PDK Question
09-20-2009, 12:33 AM
#16
Race Director
It's a Porsche 911, dumbing down the rpm's to that extreme for better mileage is asinying, and disparages a great sports car.
I cannot stand to drive my PDK in Auto mode, not even in traffic, it's pathetic. So, I drive in Manual mode only, gotten used to the controls, and enjoy it.
I cannot stand to drive my PDK in Auto mode, not even in traffic, it's pathetic. So, I drive in Manual mode only, gotten used to the controls, and enjoy it.
I've read that automatics (slush boxes, F1-style and PDK style) shift maps are somewhat are in no smal part driven by the driving cycles used to qualify cars in the EU region and short shifting -- shifting to next higher gear at very low RPMS -- helps the car deliver much better numbers.
Car makers and their drivetrain engineers are gaming the tests with custom shift maps tailored to the tests.
I expect the aftermarket will soon develop/release altered shift maps for these transmissions to do away with the factory maps and bring back some excitement.
Sincerely,
Macster.
09-20-2009, 12:52 AM
#17
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Do not necessarily disagree. That Porsche did it this way just shows you how much pressure it is under to bring down CO2 emissions and improve gas mileage.
I've read that automatics (slush boxes, F1-style and PDK style) shift maps are somewhat are in no smal part driven by the driving cycles used to qualify cars in the EU region and short shifting -- shifting to next higher gear at very low RPMS -- helps the car deliver much better numbers.
Car makers and their drivetrain engineers are gaming the tests with custom shift maps tailored to the tests.
I expect the aftermarket will soon develop/release altered shift maps for these transmissions to do away with the factory maps and bring back some excitement.
Sincerely,
Macster.
I've read that automatics (slush boxes, F1-style and PDK style) shift maps are somewhat are in no smal part driven by the driving cycles used to qualify cars in the EU region and short shifting -- shifting to next higher gear at very low RPMS -- helps the car deliver much better numbers.
Car makers and their drivetrain engineers are gaming the tests with custom shift maps tailored to the tests.
I expect the aftermarket will soon develop/release altered shift maps for these transmissions to do away with the factory maps and bring back some excitement.
Sincerely,
Macster.
I'd bet there are already re-mapping algorithms available, however it's got to be pretty complex to do all that thinking, brake shifts, etc.
09-20-2009, 01:21 AM
#18
Three Wheelin'
"arc sin y" 
- I have looked all over for this and don't see how it applies to our cars - at least at the level a comsumer would understand.
- I have looked all over for this and don't see how it applies to our cars - at least at the level a comsumer would understand.
