V4 eliminator?
Thread Starter
Racer
Joined: Aug 2005
Posts: 304
Likes: 4
From: Shelton CT
V4 eliminator?
It would have been nice if Chevy put a software switch on the Vette so you could opt to NOT go into V4 mode. Like we can do with the NPP option. I'm sure V4 mode was done just like the CAGS setup - to keep the corporate gas mpg up.
So I'm thinking...
There's a simple CAGS eliminator to negate the 1-4 shift. It basically fakes out the system.
In the new Vette, I'm sure there is a set of variables that determine when the car goes into V4 mode. Do you think someone will come up with a way to electronically alter one of the sensors so the algorithm that makes the change to V4 is never met, and the car therefor never goes into V4 mode?
Kind of a V4 eliminator plug-in mod!
Seems like GM won't do it, but the car owner certainly could, just like many do for CAGS. Just like CAGS, the mpg would suffer, but... who cares on a Vette? Especially if it's switchable.
Any thoughts?
Ed
So I'm thinking...
There's a simple CAGS eliminator to negate the 1-4 shift. It basically fakes out the system.
In the new Vette, I'm sure there is a set of variables that determine when the car goes into V4 mode. Do you think someone will come up with a way to electronically alter one of the sensors so the algorithm that makes the change to V4 is never met, and the car therefor never goes into V4 mode?
Kind of a V4 eliminator plug-in mod!
Seems like GM won't do it, but the car owner certainly could, just like many do for CAGS. Just like CAGS, the mpg would suffer, but... who cares on a Vette? Especially if it's switchable.Any thoughts?
Ed
Instructor
Joined: Jan 2013
Posts: 153
Likes: 74
It would have been nice if Chevy put a software switch on the Vette so you could opt to NOT go into V4 mode. Like we can do with the NPP option. I'm sure V4 mode was done just like the CAGS setup - to keep the corporate gas mpg up.
So I'm thinking...
There's a simple CAGS eliminator to negate the 1-4 shift. It basically fakes out the system.
In the new Vette, I'm sure there is a set of variables that determine when the car goes into V4 mode. Do you think someone will come up with a way to electronically alter one of the sensors so the algorithm that makes the change to V4 is never met, and the car therefor never goes into V4 mode?
Kind of a V4 eliminator plug-in mod! Seems like GM won't do it, but the car owner certainly could, just like many do for CAGS. Just like CAGS, the mpg would suffer, but... who cares on a Vette? Especially if it's switchable.
Any thoughts?
Ed
So I'm thinking...
There's a simple CAGS eliminator to negate the 1-4 shift. It basically fakes out the system.
In the new Vette, I'm sure there is a set of variables that determine when the car goes into V4 mode. Do you think someone will come up with a way to electronically alter one of the sensors so the algorithm that makes the change to V4 is never met, and the car therefor never goes into V4 mode?
Kind of a V4 eliminator plug-in mod!
Seems like GM won't do it, but the car owner certainly could, just like many do for CAGS. Just like CAGS, the mpg would suffer, but... who cares on a Vette? Especially if it's switchable.Any thoughts?
Ed
Advanced
Joined: Apr 2014
Posts: 98
Likes: 2
It would have been nice if Chevy put a software switch on the Vette so you could opt to NOT go into V4 mode. Like we can do with the NPP option. I'm sure V4 mode was done just like the CAGS setup - to keep the corporate gas mpg up.
So I'm thinking...
There's a simple CAGS eliminator to negate the 1-4 shift. It basically fakes out the system.
In the new Vette, I'm sure there is a set of variables that determine when the car goes into V4 mode. Do you think someone will come up with a way to electronically alter one of the sensors so the algorithm that makes the change to V4 is never met, and the car therefor never goes into V4 mode?
Kind of a V4 eliminator plug-in mod! Seems like GM won't do it, but the car owner certainly could, just like many do for CAGS. Just like CAGS, the mpg would suffer, but... who cares on a Vette? Especially if it's switchable.
