NYT article - GM cylinder dropping

[ae2598 at wayne.edu]

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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