NYT article - GM cylinder dropping

[Ron Schroeder]

At 09:11 AM 5/30/01 -0400, you wrote:
>Hope it's a bit more sophisticated than that.  Shortening the lifters means
>both valves are closed (non-OHC engine) which equals massive pumping losses.
>(Try pulling one plug wire and then go check your mileage.)  Seems like they
>meant to say it "telescopes" the intake lifter but expands the exhaust
>lifter so the exhaust valve stays open all the time.  Don't think you'd want
>to leave BOTH valves open all the time.  Although, may create an interesting
>EGR effect.  :-)
>
>Steve


The lowest losses are with both valves closed.  The energy it takes to
compress the air in the upstroke is mostly released on the downstroke.

Ron Schroeder
WD8CDH
E. E. S.
wd8cdh at bnl.gov
rjs at bnl.gov
ron at 112motors.com
631 344-4561 Day
631 286-5677 Nite
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