AFM disabler
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
That seems to be the consensus of the speed shops I have talked to. The rest is a Hail Mary. I don't think I would keep the C7 long enough to justify a full cam swap so I probably will not do it. The AFM delete via the ECM will have to suffice. It also changes the tip in so oli don't need a throttle controller or throttle body. It also firms the shift so if it helps the AFM, so be it. If not, oh well.
Melting Slicks
Joined: Feb 2018
Posts: 2,184
Likes: 1,049
From: North Texas
Bottom line, Corvettes with a M7 trans never go into V4 mode unless your in ECO.
The computer is programed to stay in V8 mode unless ECO is engaged.
Same thing Diablo I3 or other programers do.
GM does not start plugging oil holes on M7 Corvettes. Why should you?
In Europe all C7's were in V8 mode until you told it to go to V4 mode. Just the opposite of here. Government dictated.
The computer is programed to stay in V8 mode unless ECO is engaged.
Same thing Diablo I3 or other programers do.
GM does not start plugging oil holes on M7 Corvettes. Why should you?
In Europe all C7's were in V8 mode until you told it to go to V4 mode. Just the opposite of here. Government dictated.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
Bottom line, Corvettes with a M7 trans never go into V4 mode unless your in ECO.
The computer is programed to stay in V8 mode unless ECO is engaged.
Same thing Diablo I3 or other programers do.
GM does not start plugging oil holes on M7 Corvettes. Why should you?
In Europe all C7's were in V8 mode until you told it to go to V4 mode. Just the opposite of here. Government dictated.
The computer is programed to stay in V8 mode unless ECO is engaged.
Same thing Diablo I3 or other programers do.
GM does not start plugging oil holes on M7 Corvettes. Why should you?
In Europe all C7's were in V8 mode until you told it to go to V4 mode. Just the opposite of here. Government dictated.
Melting Slicks
Joined: Feb 2018
Posts: 2,184
Likes: 1,049
From: North Texas
From what I have read most failures occur when the AFM lifters engage or disengage their locking pins that engage the lifter or not.
One mis-timing of one or both pins will result in a lifter failure. Hence the idea it is better to keep the engine in V8 mode all the time . No switching back and forth, pins stay static, no missed engagements.
One mis-timing of one or both pins will result in a lifter failure. Hence the idea it is better to keep the engine in V8 mode all the time . No switching back and forth, pins stay static, no missed engagements.
Last edited by Tinkertech; Jan 14, 2025 at 09:42 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
From what I have read most failures occur when the AFM lifters engage or disengage their locking pis that engage the lifter or not.
One mis-timing of one or both pins will result in a lifter failure. Hence the idea it is better to keep the engine in V8 mode all the time . No switching back and forth, pins stay static, no missed engagements.
One mis-timing of one or both pins will result in a lifter failure. Hence the idea it is better to keep the engine in V8 mode all the time . No switching back and forth, pins stay static, no missed engagements.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
Fair point. If I wasn't planning for a replacement to a C9 already and planned to keep the car, that set of lifters and cam would be decorating my wall.
T2T SUPPORTER
Joined: Jul 2013
Posts: 9,130
Likes: 5,037
From: NNCC No Name Car Crew; Owned 1 C2, 2 C3's, 1 C4, 3 C5's, 1 C6, 2 C7's; Now '86, '03; S. DE
2024 C5 of the Year Finalist - Modified
2024 C4 of the Year Finalist - Modified
2024 Corvette of the Year Finalist - Unmodified
2023 C3 of the Year Wnner - Unmodified
2023 C5 of the Year Finalist - Unmodified
St. Jude Donor '21-'22-'23-'24-'25-'26
Obtained a Range for my '14, worked well. Changed the Range over to my '16, did not operate as well. Sent it back to Range for one for the '16, worked fine. Range stated there was some software issues on the older model that didn't work on the newer. No cost to me for the change out.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
Obtained a Range for my '14, worked well. Changed the Range over to my '16, did not operate as well. Sent it back to Range for one for the '16, worked fine. Range stated there was some software issues on the older model that didn't work on the newer. No cost to me for the change out.
T2T SUPPORTER
Joined: Jul 2013
Posts: 9,130
Likes: 5,037
From: NNCC No Name Car Crew; Owned 1 C2, 2 C3's, 1 C4, 3 C5's, 1 C6, 2 C7's; Now '86, '03; S. DE
2024 C5 of the Year Finalist - Modified
2024 C4 of the Year Finalist - Modified
2024 Corvette of the Year Finalist - Unmodified
2023 C3 of the Year Wnner - Unmodified
2023 C5 of the Year Finalist - Unmodified
St. Jude Donor '21-'22-'23-'24-'25-'26
Yes, that was part of the issue. This was almost 10 years ago, I'm sure there have been more tech updates over time.