 · Apr 4, 2019

greywing said:
I don't time it but suspect that after fiddling with seat belts and such, at least 30 seconds has transpired before I push off. WRT the clutch on the PDK it is my perception that as long as the brake pedal is firmly depressed, the clutch remains disengaged. This is certainly the case while at an intersection stop. I intentionally frequently use and appreciate the brake HOLD function at stop signals for that very reason - full dis-engagement of the clutch until ready to proceed when clutch engagement and brake release is initiated by application of the throttle. This is IMO a very well executed function by Porsche engineers.

I use a lot the HOLD function too. I prefer it to leaving the foot on the brake at a red signal stop.

But, it don't think it disengages the clutch, because as soon as you push the gas it moves.

If I've to stay a lot instead, I put into neutral pushing both PDK paddles.

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Calimerus

· #13 · Apr 5, 2019

GregW said:
On my car engaging the HOLD changes the rpm briefly (up) so I'm assuming something is disengaged.

If it worked like this, then it would be even better for the clutch.

In any case, it's the best automatic transmission I've ever tried

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