What was Chevy's reason behind the L99 with automatic?

[JCunningham]

yes but i have tried it with it off and on in the tune. i spent 3 month testing it.

[GMTool]

What was Chevy's lack of reasoning behind the L99 with automatic?

Fixed title of thread.

General Motors Co. probably runs on politics and meetings studying charts and graphs like all big companies do any more. Common sense and reality are non existent.

[Number 3]

Originally Posted by GMTool

What was Chevy's lack of reasoning behind the L99 with automatic?

Fixed title of thread.

General Motors Co. probably runs on politics and meetings studying charts and graphs like all big companies do any more. Common sense and reality are non existent.

What it runs on like every other business is making money.

If the Camaro with an automatic had a $1700 GG Tax it would have been a sales and marketing nightmare.

Your post, although seemingly full of hate and vitriol in no way explains why GM decided to put AFM in the Camaro.

Explain how you think the Camaro with $1700 tax bill on the sticker would have sold as many cars when the Mustang did not have that burden. And to be clear "because you would have bought one" doesn't count nor does "myself and 6 buddies would have"

And keep in mind I did choose to pay the GG tax on my SS and I can assure you I would not have bought it with AFM.

But you all simply want to bash GM for some reason. Not sure why.

[Low Saturn]

Under real world everyday driving conditions on a daily driven Camaro with the L99, I consistently get better MPG and better throttle response with the AFM disabled. I'm currently using the Range AFM disabler, but plan on a tune in the future.

I purchased my Camaro in December of 2013 and drove it with AFM active until September of 2014. In September I installed a catback exhaust and decided to disable AFM because of the drone when it enabled.

Since the day I purchased the car I have been tracking MPG. Mostly because I planned on eventually getting an aftermarket exhaust system and knew the effects on the tone of the exhaust on a L99 and that I would tune out AFM. So I wanted to see for myself the results. I also wanted to see the difference in MPG from my previous car. From December 2013 to September 2014, with an even mix of highway/city driving with a 22 mile round trip commute, I averaged 16.9 mpg. From September 2013 until now, under the same exact driving conditions and commute, I average 17.2 mpg. Not a huge difference, but there is a difference. Plus the exhaust tone is better and the power is there when I need it.

They claim going from four cylinder mode to eight is instantaneous. It may be electronically, but mechanically, that is far from being the case. Until they can get AFM to give significantly better MPG in the real world and have it change modes instantly mechanically, I'd say GM's AFM technology is a failure. At least in the Camaro.

Under optimal conditions, on a closed course, with a professional driver, driving the car in a way what optimizes the way the system works, it may actually work. But who drives like that? Especially a V8 muscle car?

[Chevy_cowboy]

Originally Posted by Number 3

GM decreed there would be no GG tax on the Camaro. My SS with the LS3 and an automatic carried a $1,700 tax.

This would have put the Camaro at a HUGE disadvantage against the Mustang.

+1

AFM was the only way they could get the automatic cars below the GG tax threshold. Manual cars don't have it because they didn't need it to hit those numbers, the CAGS (skip shift) system was enough.

[JCunningham]

in my 08 silverado all afm would do was make the truck shutter then go back into v8. edited. the skip shift is also something that only works on paper. in real life it just wants to stall the car.

[Chevy_cowboy]

Originally Posted by JCunningham

in my 08 silverado all afm would do was make the truck shutter then go back into v8. # why did you have to pay the gg tax. The SS does not have a GG tax.

The SS Sedan does indeed have the GG tax because it has the LS3 paired with an automatic.


Edit: well at least the automatic transmission equipped SS Sedans do, starting this year the SS is available with a manual for the first time, it would not surprise me if it avoids the GG tax but I haven't seen one in person yet to check the window sticker.

[JCunningham]

i keep on confusing the Chevy SS with a Camaro SS when its mentioned on here.

[Number 3]

Originally Posted by Low Saturn

Under real world everyday driving conditions on a daily driven Camaro with the L99, I consistently get better MPG and better throttle response with the AFM disabled. I'm currently using the Range AFM disabler, but plan on a tune in the future.

I purchased my Camaro in December of 2013 and drove it with AFM active until September of 2014. In September I installed a catback exhaust and decided to disable AFM because of the drone when it enabled.

