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Registered
Join Date: Apr 2003
Location: Sweden
Posts: 186
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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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/ Porsche 924 Turbo -1979. Two coloured (original). http://www.geocities.com/Pipeline/Valley/3424/porsche |
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02-20-2004, 06:15 AM
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Join Date: Mar 2003
Location: West Haven, Connecticut
Posts: 812
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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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-2002.5 GTI VR6 24V 6SPD -Kalahari Beige 89 Porsche 944S2 -87 VW GTI 1.8 16v -2007 Ford PIMP(free)star ...company car.... -1999.5 Jetta VR6 Last edited by TheCooler; 02-20-2004 at 06:23 AM.. |
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02-20-2004, 06:21 AM
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Compression/Computer control
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"We are the music makers and we are the dreamers of the dreams" -Willy Wonka |
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02-20-2004, 06:39 AM
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Join Date: Jan 2004
Location: Falls Church, VA
Posts: 1,177
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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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1988 944... and a bunch of other cars 
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02-20-2004, 06:46 AM
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Burn the fire.
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Timing
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[x] Working | [_] Broken: 2017 Victory Octane [x] Working | [_] Broken: 2005 Ram 1500 SLT w/5.7L Hemi "Drive it like you stole it." |
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02-20-2004, 11:49 AM
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2017 Victory Octane
2005 Dodge Ram 1500 SLT
