03-16-2011, 01:01 PM | #1 |
Drives: '11 SS RS LS3 IOM conv Join Date: Mar 2011
Location: Long Island, New York
Posts: 23
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L99 active fuel management system
The L99 engine has an active fuel management system that drops the used cylinders from 8 to 4 under light loads. Are there any concerns out there over this AFM system? I am not a fan and plan to order an LS3 6 speed to avoid it. Would like to hear thoughts from others...
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03-16-2011, 01:13 PM | #2 |
Get the ls3 no afm. I got rid of my car because of AFM. You can buy a programer and turn it off along with your power tran warranty.
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03-16-2011, 01:21 PM | #3 |
376 cubic inches of fun
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There have been several threads about sticky AFM lifters, and some people don't like the sound of the switches between 8 and 4.
I have found that as the engine breaks in, these symptoms reduce, and the A6 transmission is a pleasure to drive after 40 years of shifting cars and trucks. But, when I was younger, driving an auto by choice was out of the question, so do what you like! |
03-16-2011, 01:23 PM | #4 |
Search Ninja
Drives: 2010 Black 2SS/RS A6 Join Date: Oct 2009
Location: Central Ark
Posts: 7,183
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Why are you worried about it? There are no adverse affects of AFM as it's encorporated into many other GM vehicles.
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2010 Black 2SS/RS A6
Halltech CF 102 fed GPI modded intake manifold Bo (knows) White ported TB Kooks LT's/ Dynomax VT Pfadted (springs/sways) Dyno tuned by Rhino and GPI I once parallel parked a train. |
03-16-2011, 04:32 PM | #5 |
Drives: 2010 Camaro 2SS/RS Join Date: Mar 2008
Location: S.W. Florida
Posts: 6,294
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You can turn off AFM with a tune. But if your planning on an LS3 M6, you don't have to worry about it.
But if you would rather have an automatic, then you'll want to read up on AFM/DOD. Most of us love our automatics. The L99 A6 hauls axx with just a few basic mods. So if you do want an automatic don't let the AFM/DOD scare you away. |
03-16-2011, 04:48 PM | #6 |
Psssssssssshhhhhhhhhhhhh!
Drives: under contruction Join Date: Nov 2009
Location: Marysville, Ohio
Posts: 12,996
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I had it tuned out very early on. No problems here! I love my L99.
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03-16-2011, 06:38 PM | #7 |
Drives: 550+RWHP 2010 camaro Join Date: Sep 2007
Location: wisconsin
Posts: 1,588
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first thing many l99 and truck owners do is have the afm/dod turned off,, most with no noticeable loss in fuel mileage,,
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415ci stroker, TVS 2300 Magnacharger, cnc heads, cam, yank ss3200 converter, Kooks long tubes, Bwoody true cold air kit, ZL1 Pump, magnaflow 3" cat-back, lowering springs,BMR control arms and tie rod bars, 3.73 gears, diff mounts, RX can, ADM fuel controller
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03-16-2011, 06:40 PM | #8 |
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+1
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Jannetty Racing JRE Street Package
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03-16-2011, 06:56 PM | #9 | |
TRI COUNTY TAMPA
Drives: 2011 1SS/RS VR/BLK A6 Join Date: Jan 2011
Location: Trinity, Florida
Posts: 6,277
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Quote:
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03-16-2011, 08:57 PM | #10 |
Drives: 2011 ss camaro Join Date: Aug 2010
Location: spring hill, fl
Posts: 1,705
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had it tuned...i bought a v8, not a part time v4. the difference is very dramatic.
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10/28/2010 got it
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03-16-2011, 09:09 PM | #11 |
Drives: 2010 Camaro 2SS/RS L99 Join Date: Mar 2010
Location: Edmonton, Alberta
Posts: 73
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No problems and no tunes for me. I enjoy sipping a little less fuel on highway cruises. I also enjoy my warranty.
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03-16-2011, 09:30 PM | #12 |
1,425 hp / supercharged
Drives: (2010 2SS/L99) (1999 Corvette) Join Date: Oct 2009
Location: Austin, TX
Posts: 1,104
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You can turn off the AFM by simply changing the parameters on the stock tune if you want. I've talked to three different service managers who say this will not void your power train warranty. They know people don't like it, and the only reason it's there is so the car won't be subject to the gas guzzler tax. It's easy to do with a hand-held tuner, and your mileage won't suffer unless you plan to only drive on a perfectly flat surface without accelerating. That's how they validate the EPA mileage rating, but that's not how people drive in the real world.
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"If it's too loud...well, you know the rest."
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03-16-2011, 09:45 PM | #13 |
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432 RWHP 391 RWTQ 12.37 1/4 mile on stock tires
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03-16-2011, 11:00 PM | #14 |
will tune out at 100,001 miles
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Cold Air Inductions Intake
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