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Old 06-05-2008, 05:29 PM   #11
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P&G and acceleration.

So if I understand right, experience shows it's most efficient to use the following two modes?

A P&G mode: Shift from N into 4th or 5th gear and floor the accelerator with a led foot (or close to that at 80%). That uses WOT with low engine RPMs to accelerate the car.

B Red light mode: Accelerating from a stop, use light acceleration (feather foot on pedal), and shift early (say around 2000rpm) until you reach coasting speed.

C alternative to B?: For starting from a stop light, we could also do this: 1st, 2nd with light acceleration and a 2000RPM shift. Then skip 3rd, and go directly to 4th gear (or 5th?), and use a hard acceleration but with low RPMs. Is that what you guys are doing?

I suspect the trick is we need the RPMs for 4th gear to be at least the minimum bearable for the engine, so for starters, the RPMs must be at least 1200 when getting into 4th gear.


Automatic: For A/T cars the above seems hard to achieve. as a kickdown will downshift, and a semi hard acceleration will lazilly shift up.
So that should allow you to do (A) and (B), but harder to do (C), unless you have a good pedal feel and can hear when you're in top gear.

The difference between (A) and (B) mode in terms of the driver is that in P&G, he would depress the pedal more than when he accelerates from a red light...

Did I get it right?
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