Since the day I purchased the car I have been tracking MPG. Mostly because I planned on eventually getting an aftermarket exhaust system and knew the effects on the tone of the exhaust on a L99 and that I would tune out AFM. So I wanted to see for myself the results. I also wanted to see the difference in MPG from my previous car. From December 2013 to September 2014, with an even mix of highway/city driving with a 22 mile round trip commute, I averaged 16.9 mpg. From September 2013 until now, under the same exact driving conditions and commute, I average 17.2 mpg. Not a huge difference, but there is a difference. Plus the exhaust tone is better and the power is there when I need it.

They claim going from four cylinder mode to eight is instantaneous. It may be electronically, but mechanically, that is far from being the case. Until they can get AFM to give significantly better MPG in the real world and have it change modes instantly mechanically, I'd say GM's AFM technology is a failure. At least in the Camaro.

Under optimal conditions, on a closed course, with a professional driver, driving the car in a way what optimizes the way the system works, it may actually work. But who drives like that? Especially a V8 muscle car?

Sorry, but from a technology standpoint your calling this a FAIL is simply wrong. Your opinion counts. But the governments counts more..........wait theirs is fact not opinion.

AFM gives, as I recall, only about 1 mpg or so and that is all it took to avoid the GG tax.

Look, I agree, it is NOT seamless. There is a reason why the L99 Camaro has 4 (check me) flex couplings in the exhaust. The first G8 CTF I drove to Florida was a nightmare to drive in mountains in 4 cylinder mode. I HATE AFM!!!!!

Buuuuuut data and fact suggest the technology works and that is why GM uses it, Fiat uses it and so does Honda. That is my only point. AFM saves fuel. I just get tired of people claiming science and fact or invalid.

Also please note.....................YOU MODDED YOUR CAR so comparing FE before and after is only a comparison of your car. A lower restriction exhaust alone (which GM can't do for noise regulations) would likely improve your FE.

For reference, my SS in the real world on the highway gets 21............with a tail wind. Every L99 Camaro I've driven can do 23 or 24. Again, anecdotal, but from my experience, it makes a difference.

So I agree...................IT SUCKS.

But it delivers better FE.

[GMTool]

Originally Posted by Number 3

What it runs on like every other business is making money.

If the Camaro with an automatic had a $1700 GG Tax it would have been a sales and marketing nightmare.

Your post, although seemingly full of hate and vitriol in no way explains why GM decided to put AFM in the Camaro.

Explain how you think the Camaro with $1700 tax bill on the sticker would have sold as many cars when the Mustang did not have that burden. And to be clear "because you would have bought one" doesn't count nor does "myself and 6 buddies would have"

And keep in mind I did choose to pay the GG tax on my SS and I can assure you I would not have bought it with AFM.

But you all simply want to bash GM for some reason. Not sure why.

Dang Man, lighten up. I didn't take it that serious. And I really don't give a rats ass. I work for a big company and experience first hand everyday what bull crap it is. But I'm glad to have a job, blessed to have the one I got and I do not take it for granted.

[JCunningham]

im sure theres people on here that only have a range device lets ask them in a poll if they got better mileage.

[Chevy_cowboy]

Originally Posted by JCunningham

im sure theres people on here that only have a range device lets ask them in a poll if they got better mileage.

It really doesn't matter if individual owners get better mileage or not, what matters is if the guys doing the EPA test do. Thats the official figure that gets branded on the car and what determines GG tax.

AFM works if you drive for it, make a game out of seeing how long you can keep it in 4 cylinder mode, know how much throttle you can give it when you hit a hill without kicking it into 8cyl, ect. Its a great system for the folks that want to do that... like my dad that'll go on vacation in his silverado and come home excited about the 25mpg average.

But realistically, most people won't put that much effort into it, especially in a V8 Camaro.

[hrpiii]

and all this time I was thinking it was to give you LS3 guys a fair shot on the 1/4 mile. L99 for the AFM, non GG taxing, faster, winning car.

[JCunningham]

Iv never had it on the camaro but on a silverado in NY it would only kick in 4cyl going downhill as soon as you leveled out it shuttered and went back to 8.