Quote:
Originally Posted by piyoimut
can you ellaborate? I mean.. how do you rev-match when the gear is always engaged?
from what I see.. is that you downshifted, the engine revved-up(while the car also jerks, throwing balance off).. and yes, you're at the lower gear and ready to go.. I can see this from 4th gear to 3rd..
but what if the turn is so sharp, you brake hard, want to go from 4th to 2nd while rev-matching so on the exit you're close to the limit of 6-7K RPM?
or maybe on a road course.. you have to just brake hard.. then when it's slow enough, press the "-" twice to go down from 4th gear to 2nd gear.. and press on from there..
that could work.. but.. it'll take some habits to do..
I'd rather put the gear to neutral, heel-toe to rev-match while braking.. and exit.
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I am guessing that Kevin is saying that while the trans is in the
process of downshifting from one gear to another, he hits the gas and tries to duplicate the sound and feel of a downshift in a manual trans.
The auto trans duplicates the gear changes of a manual through the use of the torque converter instead of clutch, hydraulic valves and clutch plates to engage whatever gear is selected by the gear shift.
By pretending to match revs in an auto trans downshift, you accomplish nothing except to accelerate wear on the auto trans parts.
The only reason that anyone revs the engine between gears in downshifting a manual trans is to save wear on the clutch, by matching flywheel rpm to the approximate rpm that the next lower gear will demand from the engine. Less clutch slipping = less clutch wear.
None of this matters or is possible with OUR auto transmissions, and pretending that that's what you are doing is like imitating the sound of a Hemi V-8. Your imitation might be good, but you don't have one.