C7 General Discussion General C7 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Variable drive

Thread Tools
 
Search this Thread
 
Old Aug 25, 2013 | 12:55 PM
  #1  
Neil Baker's Avatar
Neil Baker
Thread Starter
Burning Brakes
20 Year Member
 
Joined: Sep 2001
Posts: 937
Likes: 70
From: Ponte Vedra Florida
Default Variable drive

Engine management change from 8 cylinder to 4 cylinder, can the driver turn it off and run 8 cylinders all the time?
Reply
Old Aug 25, 2013 | 01:05 PM
  #2  
Zymurgy's Avatar
Zymurgy
Moderator
Supporting Lifetime Gold
Veteran: Air Force
Shutterbug
Community Favorite
Top Answer: 5
 
Joined: Feb 2006
Posts: 39,066
Likes: 17,932
From: DFW Area TX
Default

Yes. 4 cyl only in Eco mode.
Attached Images  
Reply
Old Aug 25, 2013 | 01:06 PM
  #3  
-CM-'s Avatar
-CM-
Melting Slicks
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2009
Posts: 2,867
Likes: 66
From: . Wyoming .
Default

Yes. AFM is only active in ECO mode for M7-equipped cars. For A6-equipped cars, I think it is active in all but Track mode. Someone please correct me if I'm wrong.
Reply
Old Aug 25, 2013 | 01:09 PM
  #4  
Zymurgy's Avatar
Zymurgy
Moderator
Supporting Lifetime Gold
Veteran: Air Force
Shutterbug
Community Favorite
Top Answer: 5
 
Joined: Feb 2006
Posts: 39,066
Likes: 17,932
From: DFW Area TX
Default

Originally Posted by -CM-
Yes. AFM is only active in ECO mode for M7-equipped cars. For A6-equipped cars, I think it is active in all but Track mode. Someone please correct me if I'm wrong.
Based on the chart I added to my post, AFM is only active in ECO mode. No distinction made between auto or manual.
Reply
Old Aug 25, 2013 | 02:20 PM
  #5  
yellowray's Avatar
yellowray
Instructor
 
Joined: Jun 2013
Posts: 235
Likes: 0
Default

Ok, what's "performance traction"? Drift mode?
Reply
Old Aug 25, 2013 | 02:24 PM
  #6  
jvp's Avatar
jvp
Tech Contributor
Supporting Lifetime Gold
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 1999
Posts: 10,445
Likes: 4,403
From: Northern VA
"Ask Tadge" Producer
Default

Originally Posted by -CM-
For A6-equipped cars, I think it is active in all but Track mode.
With the automatic, the AFM disengages if you decide to use the paddles on the steering wheel to shift gears. Otherwise, it's on in various degrees of aggressiveness except in Track mode.
Reply
Old Aug 25, 2013 | 02:26 PM
  #7  
jvp's Avatar
jvp
Tech Contributor
Supporting Lifetime Gold
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 1999
Posts: 10,445
Likes: 4,403
From: Northern VA
"Ask Tadge" Producer
Default

Originally Posted by yellowray
Ok, what's "performance traction"? Drift mode?
PTM is the engine management system (rapidly deactivates/re-activates cylinders) used on a race track. It's purpose is to allow the driver to plant their foot at the apex of a corner and the car will deliver the appropriate amount of torque to the rear wheels as traction allows.
Reply
Old Aug 25, 2013 | 02:40 PM
  #8  
-CM-'s Avatar
-CM-
Melting Slicks
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2009
Posts: 2,867
Likes: 66
From: . Wyoming .
Default

Originally Posted by Zymurgy
Based on the chart I added to my post, AFM is only active in ECO mode. No distinction made between auto or manual.
From the Motor Trend First Test:

Dial-A-Mode
The rotary switch tailors systems for Wet, Eco, Touring, Sport, or Track modes. The car remembers which mode you were in and restarts in that mode unless it was Track, in which case Sport comes up. Automatic cars activate V-4 mode in the first three modes; manuals only in Eco. Because the car does not default to this mode (as Porsches do), Chevy can't claim full EPA credit for it.


Originally Posted by jvp
With the automatic, the AFM disengages if you decide to use the paddles on the steering wheel to shift gears. Otherwise, it's on in various degrees of aggressiveness except in Track mode.
Interesting. MT didn't mention the paddle mode override, or the varying aggressiveness, but it makes sense.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Aug 25, 2013 | 02:49 PM
  #9  
Zymurgy's Avatar
Zymurgy
Moderator
Supporting Lifetime Gold
Veteran: Air Force
Shutterbug
Community Favorite
Top Answer: 5
 
Joined: Feb 2006
Posts: 39,066
Likes: 17,932
From: DFW Area TX
Default

Originally Posted by -CM-
From the Motor Trend First Test:

Dial-A-Mode
The rotary switch tailors systems for Wet, Eco, Touring, Sport, or Track modes. The car remembers which mode you were in and restarts in that mode unless it was Track, in which case Sport comes up. Automatic cars activate V-4 mode in the first three modes; manuals only in Eco. Because the car does not default to this mode (as Porsches do), Chevy can't claim full EPA credit for it.
...
Thanks, that is good info.
Reply
Old Aug 25, 2013 | 06:42 PM
  #10  
RickDI's Avatar
RickDI
Racer
 
Joined: Jul 2013
Posts: 385
Likes: 1
From: Maryland
Default

Originally Posted by -CM-
Yes. AFM is only active in ECO mode for M7-equipped cars. For A6-equipped cars, I think it is active in all but Track mode. Someone please correct me if I'm wrong.
On the automatic, I've read that is only available on the first 3 modes which says to me: Weather, ECO, Touring. I assumed it would not run under Sport and Track.

Edit: I see a few posts up someone linked to the same Motortrend article I read.
Reply

Get notified of new replies

To Variable drive





All times are GMT -4. The time now is 09:38 AM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE