Notices
C7 Tech/Performance Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

AFM delete...3 ways

 
Old 10-09-2017, 10:00 PM
  #1  
fatbillybob
CF Senior Member
Thread Starter
 
fatbillybob's Avatar
 
Member Since: Dec 2004
Posts: 2,920
Thanked 104 Times in 79 Posts
Default AFM delete...3 ways

Doing a search on AFM DOD delete I find 3 ways to delete:

1) The most popular is Ranger module. As a racer it is klinda worky for me and I have something else for my OBD2 port.


2) Doug ECS: AFM can be tuned out. We can send you a Diablo In Tune programmer that can take care of that for you without ruining your factory warranty.


3) Livernois mechanical delete gets rid of the DOD lifters and perhaps what joseC5 says about the OEM cam.
"On the Corvette, the camshaft has two different lobe profiles with the lobes for the AFM lifters having "softer" ramps to accelerate/de-accelerate the heavier lifters. GM claims that it doesn't hurt airflow but that makes no sense. If the "softer" ramps don't hinder airflow, then why do they have the other eight lifters with a different profile that opens/closes the valve at a faster rate." JoesC5


Livernois Motorsports Exclusive DOD delete system
Livernois Motorsports Exclusive Performance Camshaft
Livernois Motorsports Exclusive Cam Phaser Limiter
Livernois Motorsports Exclusive Upgraded Valve Springs package

Does anyone have experience with the full mechanical delete of the AFM??? I'm looking at this for a C7 racecar and it sounds like mechanical delete increases reliability.
fatbillybob is offline  
The Following User Says Thank You to fatbillybob For This Useful Post:
DOUG @ ECS (10-10-2017)
Old 10-09-2017, 10:39 PM
  #2  
FYREANT
I'm Batman..
Support Corvetteforum!
 
FYREANT's Avatar
 
Member Since: Apr 2014
Location: Lehigh Acres FL
Posts: 5,723
Thanked 745 Times in 481 Posts
Tech Contributor
Default

In order to truly delete DOD, you'll want to install a non DOD cam, non DOD lifters, plug the DOD towers, and also turn it off in the tune. I did this when I rebuilt my motor..
FYREANT is offline  
Old 10-12-2017, 09:45 AM
  #3  
fatbillybob
CF Senior Member
Thread Starter
 
fatbillybob's Avatar
 
Member Since: Dec 2004
Posts: 2,920
Thanked 104 Times in 79 Posts
Default

http://media.chevrolet.com/media/us/...16-camaro.html

(read 5th paragraph up from dimensions table)


This press release says the "manual" gearbox Camaro with v8 does not have AFM. This means GM has an LT1 engine componants stock to delete the AFM/DOD. Why don't people talk about an AFM delete with reliable OEM parts used in the manual gearbox camaro LT1 motors????
fatbillybob is offline  
Old 10-12-2017, 12:59 PM
  #4  
FYREANT
I'm Batman..
Support Corvetteforum!
 
FYREANT's Avatar
 
Member Since: Apr 2014
Location: Lehigh Acres FL
Posts: 5,723
Thanked 745 Times in 481 Posts
Tech Contributor
Default

Originally Posted by fatbillybob View Post
http://media.chevrolet.com/media/us/...16-camaro.html

(read 5th paragraph up from dimensions table)


This press release says the "manual" gearbox Camaro with v8 does not have AFM. This means GM has an LT1 engine componants stock to delete the AFM/DOD. Why don't people talk about an AFM delete with reliable OEM parts used in the manual gearbox camaro LT1 motors????
Not exactly. The AFM is there on auto and manual, but on the auto it is forced on in all modes I believe. In the manual its only on in Eco mode. Its an ECM/BCM configuration that changes this, not hardware. So, it would still need to be tuned to not engage specifically.
FYREANT is offline  
Old 10-12-2017, 08:34 PM
  #5  
fatbillybob
CF Senior Member
Thread Starter
 
fatbillybob's Avatar
 
Member Since: Dec 2004
Posts: 2,920
Thanked 104 Times in 79 Posts
Default

nevermind

Last edited by fatbillybob; 10-12-2017 at 08:42 PM.
fatbillybob is offline  
Old 03-14-2019, 06:21 PM
  #6  
phantom1
CF Senior Member
 
phantom1's Avatar
 
Member Since: Jun 2012
Location: Short Hills NJ
Posts: 555
Thanked 25 Times in 23 Posts
Default

Originally Posted by FYREANT View Post
In order to truly delete DOD, you'll want to install a non DOD cam, non DOD lifters, plug the DOD towers, and also turn it off in the tune. I did this when I rebuilt my motor..
I did a muffler mod on my C7 M7 and removed the AFM from the axle back pipe. If I disable DOD in the tune, will I need to do anything else? Is the stock cam okay with DOD disabled? I'm changing the lifters later when I do the heads.

