ArcticC7

This is the one feature GM has been quiet about and it kinda worries me a bit.

gthal

If you are referring to AFM then GM said it is only "on" when in Eco mode. Touring, sport and track modes turn off the cylinder deactivation. I believe RC reported this after the Bash.

Therefore, it is essentially irrelevant unless you want to drive around in Eco mode.

Kappa

Nope the C7 is in 4 cylinder mode until 6000rpm. Your worst fears are confirmed. Now you can find something else to question the C7 team about.

LT1_E85_Corvette

Government Motors can use satellites to take away your displacement... be afraid, be very afraid

gthal

You guys had way more interesting replies than mine

ArcticC7

Oh this is good then as long as it can be turned off.

DAFFYDRUNK

On the G8s at least it could be tuned out permanently. I figure this will be the case of the LT1 once the tune is cracked. Otherwise, on the G8 I think you have to put the shifter in sport mode every time you start the car. Figure the new corvette will start out with it enabled by default everytime you start it?

-CM-

I'll bet that the last setting is retained, just like seat settings. Since the various parameters are user-configurable, it doesn't make sense not to retain them.

jschindler

I'll bet that it defaults to being on when the car is started. You have to remember that this is how they get their EPA fuel economy ratings which contribute to the CAFE ratings. There are strict guidelines on how anything that effects the CAFE rating is implemented.

jim2092

RC reported that it defaults to the Touring setting which does not have AFM.

Glenmcp

I believe this is the correct answer.

elegant

Fact, per Tadge Juetcher and Harlan Charles at the Bash, you can select, via the driver selector mode, e.g., sport and track modes which do not have AFM component, and you can also "latch" other choices via the driver information center to avoid the AFM mode -- and latched information stays the operating/default mode, even when the vehicle is turned off and the re-started.

However, have those who are complaining about AFM even driven a current vehicle which has it? I just drove my buddies' 2012 Ram with a Hemi which has AFM, and other than the little symbol coming up on the instrument cluster telling me when it went into four cylinder mode, I tried but could not tell when the motor went into four cylinder mode.

Oh yes, more complaining about stuff we have prejudices about, but haven't tried, and certainly haven't tried on the C7. Why don't we complain about upcoming "problems", as many did on this forum, such as the previously wrong info in a major car magazine that the C7 will start at $60k.

pewter99

my neighbor who has a GM truck with this "feature" says his truck hardly ever goes into ECO mode unless he is cruising down the highway at 70 or 80

He is a retired GM guy in his 70's and buys a new truck every year says this one drives like all the rest. I drove it twice and I couldn't tell you if I experienced ECO mode or not but I didn't see any lights come on or any change in performance at any point.

Glenmcp

So, you want fact over guess work. What a concept.

jim2092

"They are all configurable individually, or as one! So, the mode switch can change suspension, cluster and hud all as one, or you can have weather mode on, with touring cluster and track mode hud.

And....it doesnt default to ECONO MODE...DOES NOT! you can essentially turn off afm and never hear from it again!. The word I got was that the car defaults to touring mode, which doesnt use AFM. You need to choose to use the afm."


The above is copied from RC000E thread on his complete Bash information.

Shurshot

No more running from the po po

msm859

Actually my understanding is it is very simply to turn it off. Step on the gas and all cylinders will fire.
Otherwise, I would be happy to set cruise control at 70 mph and get better gas mileage.

talon90

The only time it will come in to play is when you are in ECO mode on the Driver's mode selector switch. Stay out of ECO and you will not have to concern yourself with the cylinder deactivation.

Dominic Toretto

This is very good information. So now I officially have no gripes about the C7, as this was my only one. Very good. Time to start selling crack.

-Alex

ed1

And that is why it there!!! I'm not sure why people are complaining about getting better MPG's when rolling down the highway with the cruise set.