When RMS fall quickly, there are more hydrocarbons generated. The software makes them fall more slowly via the idle valve opening. Saving the environment i guess...
First dont forget to try and adjust your pedal timing - release the throttle a little sooner. Give the engine a chance to slow it's positive rotational acceleration before it has to head in the negative direction again.
Still not happy? You could try decreasing the rotating mass of the engine (flywheel, fan delete, internals if you are serious), or find a workaround for the software (makbe sharking??). Also, if the AC is on, the extra load makes RPMs fall faster, but of course subrtacts from usable hp.
Edit: Lube the throttle mechanisim and clean the butterfly valve. Check for intake manifold leaks.
'99 323i 5spd
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Last edited by SpooldUp; 09-26-2005 at 12:41 PM.