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Forum: Experiments, Modifications and DIY

12-28-2006, 09:51 AM

Replies: 75

Cylinder Deactivation

Views: 31,166

Posted By onegammyleg

My eyes must be playing tricks on me then ,...

My eyes must be playing tricks on me then , because what I read in that article was --

¨GM estimates fuel economy savings of 8% when driven on the standard fuel economy test routine and up to 25%...

Forum: Experiments, Modifications and DIY

12-28-2006, 01:33 AM

Replies: 75

Cylinder Deactivation

Views: 31,166

Posted By onegammyleg

Your dreaming. ! Removing the mechanical parts...

Your dreaming. !
Removing the mechanical parts and rebalancing is the ulitimate solution if you wish to take that route.
You have no frictional or pumping losses whats so ever.
How can simply...

Forum: Experiments, Modifications and DIY

12-28-2006, 12:47 AM

Replies: 75

Cylinder Deactivation

Views: 31,166

Posted By onegammyleg

The highest figure that I saw was 20% improvement...

The highest figure that I saw was 20% improvement and that was on an suv with a huge engine at steady highway speads under ideal conditions.
It dragged it up to 22mpg , which is still S&/T FE.

I...

Forum: Experiments, Modifications and DIY

12-27-2006, 11:46 PM

Replies: 75

Cylinder Deactivation

Views: 31,166

Posted By onegammyleg

Wrong. ...

Wrong.

https://www.fueleconomy.gov/feg/tech_engine_more.shtml
Potential Efficiency Improvement: 7.5%

https://ezinearticles.com/?Cylinder-Deactivation:-A-Good-Thing?&id=226193
Although...

Forum: Experiments, Modifications and DIY

12-26-2006, 11:50 PM

Replies: 75

Cylinder Deactivation

Views: 31,166

Posted By onegammyleg

I stand by my last post. From what I have...

I stand by my last post.

From what I have read , auto manufacturers deactivate the cylinder after the firing stroke and use the exhaust gas in the chamber as an easily compressable spring.
This...

Forum: Experiments, Modifications and DIY

12-26-2006, 05:17 AM

Replies: 75

Cylinder Deactivation

Views: 31,166

Posted By onegammyleg

If the plug is left in on the downward piston...

If the plug is left in on the downward piston stroke you will create a vacuum above the piston which will draw air from the crankcase into that space.

Piston rings are not good at sealing under...

Forum: Experiments, Modifications and DIY

12-26-2006, 01:25 AM

Replies: 75

Cylinder Deactivation

Views: 31,166

Posted By onegammyleg

You must block off both intake and exhaust ports...

You must block off both intake and exhaust ports and remove the spark plug.
Run the plug holes via threaded pipe into a heavily muffled air cleaner element to stop the sucking sound.

Showing results 1 to 7 of 7

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