Last edited by phantom1; 03-14-2019 at 06:37 PM.
phantom1 is offline  
Old 03-14-2019, 06:32 PM
  #7  
KemahGT
CF Senior Member
 
KemahGT's Avatar
 
Member Since: Oct 2014
Posts: 542
Thanked 120 Times in 81 Posts
Default

Originally Posted by phantom1 View Post
I did a muffler mod on my C7 M7 and removed the AFM from the axle back pipe. If I disable DOD in the tune, will I need to do anything else? Is the stock cam okay with DOD disabled? I'm changing the lifters later when I do the heads.
Dont quote me, but, I believe you will still get a CEL. Check with the guys that track. I also think they there is a way to get the ECM to ignore the missing valves in HPTuners. However, it may take more credits. Chassis ECM I think.
KemahGT is offline  
The Following User Says Thank You to KemahGT For This Useful Post:
phantom1 (03-14-2019)
Old 03-14-2019, 06:44 PM
  #8  
phantom1
CF Senior Member
 
phantom1's Avatar
 
Member Since: Jun 2012
Location: Short Hills NJ
Posts: 555
Thanked 25 Times in 23 Posts
Default

Originally Posted by KemahGT View Post
Dont quote me, but, I believe you will still get a CEL. Check with the guys that track. I also think they there is a way to get the ECM to ignore the missing valves in HPTuners. However, it may take more credits. Chassis ECM I think.
Yea, you're probably right, DOD disable sounds too easy. I disconnected the AFM valve from the sensor. I'm going to plug just the valve in, and see if that clears the code.

Thanks
phantom1 is offline  
Old 03-14-2019, 06:44 PM
  #9  
FYREANT
I'm Batman..
Support Corvetteforum!
 
FYREANT's Avatar
 
Member Since: Apr 2014
Location: Lehigh Acres FL
Posts: 5,723
Thanked 745 Times in 481 Posts
Tech Contributor
Default

Originally Posted by KemahGT View Post
Dont quote me, but, I believe you will still get a CEL. Check with the guys that track. I also think they there is a way to get the ECM to ignore the missing valves in HPTuners. However, it may take more credits. Chassis ECM I think.
that sounds right from what i know. But I donít know what to modify for that..
FYREANT is offline  
Old 03-14-2019, 06:48 PM
  #10  
FYREANT
I'm Batman..
Support Corvetteforum!
 
FYREANT's Avatar
 
Member Since: Apr 2014
Location: Lehigh Acres FL
Posts: 5,723
Thanked 745 Times in 481 Posts
Tech Contributor
Default

Originally Posted by KemahGT View Post
Dont quote me, but, I believe you will still get a CEL. Check with the guys that track. I also think they there is a way to get the ECM to ignore the missing valves in HPTuners. However, it may take more credits. Chassis ECM I think.
you donít need to disable DoD entirely. You just need to set the AFM exhaust valves to not alert to a problem condition. This can be done by tuning the C304 module in HPT and requires two separate credits to do. If you need to know how to do that Pm me and Iíll send you the link to the guide I wrote on it.
FYREANT is offline  
Old 03-14-2019, 08:39 PM
  #11  
phantom1
CF Senior Member
 
phantom1's Avatar
 
Member Since: Jun 2012
Location: Short Hills NJ
Posts: 555
Thanked 25 Times in 23 Posts
Default

Originally Posted by FYREANT View Post
you don’t need to disable DoD entirely. You just need to set the AFM exhaust valves to not alert to a problem condition. This can be done by tuning the C304 module in HPT and requires two separate credits to do. If you need to know how to do that Pm me and I’ll send you the link to the guide I wrote on it.
I'll try disabling DOD first, and if that doesn't work, I'll plug just the sensors in, with the valves disconnected. I can drive it with the sensors connected, and it won't go into V4, as long as I don't put it in eco mode. If neither works, I'll use your method.

Thanks for your help.

Last edited by phantom1; 03-14-2019 at 08:44 PM.
phantom1 is offline  
Old 03-15-2019, 09:40 AM
  #12  
LuisZ51
CF Senior Member
 
LuisZ51's Avatar
 
Member Since: Jan 2019
Location: Lake Placid, FL
Posts: 326
Thanks: 0
Thanked 44 Times in 34 Posts
Default

I'm a bit confused here. Does it need to be deleted on an M7 or just stay out of Eco mode? I'm about to install my SC soon. Would turning it off in the tune be sufficient?
Is most of this info for the auto cars?
LuisZ51 is offline  
Old 03-15-2019, 10:55 AM
  #13  
phantom1
CF Senior Member
 
phantom1's Avatar
 
Member Since: Jun 2012
Location: Short Hills NJ
Posts: 555
Thanked 25 Times in 23 Posts
Default

Originally Posted by LuisZ51 View Post
I'm a bit confused here. Does it need to be deleted on an M7 or just stay out of Eco mode? I'm about to install my SC soon. Would turning it off in the tune be sufficient?
Is most of this info for the auto cars?
I cut and removed the AFM valves from my exhaust, and use a straight pipe. That's why I need to either disable AFM, or connect the sensor back. I have the M7. With the M7, just stay out of eco mode. The auto cars are different, they stay in eco mode, unless you drive in manual mode.
phantom1 is offline  
 


Thread Tools
Search this Thread
Quick Reply: AFM delete...3 ways


Sponsored Ads
Vendor Directory

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: