NYT article - GM cylinder dropping

[Len Sabatine]

     Rhoads Lifters. They Loose approx 10d and .010 lift below 3K Rpm.
     Len

>Sounds a lot like the variable-rate lifters that have been made by a hi-po
>parts company for many years!  Can't remember who offhand.. Was it
>Crower?
>
>As long as we're OT, why didn't the original attempt at the 4-6-8 cylinder
>engine work?  Seems like a great idea to me.. Should allow the motor to
>run at higher cylinder pressures through the operating range.  Seems like
>other than added ECM complexity, there wouldn't be any other drawbacks
>that I could think off offhand!
>
>
>On Wed, 30 May 2001, Bob Valentine wrote:
>
> > Not exactly EFI related, but GM related.
> >
> > New York Times, Business section, 5/29/01 article says GM is in concept
> > with a new version of the 1981 "4-6-8" motor in trucks which alternates
> > between 8 and 4, no 6 due to vibrational problems.    Says a 8 to 10%
> > increaes in fuel efficiency.
> >
> > "In the new version, an electronically controlled hydraulic system, which
> > uses ordinary engine oil, is used to alter the lifters...   The lifters
> > shorten themselves by telescoping, thus closing off the valves".
> >
> > -> Bob Valentine
> > -> bob at tecmark.com
> >
> >
> >
> > 
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>
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