04-11-2008, 04:58 PM | #85 |
Camaro & Stang Enthusiast
Drives: 2011 Mustang 5.0 in Kona Blue Join Date: Mar 2008
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I know I may be preaching to the choir, however cylinder deactivation is crap in my opinion, sorry to say, and should have an on/off switch inside the car if it is in the new Camaro. I definitely want it sounding like a muscle car and not a Nissan 350z... How much more fuel efficient would this cylinder deactivating engine be over using all four cylinders? If it is only 5%-10% better on gas mileage, then it isn't worth having it on when driving around a parking lot where I want the car sounding as tough as a Mustang for example... If we ever have a hybrid Camaro engine that was silent when driving around a parking lot, you cannot call that an American muscle car by any means as well.
Last edited by Supermans; 04-11-2008 at 07:33 PM. |
04-11-2008, 09:49 PM | #86 | |
I used to be Dragoneye...
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5-10% actually adds up pretty quick, and when you're on the highway cruising for a while, fuel savings are even greater than GM's estimates. This statement confuses me: "How much more fuel efficient would this cylinder deactivating engine be over using all four cylinders?" Do you mean how much more fuel efficient it would be versus a non-AFM V8? Secondly, it probably won't activate when driving around a parking lot. Check out that video floating around here somewhere with the G8's AFM engaging. Note that at lower speeds, AFM is off, and all 8 cylinders are firing to keep the thing spinning. |
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04-12-2008, 12:34 AM | #87 |
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A sin? its part of the religion! We only know a few things that will hapen, a few things that won't. Everything else is speculation. So long as it doesn't go against a known fact, its fine.
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__________________ Originally Posted by FbodFather My sister's dentist's brother's cousin's housekeeper's dog-breeder's nephew sells coffee filters to the company that provides coffee to General Motors...... ........and HE WOULD KNOW!!!!__________________ Camaro Fest sub-forum |
04-12-2008, 01:21 AM | #88 | |
Camaro & Stang Enthusiast
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04-12-2008, 03:43 AM | #89 | ||
www.Camaro5store.com
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04-12-2008, 07:45 AM | #90 | |
Camaro & Stang Enthusiast
Drives: 2011 Mustang 5.0 in Kona Blue Join Date: Mar 2008
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I have two questions... When you are trying to break in the new car, how does cylinder deactivation affect the piston ring sealing since that is also a careful task that needs to be done early on? My other worry about cylinder deactivation is whether or not the wear and tear of both sides of the engine not occurring evenly will cause problems in the future with the engine? Thanks |
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04-12-2008, 09:25 AM | #91 |
Drives: IOM V6 RS 38808 Join Date: Jan 2007
Location: S.Detroit, Ontario
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I have a feeling that for the first year or two at least the customers will be bidding on prices for the cars the dealers are holding, not the other way around like you are thinking!!! :( Even with that obnoxious looking new Mustang the dealers were calling the shots for a long time.
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04-12-2008, 12:47 PM | #92 | |
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04-12-2008, 12:49 PM | #93 |
Drives: 3000gt VR4 Join Date: Apr 2008
Location: west bloomfield
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Gm has been running DOD/AFM engines in the trailblazers and envoys since 2003. As far a long term effect there has been non they simply shut off the fuel supply to those cylinders. I work for a chevy store in Metro Detroit and have a # of customers with the 5.3L AFM motors @ 120,000 miles plus and they are still running strong.
All DOD or AFM (same thing just depends on the year) Does is deactivate four of your eight cylinders when 100hp or less is required to propel the vehicle. In most cases even at highway speeds the car(impala) or truck(5.3L silverado's,suburbans,tahoes, and avalanche's) switches back and forth farely frequently do to road conditions(MICHIGAN, I'm not speaking for the flat parts of the country)such as up small hills your typically running all 8 cyl. and down hills cruising on just 4. In the larger vehicles simply driving into a 10 or 15 mph headwind can be enough to keep the cylinders from shutting off. At city speeds @ or under 45mph the car will only deactivate the cylnder with steady driving speed (such as cruise control or a steady foot) or coastoing to a stop. At idle and under acceleration the engine will always run on all 8 (or 6) cylinders. I have had two trailblazers with AFM/DOD and currently have a suburban. The system works great and typically gives me about the same fuel economy as my trailblazer customers with their I6 (4.2L) motors.
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04-12-2008, 01:41 PM | #94 | |
I used to be Dragoneye...
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2: When AFM activates, the valvetrain to 4 cylinders (2 on each side to maintain balance...I think) closes and stops working, the spark stops, and the fuel is cut-off. But the piston keeps moving inside. So wear will generally stay the same as a normal engine. |
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04-12-2008, 02:51 PM | #95 |
(In Z/28 Therapy)
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Hey I got you all beat...
My RX-8 gets an average of 18 mpg. I'll take anything with better gas right now. I think a Burb gets 18 even with out AFM. I'm having a little buyer's remorse from my car now. I think it will actually be a break for me getting into a Camaro next year regardless if it has AFM or not. As far as a Muscle car having AFM, it's the direction we are headed. I'm rooting for E85. I want to find out more about that.
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04-12-2008, 04:32 PM | #96 |
Drives: 3000gt VR4 Join Date: Apr 2008
Location: west bloomfield
Posts: 17
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http://www.greencar.com/features/features46
You got me looking dragon. Thanks for the extra info. I wasn't aware of the valvetrain shutting down..
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Dear God, Please let all that I own be Red and Black and fast as F@$K!! Amen |
04-12-2008, 05:10 PM | #97 | |
I used to be Dragoneye...
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Besides, this can count as you're "Learn something new everyday" for the day. |
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05-19-2008, 03:46 PM | #98 |
mmmmmm cant wait to get my own, luv V-8
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