Measurement

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Lippy
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Postby Lippy » Thu Apr 20, 2006 12:28 am

Thanks Bob! :D :D 8)
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Lippy
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Postby Lippy » Sat Apr 22, 2006 9:19 pm

Ok, there is a point in time when the piston is stopped completely, as I said, At TDC exactly and BDC exactly. Had one friend, check his shortblock with a dial indicator on a piston and a degree wheel, we figured the piston may be stopped on his deal for 3-4deg. Wrong! He checked it 15 times and always came up 1deg, or a little less, need a ten thousandths indicator to figure any closer. Then go from there till ya run out of proper measuring equip.

Another friend says, on a 4in stroke, 5.85 rod engine at 8,000rpm,
It's stopped, approx.. .000002083sec.!!

He said, you can inch down and still only see 0 stopped at 0degrees.

But it HAS TO HAPPEN some point in time. I agree, but it gets pretty involved figuring, cause once you think you have it, then figure rod clearance, oil film strenght ect... Forthe sake of arguement, we'll just say that ,


THE PISTON IS NOT STOPPED VERY LONG :lol: :lol: I'm done. :shock:
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pro70z28
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Postby pro70z28 » Sat Apr 22, 2006 11:23 pm

So since it stops twice on each revolution....000002083sec. here 000002083sec. there. before U know it...........it reeeealy adds up. :D
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jim sanders
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Postby jim sanders » Sun Apr 23, 2006 8:32 am

:shock: if you could really get a slow mo video you would see the piston standing there shuffeling his feet waiting to change directions :roll:

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Lippy
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Postby Lippy » Sun Apr 23, 2006 11:26 am

Probably look like Buddy Epson! :shock:
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jim sanders
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Postby jim sanders » Sun Apr 23, 2006 11:37 am

:lol:

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Lippy
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Postby Lippy » Mon Apr 24, 2006 12:33 am

Ya gotta admit, Buddy was a good shuffler, him and the black guy in that Shirley Temple movie, where they were goin up and down the stairs!!! :lol: 8) 8)
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BillyShope
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Postby BillyShope » Sat Dec 16, 2006 4:36 pm

The answer to your question is: Zero seconds. The "still" position of the piston is no different from its position at any other rotation angle. The connecting rod is merely an extension of the crankshaft throw.


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