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Old 02-20-2013, 02:39 PM   #57
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Quote:
Originally Posted by steveo9043 View Post
I know back in the day, manual trans cars would get better mileage with the same motor. So maybe an Automatic LS3 would get 2-3 mpg less then a manual LS3 so the increase of 1 mpg over the ls3 manual may be 3-4mpg ls3 auto vs l99 auto... Make sense?

I agree with you that manuals have traditionally gotten better mileage than autos...and you are probably correct that the AFM enables the autos to keep close, or better...but 1mpg for highway mileage rating better with the automatic than the manual....seems like it should be much higher than that...


Now I understood the LT1 dod/afm on/off was turning on/off the ability for it to go into 4 cylinder mode.

example:
dod off (always V8)
dod on (just like L99 cars, the ability to go into 4 cylinder mode)
....Good info....then if AFM is also used on manuals, their mpg should be significantly greater than the automatics again, as you state above...

EDIT...screwed up the quote thing...lol...replied to the first part in your quote...sorry...lol
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Old 02-20-2013, 02:50 PM   #58
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Yu mean its bad to have your cake and eat it too? I'd love to be able to get 35mpg on my 2010 by it using 4 cyl and when I want to play with the power, I have it. I mean why burn fuel on a trip when you dont have to?

This^^ plus its not about wanting a 4cyl camaro. I never want that as an option. Its about being able to have the option and ensuring that we can always have a V8 in our cars 10 years from now with crap like CAFE inhibiting our enthusiast crowd. The better the gas mileage a V8 camaro can get, means the more V8's they can sell across the fleet which keeps that rumble in my car!
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Old 02-20-2013, 03:27 PM   #59
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Originally Posted by 90503 View Post
Not much would be good, other than having the option of being in either one...

...Like it or not, it seems AFM is here to stay...and if it is, and can be capable of significantly better mileage, it might help keep around the availablility of V-8's that don't have AFM...
I'm all about fuel management. I just didn't want an automatic as an option when I bought my SS. My AFM is me not putting my foot in it every time I am on the road. In actuality, I am probably more gingerly with my SS than I am with my EVO. Reason being, I like the cruise effect and to hear and feel the rumble that only a V-8 can give me.
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Old 02-20-2013, 03:30 PM   #60
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Yu mean its bad to have your cake and eat it too? I'd love to be able to get 35mpg on my 2010 by it using 4 cyl and when I want to play with the power, I have it. I mean why burn fuel on a trip when you dont have to?
I didn't say that it was bad. It's just all personal preference. I don't think the majority of us have our foot all in the floor whenever we take out our Camaros. We all know a foot in the floor will end up with more fuel demanded to keep up with the foot
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Old 02-20-2013, 03:31 PM   #61
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The better the gas mileage a V8 camaro can get, means the more V8's they can sell across the fleet which keeps that rumble in my car!
I think we all want better gas mileage, regardless of AFM. If they are doing it to appease the US Govt, then so be it.
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Old 02-20-2013, 03:39 PM   #62
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Quote:
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I didn't say that it was bad. It's just all personal preference. I don't think the majority of us have our foot all in the floor whenever we take out our Camaros. We all know a foot in the floor will end up with more fuel demanded to keep up with the foot
I don't think preference has anything to do with it. Everyone who owns a V-8 would love to to take a trip on vacation in their cars on 4cyl and then when they get to their destinations, turn on all 8. Or if its your DD on wkends, it's an 8cyl. During the week it's a 4. It's not like it'd replace the 4 or 6cyl because you're deactivating cylinders. Lol. That's preference. By choosing to save gas ALL the time.
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Old 02-20-2013, 03:40 PM   #63
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Quote:
Originally Posted by 90503 View Post
Not much would be good, other than having the option of being in either one...

...Like it or not, it seems AFM is here to stay...and if it is, and can be capable of significantly better mileage, it might help keep around the availablility of V-8's that don't have AFM...
I agree that AFM/DOD is here to stay on larger displacement engines, and I think it will get better over time. However, I think GM will probably introduce some 5.0-5.7 L engines that don't have AFM/DOD at some point. If the power is there, a lot of people will opt for those instead of the larger displacement versions just to get away from AFM/DOD. Just my opinion.
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Old 02-20-2013, 03:41 PM   #64
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I think we all want better gas mileage, regardless of AFM. If they are doing it to appease the US Govt, then so be it.
I'd say if the LT1 is the Gen6 SS V-8 engine, then definitely an up-grade with more hp and torq...

