V4 mode
AIR FORCE VETERAN
Joined: Nov 2009
Posts: 6,223
Likes: 441
From: Pennsylvania
I personally wouldn't be concerned about when 4cyl happens when you are in break in time. I'd be more concerned about RPM limits. As for using ECO mode it is much more then just going to 4cly operation. I know the throttle is slower to react and the transmission is not quick to down shift. I am sure there are other parameters.
Last edited by Bill17601; Jun 20, 2016 at 10:38 AM.
Race Director
Joined: May 2008
Posts: 10,742
Likes: 629
From: Manheim Pennsylvania
Yep, use paddle shift with an automatic and take a few long rides on some back roads and get past 500 miles!
Agree with your idea of breaking it in in V8 mode. Also using various rpm's and some deceleration engine braking. That is why I would use more back roads and less interstate.
Did that with my M7 and cruised in 4th, 5th and 6th and changed about every 10 minutes. Frankly in 2 3/4 years I have only used ECO a few times to see how much better the gas mileage was. It was not much! I drive in Sport 95% of the time.
Agree with your idea of breaking it in in V8 mode. Also using various rpm's and some deceleration engine braking. That is why I would use more back roads and less interstate.
Did that with my M7 and cruised in 4th, 5th and 6th and changed about every 10 minutes. Frankly in 2 3/4 years I have only used ECO a few times to see how much better the gas mileage was. It was not much! I drive in Sport 95% of the time.
ECO is a wiz thing. It takes X amount of energy to move a set amount of weight.
AIR FORCE VETERAN
Joined: Nov 2009
Posts: 6,223
Likes: 441
From: Pennsylvania
Your correct about energy and force. The thing that makes the difference is how quickly that energy is applied. A smooth and genial acceleration to say 100 miles an hour uses less fuel fuel the a full throttle drag racing run to 100.
Pro
Joined: Sep 2015
Posts: 558
Likes: 245
From: SW Kansas
Being old school, I guess, I installed a Range Technology device on day one. Couldn't stand the thought of the engine breaking-in irregularly. I've had it in ever since. The loss of gas mileage isn't enough to be concerned with-maybe 2 mpg. The down side of this is that the device pings the computer all the time, even when the engine is off. Let the car sit about three days and if you've forgotten to remove it, you'll have a dead battery. I deal with this by plugging in a cheap battery maintainer which works fine.
Burning Brakes
Joined: Jan 2007
Posts: 1,170
Likes: 86
My wife and I had a G8 that had a AFM lifter go bad and the whole top half of the motor had to be replaced or gone through. I bought a programmer and turned the AFM off. The G8 had an aftermarket exhaust, it sounded horrible every time it went into V4 mode. Plus I had heard stories of higher millage motors that had uneven wear on the cylinders from them being used inconstantly. As someone who is mechanically inclined I think its a horrible idea.
I had the pleasure of meeting one of the engineers for the program and I told him all of the above
I had the pleasure of meeting one of the engineers for the program and I told him all of the above
Safety Car
Joined: Jul 2011
Posts: 4,496
Likes: 1,209
From: Phoenix, Arizona
Race Director
Joined: Sep 2001
Posts: 16,507
Likes: 84
From: Southern Indiana
I put mine in Eco mode just to try it, but could almost never get it to actually switch to V4. What is the max speed for V4 to engage? I was highway driving with little acceleration at normal speeds (~80MPH or so) but couldn't get it to ever switch to V4 unless I slowed way down...
Last edited by xwing; Jun 20, 2016 at 04:25 PM.
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AIR FORCE VETERAN
Joined: Nov 2009
Posts: 6,223
Likes: 441
From: Pennsylvania
I had V4 at 75 MPH driving from Myrtle Beach to Pennsylvania . As long as a lot of torque isn't needed it switches. I have a Z51 A6 and I get 28MPH. I could do better with a higher geared Stingray rather then the lower geared Z. I call them lower and higher because when I learned to drive a stick shift at 16, first gear was considered a low gear ( numerically a larger ratio)
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,937
Likes: 12,351
From: NE South Carolina
I put mine in Eco mode just to try it, but could almost never get it to actually switch to V4. What is the max speed for V4 to engage? I was highway driving with little acceleration at normal speeds (~80MPH or so) but couldn't get it to ever switch to V4 unless I slowed way down...
On a quick look, could not find a specific max speed in the 2014 Service Manual.
Last edited by JerryU; Jun 20, 2016 at 04:58 PM.
Drifting
Joined: Apr 2006
Posts: 1,449
Likes: 770
Also, on the 2016's with A-8, if you are in any mode except track, when the car goes from 8 to 4 cylinders, if you have XM radio you cannot get stations from 1-100 except the NHL Network. If you are in track, same situation, you can get all XM stations except for 1-20. However, if all 8 cylinders are active and you don't have XM, you can get all AM stations and most FM stations, except for those that play only Led Zeppelin. Lastly, if you have an A-8 gear box and the ignition is off, all 8 cylinders are deactivated. The up side is the good gas mileage.
Intermediate
Joined: Mar 2015
Posts: 34
Likes: 1
From: West Central FL
V4 Mode
That is inaccurate information. With the auto transmission, it will go into V4 in any of the modes. The only way it will not go into V4, is if you have the transmission selector set to M and you paddle shift.
TDY - If you scroll through the display options, there is an option to see fuel economy data and the V4 and V8 icon will appear with it to indicate which mode it is in.
TDY - If you scroll through the display options, there is an option to see fuel economy data and the V4 and V8 icon will appear with it to indicate which mode it is in.
AIR FORCE VETERAN
Joined: Nov 2009
Posts: 6,223
Likes: 441
From: Pennsylvania
Drifting
Joined: Oct 2005
Posts: 1,331
Likes: 479
From: Appleton Wisconsin
I personally wouldn't be concerned about when 4cyl happens when you are in break in time. I'd be more concerned about RPM limits. As for using ECO mode it is much more then just going to 4cly operation. I know the throttle is slower to react and the transmission is not quick to down shift. I am sure there are other parameters.
Race Director
Joined: Sep 2001
Posts: 16,507
Likes: 84
From: Southern Indiana
Per my post #14, there is a minimum speed of 15.5 mph and a max rpm, 2800 rpm. But in 7th, 2800 rpm (Z51 gears) that's 133 mph and in 6th 112 mph. There is a vacuum limit but can't believe the vacuum is that much different at 70 where mine activates than in 80 mph, unless you were going up a hill.
On a quick look, could not find a specific max speed in the 2014 Service Manual.
On a quick look, could not find a specific max speed in the 2014 Service Manual.
There is no gas guzzler tax on any Stingray or on the manual transmission Z06. But the Auto-trans Z06 did get hit with it.
Last edited by xwing; Jun 21, 2016 at 11:36 AM.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,937
Likes: 12,351
From: NE South Carolina
When I did the museum delivery they told me keep it in V8 for break in miles. I have the A8 so kept it in manual. I just had my 2013 Avalanche rebuilt under warranty with 50,000 miles because it was using oil. Worst thing for these engines is switching to V4, I use the Range to keep it in V8.
I don't burn or add any oil in my September 2013 built C7, Z51 between oil changes. Just Sayn'.
Last edited by JerryU; Jun 21, 2016 at 04:34 PM.