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Registered
Join Date: Oct 2001
Location: Westford, MA USA
Posts: 8,852
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I don't think that power cycles matter in this case. We're only interested in one power cycle. If the engine turns over 6000 times in a minute, this is 100 cycles per second. So one rev (aka: 360 degrees) takes .01 seconds. Of this 360 degrees, 270 degrees (270/360 degrees) * .01 seconds would be the time during which the intake valve was open.
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John
'69 911E
"It's a poor craftsman who blames their tools" -- Unknown
"Any suspension -- no matter how poorly designed -- can be made to work reasonably well if you just stop it from moving." -- Colin Chapman
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