....If it has AFM on all models, but we have the ability to drive without it, as an "option" of our choice, then that also is a good up-grade...

....If AFM adds better mileage to the V-8s, manual or auto...another good "option" if you "choose" to drive in that mode....
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Old 02-20-2013, 04:04 PM   #65
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I agree that AFM/DOD is here to stay on larger displacement engines, and I think it will get better over time. However, I think GM will probably introduce some 5.0-5.7 L engines that don't have AFM/DOD at some point. If the power is there, a lot of people will opt for those instead of the larger displacement versions just to get away from AFM/DOD. Just my opinion.
Could very well be....It seems the AFM engines are somewhat limited, or more problematic when it comes to aftermarket super-charging or turbo-charging with the different valve/rockers, whatever compared to the LS3...(Nothing but love for L99ers...lol...just from what I've seen around here...LS3 "conversions" prior to forced induction)...

Perhaps the 5.0-5.7 engine (LT-4??) may fill that void and satisfy more aftermarket applications...A second V-8 engine option of any kind would be totally awesome, imo...
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Old 02-27-2013, 01:30 PM   #66
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The fact that GM introduced the Gen V LT1 at 6.2L would likely mean they won't be offering a lower displacement performance V8’s, this generation.

There wouldn't be a business case to develop a smaller displacement performance V8 purely to circumvent their AFM/DOD technology.

Lots of speculation as to what the higher performance variations of the LT1 will be but it's not likely to be any less displacement than the 6.2L.

GM is in the business of building cars and trucks for profit. Not in the business of supplying street cars with engines capable of big aftermarket HP. Despite what we enthusiasts want.
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Old 02-27-2013, 02:28 PM   #67
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I agreee but disagree also. If they produce a car that takes kindly to after market enhancing, one might be more apt to purchase it over another less modifyable car.

Last edited by Mikes SS; 02-27-2013 at 02:49 PM.
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Old 02-27-2013, 02:36 PM   #68
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Quote:
Originally Posted by KarFan View Post
The fact that GM introduced the Gen V LT1 at 6.2L would likely mean they won't be offering a lower displacement performance V8’s, this generation.

There wouldn't be a business case to develop a smaller displacement performance V8 purely to circumvent their AFM/DOD technology.

Lots of speculation as to what the higher performance variations of the LT1 will be but it's not likely to be any less displacement than the 6.2L.

GM is in the business of building cars and trucks for profit. Not in the business of supplying street cars with engines capable of big aftermarket HP. Despite what we enthusiasts want.
Here's a list of the Gen 4 engines and displacements. Are you seriously suggesting the will go from a range of 4.3L to 7.0 L in the Gen 4 to a 6.2 - 6.2+ displacement in Gen 5?

LS2 - 6.0
L76 - 6.0
L98 - 6.0
L77 - 6.0
Vortec 4800 - 4.8
Vortec 5300 - 5.3
Vortec 6000 - 6.0
LS4 - 5.3
LS7 - 7.0
L92 - 6.2
LS3 - 6.2
L99 - 6.2
LS9 - 6.2 SC
LSA - 6.2 SC
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Old 02-27-2013, 05:11 PM   #69
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The key word I used is Performance. There have been and will be many different displacement V8's for many applications in GM (cars and trucks)

However for NA performance applications, Camaro, Corvette and now SS I'm saying that it wouldn't seem likely that GM would develop another V8 of lower displacement for use in these vehicles.
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Old 02-27-2013, 05:20 PM   #70
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The key word I used is Performance. There have been and will be many different displacement V8's for many applications in GM (cars and trucks)

However for NA performance applications, Camaro, Corvette and now SS I'm saying that it wouldn't seem likely that GM would develop another V8 of lower displacement for use in these vehicles.
I found it interesting that Dodge offers 2 different Hemi's for the Challenger...Don't know why GM would need to "develop" a new engine, instead of offering say the LT1...(450 hp, with AFM) as well as the LS3 (426 hp, without AFM)...just sayin'...
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