Cylinder deactivation functions
Thread Starter
Melting Slicks
Joined: Nov 2003
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From: Ridgeland MS
St. Jude Donor '06-'07-'08-'09-'10-'11
Cylinder deactivation functions
Does cylinder deactivation function the same in all 5 driving modes? Or is it only in econo mode? I would like some new owners feedback on what they feel as it kicks in and out. Any hesitation and etc?
Thanks
Bil
Thanks
Bil
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St. Jude Donor '05-'06-'07-'10
On a manual transmission car it will only operate in Eco mode and it only comes in to play in fourth gear or above.
The Automatic transmission car is a little different and will come and go as it needs to in Eco mode. I'm not certain about the other modes of operation in the auto.
Speaking specifically to the manual transmission car, I'd have to describe it as yes, you are aware that it comes on (if you are looking for it, you can feel it) but it is not "in your face".
The Automatic transmission car is a little different and will come and go as it needs to in Eco mode. I'm not certain about the other modes of operation in the auto.
Speaking specifically to the manual transmission car, I'd have to describe it as yes, you are aware that it comes on (if you are looking for it, you can feel it) but it is not "in your face".
Le Mans Master
Joined: Feb 2001
Posts: 5,381
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From: Houston TX
Let's see how long it takes before people are pulling fuses to kill the cylinder deactivation, then complain about gas mileage. 
Sounds like an awesome car!!! GM got this one right!
Current MPG of new owners on the highway is at 31.xMPG!
Sounds like an awesome car!!! GM got this one right!
Current MPG of new owners on the highway is at 31.xMPG!
Race Director
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From: Ft Lauderdale
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If it works like the camaro, I ll rip anything I can out...it sucks...but since nobody has complained about jerkiness on the highway so far, I assume it works well.
Instructor
Joined: Feb 2005
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From: Powell Ohio
On a manual transmission car it will only operate in Eco mode and it only comes in to play in fourth gear or above.
The Automatic transmission car is a little different and will come and go as it needs to in Eco mode. I'm not certain about the other modes of operation in the auto.
Speaking specifically to the manual transmission car, I'd have to describe it as yes, you are aware that it comes on (if you are looking for it, you can feel it) but it is not "in your face".
The Automatic transmission car is a little different and will come and go as it needs to in Eco mode. I'm not certain about the other modes of operation in the auto.
Speaking specifically to the manual transmission car, I'd have to describe it as yes, you are aware that it comes on (if you are looking for it, you can feel it) but it is not "in your face".
Melting Slicks
Joined: Dec 2000
Posts: 2,076
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From: San Jose CA
Active Fuel Management (engine cylinder shuts off) 4-Cylinder Mode
. Normal with automatic transmission: The engine uses 8-cylinder mode when accelerating, but changes to 4-cylinder mode when coasting.
. With manual transmission: Active Fuel Management only active in Eco Mode.
. Off in Manual mode with automatic transmission unless in Eco mode.
. Eco keeps the engine in 4-cylinder mode unless heavy acceleration is needed.
. Normal with automatic transmission: The engine uses 8-cylinder mode when accelerating, but changes to 4-cylinder mode when coasting.
. With manual transmission: Active Fuel Management only active in Eco Mode.
. Off in Manual mode with automatic transmission unless in Eco mode.
. Eco keeps the engine in 4-cylinder mode unless heavy acceleration is needed.
Safety Car
Joined: May 2008
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From: Chesapeake VA
I think GM's implementation is perfect. It's there for you to use if you want it. Many feared the car would default start in it and you'd have to turn it off every time you drove the car. With a manual car starting in touring mode you could never see AFM engage the entire life of the car.
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From: Ft Lauderdale
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Owners manual says AFM is off in manual AT mode....(paddle shift)
I'm not concerned about gas mileage so unless it is pretty imperceptible, I'll kill it with a tune or a software module like the Range device.
I'm not concerned about gas mileage so unless it is pretty imperceptible, I'll kill it with a tune or a software module like the Range device.
Last edited by Glen e; Sep 26, 2013 at 01:53 PM.
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Le Mans Master
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From: Houston TX
I had a Dodge Magnum V8 (car not the truck) and would never know it was in 4 cylinder mode unless paying close attention on the highway.
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From: Ft Lauderdale
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Wow... It's still early and not enough time has been spent in the cars. Give it a few months and people might start to notice things from day-to-day use.
I had a Dodge Magnum V8 (car not the truck) and would never know it was in 4 cylinder mode unless paying close attention on the highway.
I had a Dodge Magnum V8 (car not the truck) and would never know it was in 4 cylinder mode unless paying close attention on the highway.
I will know within 10 miles if I like it or not, I've lived with AT AFM for a year now in the v8 camaro.....search the sister site here...it is not liked for good reason.....don't get all defensive, I think the vette will do it much better as nobody even on the reviewer side is bitching....on the camaro on a flat level patch of interstate at 70 mph, the car will jerk like it's going in and out of gear when it activates...and it's incessant.....once every couple minutes as it powers, then coasts.....
Last edited by Glen e; Sep 26, 2013 at 02:42 PM.
Melting Slicks
Joined: Nov 2005
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What bothers me about cylinder deactivation is that my understanding of it is that with the added mass in the lifters, it restricts RPM. If that is true, then we may not see a 7,000 RPM limit again like on the LS7.
Drifting
Joined: Jun 2013
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From: Billings Montana
Drifting
Joined: Jun 2013
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From: Billings Montana
I will know within 10 miles if I like it or not, I've lived with AT AFM for a year now in the v8 camaro.....search the sister site here...it is not liked for good reason.....don't get all defensive, I think the vette will do it much better as nobody even on the reviewer side is bitching....on the camaro on a flat level patch of interstate at 70 mph, the car will jerk like it's going in and out of gear when it activates...and it's incessant.....once every couple minutes as it powers, then coasts.....
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St. Jude Donor '05-'06-'07-'10
Here is an example of the Eco index display:
Also notice in the instant fuel economy display you can see the V4/V8 indication:
Last edited by talon90; Sep 26, 2013 at 03:14 PM.
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camaro discussion here:
http://www.camaro5.com/forums/showthread.php?t=283175
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St. Jude Donor '05-'06-'07-'10
excellent....so Paul..and I'm sure you have driven the 6.2 auto camaro...on a highway that light would go on and off a lot - so much so it feels like someone is tugging the car from the rear - also in town traffic if you step on it there is a hesitation.....can we say those things are reduced/diminished on the Vette system? possible better software code to reduce the transition?
camaro discussion here:
http://www.camaro5.com/forums/showthread.php?t=283175
camaro discussion here:
http://www.camaro5.com/forums/showthread.php?t=283175