Any thoughts?
Ed
So I'm thinking...
There's a simple CAGS eliminator to negate the 1-4 shift. It basically fakes out the system.
In the new Vette, I'm sure there is a set of variables that determine when the car goes into V4 mode. Do you think someone will come up with a way to electronically alter one of the sensors so the algorithm that makes the change to V4 is never met, and the car therefor never goes into V4 mode?
Kind of a V4 eliminator plug-in mod!
Seems like GM won't do it, but the car owner certainly could, just like many do for CAGS. Just like CAGS, the mpg would suffer, but... who cares on a Vette? Especially if it's switchable.Any thoughts?
Ed
I think in a manual, it only does it when in ECO mode anyway.
Thread Starter
Racer
Joined: Aug 2005
Posts: 304
Likes: 4
From: Shelton CT
I have an automatic, and wish the AFM was only active in Touring, Eco, and Weather, or separately switchable.
I've read the manual a few times. Seems like you could put the auto in M (paddle shift mode) and, except for the fact that it would start in 2nd, the auto would still shift automatically, even in M.
That's in the manual, need to see how that works out in the car next.
My research indicates a max of 12% gas savings with AFM. I'd pay the extra $$$ in gas (switchable) to get the NPP to sound consistently good by eliminating V4 activation.
Bottom line: I would prefer a V4 on/off switch. I don't see it happening as a software update from GM, but a gizmo like a CAGS eliminator or Mild2Wild switch would be a great way to implement the option.
Not sure what the specific parameters are that tell the engine it's OK to use V4. Still researching.....
Ed
I've read the manual a few times. Seems like you could put the auto in M (paddle shift mode) and, except for the fact that it would start in 2nd, the auto would still shift automatically, even in M.
That's in the manual, need to see how that works out in the car next.
My research indicates a max of 12% gas savings with AFM. I'd pay the extra $$$ in gas (switchable) to get the NPP to sound consistently good by eliminating V4 activation.
Bottom line: I would prefer a V4 on/off switch. I don't see it happening as a software update from GM, but a gizmo like a CAGS eliminator or Mild2Wild switch would be a great way to implement the option.
Not sure what the specific parameters are that tell the engine it's OK to use V4. Still researching.....
Ed
Last edited by c5eddiem; May 18, 2014 at 10:07 AM.
Thread Starter
Racer
Joined: Aug 2005
Posts: 304
Likes: 4
From: Shelton CT
AFVETTE,
I'm really hoping for a piece of inexpensive hardware that fakes out a sensor (like CAGS). Problem is, figuring out what sensors contribute to the AFM formula.
I don't want a tuner messing with the "brains of the operation" - no offense, tuners!
Ed
I'm really hoping for a piece of inexpensive hardware that fakes out a sensor (like CAGS). Problem is, figuring out what sensors contribute to the AFM formula.
I don't want a tuner messing with the "brains of the operation" - no offense, tuners!
Ed
Team Owner
Joined: Jul 2006
Posts: 97,155
Likes: 1,471
From: Calgary, AB. There's a reason why white was the only color offered on every year Corvette. Proud Canadian German Jamaican!
St. Jude Donor '09, '12-'13-'14-'15-'16-'17
V4 mode is a joke, I was driving up to Kelowna on Thursday and with the cruise set, flat surface, you can feel it kicking in and out, for no reason......straight flat surface and cruise is set, why is it switching back and forth? 
Le Mans Master
Joined: Oct 2004
Posts: 8,615
Likes: 60
From: Haymarket Virginia
GM Did put a switch in. This switch has 8 positions and about $1300 cheaper LOL
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Burning Brakes
Joined: Aug 2013
Posts: 1,058
Likes: 36
From: Papillion NE
I just drove on the freeway for 700 miles yesterday. I had my C7 manual in the Eco mode. I tried to drive around 65-75 all the way from Omaha to Bowling Green. I averaged 30.2 MPG. I agree that the car did go in and out of 4 and 8 cylinders. I would agree it does not seem like a race car in that mode. But isnt that the point kind-of? To have the capability of driving a race car in sport/track and then switching to good gas mode and getting 30 MPG? From my view - its thank you GM - great job.
