Notices
C8 Stingray/General Discussion The place to discuss the next generation of Corvette including the Stingray.
Sponsored by:
Sponsored by: Wheel Design

Afm

Thread Tools
 
Search this Thread
 
Old Jul 7, 2019 | 11:49 AM
  #1  
kev1949's Avatar
kev1949
Thread Starter
Racer
15 Year Member
 
Joined: Feb 2008
Posts: 286
Likes: 1
From: Demotte Indiana
Default Afm

Same engine ,same active fuel management. Sounds like the same old problem for the C8
Reply
Old Jul 7, 2019 | 12:10 PM
  #2  
FringbirdAloha's Avatar
FringbirdAloha
Burning Brakes
 
Joined: Sep 2018
Posts: 844
Likes: 729
From: Desert
Default

I don’t think the LT2 is an LT1. That’s why it’s called LT2.
Reply
Old Jul 7, 2019 | 03:37 PM
  #3  
84 4+3's Avatar
84 4+3
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2017
Posts: 6,944
Likes: 1,490
From: New Jersey
Default

I don't recall there being a huge problem with it in the first place?
Reply
Old Jul 7, 2019 | 04:34 PM
  #4  
JoesC5's Avatar
JoesC5
Team Owner
 
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
Default

Maybe GM will use their new AFM from the V8 Silverado that will even drop 7 cylinders and run on one, since it's now a LT2 instead of a LT1.
Reply
Old Jul 7, 2019 | 05:23 PM
  #5  
84 4+3's Avatar
84 4+3
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2017
Posts: 6,944
Likes: 1,490
From: New Jersey
Default

Originally Posted by JoesC5
Maybe GM will use their new AFM from the V8 Silverado that will even drop 7 cylinders and run on one, since it's now a LT2 instead of a LT1.
This will probably be the case at some point. Hard to say if it will have it right out of the gate or not. It will have some form of AFM.
Reply
Old Jul 7, 2019 | 05:25 PM
  #6  
RapidC84B's Avatar
RapidC84B
Team Owner
 
Joined: Feb 2013
Posts: 22,598
Likes: 14,559
Default

The car will have the latest AFM. We've seen the dash showing a "V8" logo by the tach. It wouldn't say this if there weren't other modes.

Good thing is there will be no torque tube harmonics to deal with and no torque converter.
Reply
Old Jul 7, 2019 | 05:37 PM
  #7  
84 4+3's Avatar
84 4+3
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2017
Posts: 6,944
Likes: 1,490
From: New Jersey
Default

Originally Posted by Tool Hoarder
The car will have the latest AFM. We've seen the dash showing a "V8" logo by the tach. It wouldn't say this if there weren't other modes.

Good thing is there will be no torque tube harmonics to deal with and no torque converter.
My Tahoe says V8 and then it says V4 when it drops using old AFM... That V8 in the photo doesn't mean it will have the newest one. (think 8 speed in 15 up, the trans was already out in 14...) But it probably will.
Reply
Old Jul 7, 2019 | 06:24 PM
  #8  
ACCHRM's Avatar
ACCHRM
Instructor
 
Joined: Sep 2018
Posts: 133
Likes: 82
From: San Diego, CA
Default

for everyone referring to old and new AFM, the new one is actually called Dynamic Fuel Management (deactivating all the way down to 1 cyl, vs the AFM can only go down to a V4, plus AFM deactivates the exact same cylinder banks, vs DFM changes it on a random), I imagine not being a problem deactivation so many cylinders on a performance car if it's fully doing it only in Eco or something like that.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Corvettes to Drive Before You Die!

 Joe Kucinski
story-1

Corvette & Porsche 911: How Two Icons Conquered the Last 25 Years

 Joe Kucinski
story-2

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-3

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-4

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-5

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-6

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-7

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-8

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-9

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
Old Jul 7, 2019 | 06:25 PM
  #9  
mschuyler's Avatar
mschuyler
Safety Car
 
Joined: Feb 2016
Posts: 4,980
Likes: 3,826
From: Bainbridge Island WA
Default

Originally Posted by kev1949
Same engine ,same active fuel management. Sounds like the same old problem for the C8
And what was the problem? Torque converter on an auto, right? And where is the torque converter for the C8? Oh wait....
Reply
Old Jul 7, 2019 | 07:26 PM
  #10  
jimmyb's Avatar
jimmyb
Race Director
 
Joined: Jan 2005
Posts: 13,934
Likes: 4,257
From: NC
Default

Well, I sure don't want to get into that old discussion, so here's my comment and question:

