Struggling with PDK

Struggling with PDK

Author
Discussion

braddo

10,399 posts

187 months

Friday 30th December 2016
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Maxym said:
...

BTW, does anyone else find (pretty much) perfect rev matching on H&T these days more difficult than in the past? I'm thinking it's to do with the lack of direct throttle linkages these days. There doesn't seem the sensitivity. What do you reckon? Is it just my old age?
I agree with you. Cars with drive by wire throttles seem quite a bit less sensitive/responsive to a blip.

blueg33

35,590 posts

223 months

Friday 30th December 2016
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braddo said:
Maxym said:
...

BTW, does anyone else find (pretty much) perfect rev matching on H&T these days more difficult than in the past? I'm thinking it's to do with the lack of direct throttle linkages these days. There doesn't seem the sensitivity. What do you reckon? Is it just my old age?
I agree with you. Cars with drive by wire throttles seem quite a bit less sensitive/responsive to a blip.
I find its not drive by wire as much as pedal position, I heel and toe with the side of my foot blipping the throttle, worked fine in the Evora, impossible in the V8v, also the Aston had slow throttle response that made it even harder

av185

18,434 posts

126 months

Friday 30th December 2016
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rob.kellock said:
Cheers matey!!

Meanwhile, white Cars are better than blue ones. Discuss.

laugh
28% of new vehicles in 2016 were white. (including the ubiquitous white van hehe)

Apparantly.

So this could mean white is the 'best' colour.

e8_pack

1,384 posts

180 months

Friday 30th December 2016
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One of the better threads recently though, its nice to know the pack mentality is alive and well on PH.

Look forward to the next installment on loud shouting.

e8_pack

1,384 posts

180 months

Saturday 31st December 2016
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Continued here, see what the riff raff think:

http://www.pistonheads.com/gassing/topic.asp?h=0&a...


mollytherocker

14,365 posts

208 months

Sunday 8th January 2017
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Check this new gadget out for people who cant operate a throttle correctly!


BertBert

18,955 posts

210 months

Sunday 8th January 2017
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Invented by Prof Pat Pending!

SV_WDC

679 posts

88 months

Sunday 15th January 2017
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Can anyone with PDK tell me if when in manual mode the car will automatically go up a gear if you are too far into the red?

My fear is exceeding the rev range. In my mate's Z4 the gearbox takes over at the optimum rev range thus preventing you from exceeding the rev range.

Unfortunately this was not something I was able to confirm on my test drive.

ATTAK Z

10,599 posts

188 months

Sunday 15th January 2017
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SV_WDC said:
Can anyone with PDK tell me if when in manual mode the car will automatically go up a gear if you are too far into the red?
Yes it does

trawler

178 posts

194 months

Sunday 15th January 2017
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I look forward to reading the replies to this latest question on manual PDK.

av185

18,434 posts

126 months

Sunday 15th January 2017
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SV_WDC said:
Can anyone with PDK tell me if when in manual mode the car will automatically go up a gear if you are too far into the red?

It is designed to but there have been instances of overevved engines with PDK cars despite people saying it is not possible.

The other possible scenario when it would be possible to over rev is when descending a steep hill in a low gear and the gradient and increased engine speed exceeds the limit.

mollytherocker

14,365 posts

208 months

Sunday 15th January 2017
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av185 said:
It is designed to but there have been instances of overevved engines with PDK cars despite people saying it is not possible.

The other possible scenario when it would be possible to over rev is when descending a steep hill in a low gear and the gradient and increased engine speed exceeds the limit.
Its possible.

But surely managing to over rev a PDK box takes a special kind of stupid?biggrin

Paul_M3

2,356 posts

184 months

Monday 16th January 2017
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ATTAK Z said:
SV_WDC said:
Can anyone with PDK tell me if when in manual mode the car will automatically go up a gear if you are too far into the red?
Yes it does
It won't go up a gear if you're simply accelerating up through the rev range. It will let you sit there bouncing off the rev limiter. But that's not a problem as that's obviously what the rev limiter is for whether manual or PDK)

The difference with PDK (and the main cause of over-revs in manuals) is when trying to change down a gear.

If you were say in 3rd at 7000 rpm and tried to change down to 2nd, it won't let you. It will only change down if the resultant revs are below the value of the limiter.

In short, you'd be doing bloody well to over-rev a PDK even if it is theoretically possible.

ATTAK Z

10,599 posts

188 months

Monday 16th January 2017
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Paul_M3 said:
ATTAK Z said:
SV_WDC said:
Can anyone with PDK tell me if when in manual mode the car will automatically go up a gear if you are too far into the red?
Yes it does
It won't go up a gear if you're simply accelerating up through the rev range. It will let you sit there bouncing off the rev limiter. But that's not a problem as that's obviously what the rev limiter is for whether manual or PDK)

The difference with PDK (and the main cause of over-revs in manuals) is when trying to change down a gear.

If you were say in 3rd at 7000 rpm and tried to change down to 2nd, it won't let you. It will only change down if the resultant revs are below the value of the limiter.

In short, you'd be doing bloody well to over-rev a PDK even if it is theoretically possible.
My bad, I was getting mixed up with my DB9

Magic919

14,126 posts

200 months

Monday 16th January 2017
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You only see range 1 and 2 over revs on PDK.

av185

18,434 posts

126 months

Monday 16th January 2017
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mollytherocker said:
Its possible.

But surely managing to over rev a PDK box takes a special kind of stupid?biggrin
Very true.

Intelligence has its limits.

Stupidity does not!

SV_WDC

679 posts

88 months

Tuesday 17th January 2017
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Paul_M3 said:
It won't go up a gear if you're simply accelerating up through the rev range. It will let you sit there bouncing off the rev limiter. But that's not a problem as that's obviously what the rev limiter is for whether manual or PDK)
Maybe I misunderstood, but I thought exceeding the rev range was the same as sitting on the limiter (or anywhere in the red). Is this not the case?



Paul_M3

2,356 posts

184 months

Tuesday 17th January 2017
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SV_WDC said:
Paul_M3 said:
It won't go up a gear if you're simply accelerating up through the rev range. It will let you sit there bouncing off the rev limiter. But that's not a problem as that's obviously what the rev limiter is for whether manual or PDK)
Maybe I misunderstood, but I thought exceeding the rev range was the same as sitting on the limiter (or anywhere in the red). Is this not the case?
The rev limiter is at the beginning of the 'danger zone'. You won't cause any problems by going right up to the limiter before changing gear.

Setting the rev limiter at a point where damage is already occurring would sort of defeat the purpose of having one, no?

Deep

2,064 posts

242 months

Wednesday 25th January 2017
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Somewhere in this thread somebody mentioned that if you hold the left paddle it will drop to the lowest gear possible. I've tried this and nothing happens.

Can anybody confirm whether holding the left paddle should get the PDK to drop to the lowest permissible gear?

Thanks

ATTAK Z

10,599 posts

188 months

Wednesday 25th January 2017
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Deep said:
Somewhere in this thread somebody mentioned that if you hold the left paddle it will drop to the lowest gear possible. I've tried this and nothing happens.

Can anybody confirm whether holding the left paddle should get the PDK to drop to the lowest permissible gear?

Thanks
Yes it works but I'd rather press once for each gear which has the same effect with more control