Racer
Joined: Nov 2013
Posts: 313
Likes: 44
From: Little Rock AR
Team Owner
Joined: Jul 2006
Posts: 97,155
Likes: 1,471
From: Calgary, AB. There's a reason why white was the only color offered on every year Corvette. Proud Canadian German Jamaican!
St. Jude Donor '09, '12-'13-'14-'15-'16-'17
I just drove on the freeway for 700 miles yesterday. I had my C7 manual in the Eco mode. I tried to drive around 65-75 all the way from Omaha to Bowling Green. I averaged 30.2 MPG. I agree that the car did go in and out of 4 and 8 cylinders. I would agree it does not seem like a race car in that mode. But isnt that the point kind-of? To have the capability of driving a race car in sport/track and then switching to good gas mode and getting 30 MPG? From my view - its thank you GM - great job.
Safety Car
Joined: Aug 2012
Posts: 3,960
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In addition to load there is an absolute timer (10 minutes max as I recall) and a cylinder heat sensor when the inactive bank becomes too cool either of which will cause it to re-enter V8 mode. This is necessary so that it can go back into V8 mode at full power at the instant required.
Safety Car
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From: Boca Raton, FL
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Team Owner
Joined: Jul 2006
Posts: 97,155
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From: Calgary, AB. There's a reason why white was the only color offered on every year Corvette. Proud Canadian German Jamaican!
St. Jude Donor '09, '12-'13-'14-'15-'16-'17
In addition to load there is an absolute timer (10 minutes max as I recall) and a cylinder heat sensor when the inactive bank becomes too cool either of which will cause it to re-enter V8 mode. This is necessary so that it can go back into V8 mode at full power at the instant required.
Safety Car
Joined: Aug 2012
Posts: 3,960
Likes: 1,106
And I agree with others that it would be very nice to switch it off. I will be ordering a Z06 auto in the second year of production with museum delivery and I plan to drive it home in paddle mode to avoid V4 during break-in. Somehow track mode just doesn't sound right for break-in and I believe that is the only other way to defeat AFM when equipped with auto, it would be nice if it were an eco/tour mode only feature. But at least we don't have the annoying engine start/stop YET...
I know GM says that AFM activation isn't a problem during break-in but I would like all of the cylinders to be doing the same thing during break-in.
I know GM says that AFM activation isn't a problem during break-in but I would like all of the cylinders to be doing the same thing during break-in.
Team Owner
Joined: Sep 1999
Posts: 20,054
Likes: 44
From: Swansea IL
And I agree with others that it would be very nice to switch it off. I will be ordering a Z06 auto in the second year of production with museum delivery and I plan to drive it home in paddle mode to avoid V4 during break-in. Somehow track mode just doesn't sound right for break-in and I believe that is the only other way to defeat AFM when equipped with auto, it would be nice if it were an eco/tour mode only feature. But at least we don't have the annoying engine start/stop YET...
I know GM says that AFM activation isn't a problem during break-in but I would like all of the cylinders to be doing the same thing during break-in.
I know GM says that AFM activation isn't a problem during break-in but I would like all of the cylinders to be doing the same thing during break-in.
Or does the new A8 behave differently?
Safety Car
Joined: Aug 2012
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Melting Slicks
Joined: May 2001
Posts: 2,596
Likes: 120
From: East Tennessee
I've read in a few places here people saying the AFM doesnt work in track mode with an auto, thats false, only way to stop AFM is be in manual mode.
A tuner would be the easiest way, the intune supposedly doesnt leave any traces except the flash counter, not sure I would want to risk blowing the warranty for just shutting off V4 with a custom tune.Will the Z06 for sure have AFM?