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Who's Ready For Two-Cylinder Highway Driving?

dynamic skip fire delphi tula dsf

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#1 Gorehamj


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Posted 30 August 2017 - 05:29 PM

SSF delphi.png

John Goreham
Contributing Writer, GM-Trucks.com

Dynamic Skip Fire technology, or DSF, can be used to operate your full-sized GM truck or SUV on the highway using just two cylinders. It with It won't be part of the 2019 GM truck lineup, but it may well appear on the next-generation of pickups. We first heard about it back in 2015 when Automotive News covered it.

The technology is not all-new. It has been in development for years, but it was targeted at a 2020 launch in production vehicles. The clock is ticking down on that date. With most of the easy ways to save fuel already in use, more elaborate technologies like DSF could save the V8. Delphi says it has been proven to reduce fuel economy 21% on a Yukon Denali operating on the EPA test cycle. The cost could be in the low hundreds including the special valves and throttle body parts that enable the technology.

#2 barry G

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Posted 30 August 2017 - 06:47 PM

clever, to ride the balance of linear to rotation, should keep it transparent.


I had one bank of a 3 main liquid boxer dead for two years, thinking it was just "the subaru sound"

old ea82. My very first one. someone told me they were slow, and I just went with it.

No clue.


blew my mind. wasn't even half horsepower, it still had more than half. Went down the highway.

scary slow at times..

I know it can be done for shared rod pin engines.. this has a good answer.


self balance gets away with more...but hey.

Edited by barry G, 30 August 2017 - 06:49 PM.




#3 WLC



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Posted 30 August 2017 - 08:06 PM

Been there! John Deere A and B. Two cyl with large pistons and heavy flywheel. Know one guy who drove to Alaska.

#4 Daryl Z71

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Posted 30 August 2017 - 09:36 PM

Ugh, it never ends.

2006 Silverado Z71


#5 97SierraSLT



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Posted 31 August 2017 - 08:10 AM

it's called "disposable GM engine technology"

#6 diyer2


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Posted 31 August 2017 - 08:24 AM

Works for flat landers. Not so good for mountains. 



Use your head for more than a hat rack.  :seeya: 


#7 mookdoc6


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Posted 31 August 2017 - 12:26 PM

Thanks for Posting Goreham!  I know I will get shot for saying this, "GM saves the V-8 with this technology"  It's that cool and I can keep driving GM V-8's awesome!



And FERD says, "2.7L ecoboost for full size pick up truck" HA>>>HA LOL they can have nonsense!

Edited by mookdoc6, 31 August 2017 - 12:28 PM.

#8 j-ten-ner


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Posted 31 August 2017 - 09:15 PM

Works for flat landers. Not so good for mountains. 



Yup. Second that.


so long


Only three people are allowed to drive my truck.

Me, myself and I. :driving:

...and my wife...

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