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What makes the engine rpm, decrease fast?

What makes the engine RPM decrease fast down, after having rev. it high?
So standing in neutral and just kicking the throttle like a little child; up and down, can you influence the engine to very fast decrease the rpm, after haven hitting it up to ~6-7000?




Maybe there isnt a simple answer for this.
Would there be several answers if the question was raised for a
turbo/non turbo car?
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Old 02-20-2004, 05:15 AM
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First of all that isnt good..and im guessing because of the friction because of more heat? I really dont know exactly ....maybe you got some blowby? I know the single cams spin down a lot faster then duals. My s2s rpm drop half as fast as the SOHCs rpm.
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Last edited by TheCooler; 02-20-2004 at 05:23 AM..
Old 02-20-2004, 05:21 AM
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Old 02-20-2004, 05:39 AM
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Flywheel weight plays a big factor as well. I don't know what the flywheel weight is on a 944 but I know that it revs both up and down a hell of a lot quicker than the V-8 in my old Studebaker (and I'm guessing that the flywheel is the main culprit, as the Stude flywheel is a big heavy cast iron thing.) Makes for much quicker, neater double-clutched downshifts.

nate
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Old 02-20-2004, 05:46 AM
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Old 02-20-2004, 10:49 AM
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