For a system like AFM/DFM to show an EPA increase, it must be ON (default) when the car is started.
So...I wonder if the C8 is going to start up in "Automatic" with AFM/DFM enabled?
Reply
Old Jul 7, 2019 | 09:30 PM
  #11  
rmorin1249's Avatar
rmorin1249
Le Mans Master
10 Year Member
Veteran: Army
Community Favorite
Top Answer: 5
 
Joined: Sep 2012
Posts: 7,146
Likes: 1,940
From: Hagerstown MD
St. Jude Donor '15-'16,'18
Default

Originally Posted by jimmyb
Well, I sure don't want to get into that old discussion, so here's my comment and question:

For a system like AFM/DFM to show an EPA increase, it must be ON (default) when the car is started.
So...I wonder if the C8 is going to start up in "Automatic" with AFM/DFM enabled?
Yes it likely will and GM may prevent you from disabling it. Tuners, like Range, will try to figure out how to disable it. Thank the government.

Last edited by rmorin1249; Jul 7, 2019 at 09:31 PM.
Reply
Old Jul 7, 2019 | 11:07 PM
  #12  
84 4+3's Avatar
84 4+3
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2017
Posts: 6,944
Likes: 1,490
From: New Jersey
Default

Originally Posted by jimmyb
Well, I sure don't want to get into that old discussion, so here's my comment and question:

For a system like AFM/DFM to show an EPA increase, it must be ON (default) when the car is started.
So...I wonder if the C8 is going to start up in "Automatic" with AFM/DFM enabled?
Even back in the day GM didn't easily let you turn it off... you had to get creative. I'd imagine in track mode or something it'll be off though. It is like that currently I believe.
Reply
Old Jul 8, 2019 | 12:47 AM
  #13  
Skid Row Joe's Avatar
Skid Row Joe
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2010
Posts: 32,314
Likes: 4,628
Default

Originally Posted by kev1949
Same engine ,same active fuel management. Sounds like the same old problem for the C8
Agreed.

I'll be LMAO, if/when the automatic transmission only C8 starts it's V4 shuddering.



.
Reply
Old Jul 8, 2019 | 12:51 AM
  #14  
Skid Row Joe's Avatar
Skid Row Joe
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2010
Posts: 32,314
Likes: 4,628
Default

Originally Posted by 84 4+3
My Tahoe says V8 and then it says V4 when it drops using old AFM... That V8 in the photo doesn't mean it will have the newest one. (think 8 speed in 15 up, the trans was already out in 14...) But it probably will.
The GMC Yukon XL's AFM is a miserable nuisance. C8.....here it comes.
Reply
Old Jul 8, 2019 | 08:32 AM
  #15  
84 4+3's Avatar
84 4+3
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2017
Posts: 6,944
Likes: 1,490
From: New Jersey
Default

Originally Posted by Skid Row Joe
The GMC Yukon XL's AFM is a miserable nuisance. C8.....here it comes.
The new ones just as bad? Great lol.
Reply
Old Jul 8, 2019 | 10:46 AM
  #16  
jimmyb's Avatar
jimmyb
Race Director
 
Joined: Jan 2005
Posts: 13,934
Likes: 4,257
From: NC
Default

Originally Posted by 84 4+3
Even back in the day GM didn't easily let you turn it off... you had to get creative. I'd imagine in track mode or something it'll be off though. It is like that currently I believe.
No, on a MANUAL C7, AFM is engaged only if you put the Drive Mode to "ECO" (car defaults to whatever mode you were in the last time the engine was shut down). On an automatic C7, AFM is on all the time, unless you put it in "M" and use the paddles.
I wonder if the C8 will operate like that....using the paddles disables AFM?

Last edited by jimmyb; Jul 8, 2019 at 10:47 AM.
Reply
Old Jul 8, 2019 | 12:32 PM
  #17  
MitchAlsup's Avatar
MitchAlsup
Le Mans Master
25 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Aug 2000
Posts: 5,532
Likes: 1,947
From: Austin Texas
Default

Originally Posted by FringbirdAloha
I don’t think the LT2 is an LT1. That’s why it’s called LT2.
They change the location where the transmission gets bolted up.
Reply

Get notified of new replies

To Afm





All times are GMT -4. The time now is 01:55 PM.

story-0
10 Corvettes to Drive Before You Die!

Slideshow: 10 Corvettes to drive before you die.

By Joe Kucinski | 2026-06-23 08:31:12


VIEW MORE
story-1
Corvette & Porsche 911: How Two Icons Conquered the Last 25 Years

Slideshow: Corvette and Porsche 911, how two icons conquered the last 25 years.

By Joe Kucinski | 2026-06-23 08:18:33


VIEW MORE
story-2
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-3
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-4
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-5
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-6
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-7
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-8
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-9
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE