Whats the point of A.F.M? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

bongono93 · 05-22-2014, 10:26 PM

Active Fuel Management (afm) drops the cylinder count from 8 to 4 when doing just everyday things, but this feature also takes away about 26hp and about 10 lb of torque. I understand that is ment to save you money on gas. However engines with this feature have a estimated mpg of 24 and the ones without it are estimated at 24 as well! So how does it help?

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derklug · 05-22-2014, 10:29 PM

If automatics didn't have it, they would go into the gas guzzler tax range. That would hurt GM's CAFE, and your wallet.

Number 3 · 05-22-2014, 10:30 PM

It offsets the advantage of a manual transmission for FE. But the bigger advantage is it helps avoid the GG tax with the automatic in the Camaro.

KaBoom1701 · 05-22-2014, 10:40 PM

To passify the left wing ecofriendly hippies....

SSGUNNER · 05-23-2014, 11:47 AM

mikeyg36 · 05-23-2014, 01:41 PM

Quote:

Originally Posted by KaBoom1701

To passify the left wing ecofriendly hippies....

Bingo

axis · 05-23-2014, 02:24 PM

Quote:

Originally Posted by bongono93

Active Fuel Management (afm) drops the cylinder count from 8 to 4 when doing just everyday things, but this feature also takes away about 26hp and about 10 lb of torque. I understand that is ment to save you money on gas. However engines with this feature have a estimated mpg of 24 and the ones without it are estimated at 24 as well! So how does it help?

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The ones without it are manuals. It does help. You just have to do a lot of highway miles to take advantage of it. I had mine tuned out but recently put it back in, with a few tweaks. Mine is active in 6th gear ONLY and only above 65mph, I think. This way, I don't have to deal with it unless i'm cruising on the highway. After my trip to the fest, I can honestly say I couldn't tell if it was running or not. I did get 20.2mpg with LOTS of 85+mph cruising with 3.91's.

Cyber Gray · 05-23-2014, 03:06 PM

Quote:

Originally Posted by mikeyg36

Bingo

MikeOD · 05-25-2014, 06:37 AM

Quote:

Originally Posted by bongono93

Active Fuel Management (afm) drops the cylinder count from 8 to 4 when doing just everyday things, but this feature also takes away about 26hp and about 10 lb of torque.

This statement is untrue. The 26hp/10ft*lb difference is due to the engines being different. Even without AFM the power difference is the same. The L99 (auto/AFM) has lower compression and a different camshaft than the LS3 (manual/no AFM) has.

Slowhawk · 05-25-2014, 06:13 PM

I've been messing with it on my personal vehicle's. Tuned in correctly you can get 2-3mpg more on avarage BUT I see oil consumption problems when I have it tuned for that.

Taking it out,shutting off and getting a good tune you will average more mpg than having it on.

GM engineers do a real good job at tuning these vehicle's in but I do not understand why they leave so much on the table. I'm thinking they tune more for green house gasses.

bongono93 · 05-25-2014, 06:45 PM

Is the 26hp a noticeable differents?

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JamesMyBoy · 05-25-2014, 08:06 PM

I turn off the TC, and I have enough power for me!
Not planning on racing however... I just want a good looking car that has plenty of power and sounds like it.

MikeOD · 05-25-2014, 08:58 PM

Quote:

Originally Posted by bongono93

Is the 26hp a noticeable differents?

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I doubt it, since there's also a transmission difference.

The L99 car with any old driver will beat most LS3 cars down the track unless they've got some of the best drivers.

mikeyg36 · 05-26-2014, 04:49 PM

Quote:

Originally Posted by MikeOD

This statement is untrue. The 26hp/10ft*lb difference is due to the engines being different. Even without AFM the power difference is the same. The L99 (auto/AFM) has lower compression and a different camshaft than the LS3 (manual/no AFM) has.

Want to know why it has lower compression and a different cam/vvt? AFM.

05-22-2014, 10:26 PM	#1
bongono93 Join Date: May 2014 Posts: 79	Whats the point of A.F.M? Active Fuel Management (afm) drops the cylinder count from 8 to 4 when doing just everyday things, but this feature also takes away about 26hp and about 10 lb of torque. I understand that is ment to save you money on gas. However engines with this feature have a estimated mpg of 24 and the ones without it are estimated at 24 as well! So how does it help? Sent from my SCH-I545 using Tapatalk

05-22-2014, 10:29 PM	#2
derklug Drives: 12 Boss 302 Join Date: Sep 2009 Location: Grand Rapids, Mi Posts: 1,369	If automatics didn't have it, they would go into the gas guzzler tax range. That would hurt GM's CAFE, and your wallet. __________________ The biggest mistakes in life come when you know exactly what you are doing.

05-22-2014, 10:30 PM	#3
Number 3 Hail to the King baby! Drives: '19 XT4 2.0T & '22 VW Atlas 2.0T Join Date: Dec 2008 Location: Illinois Posts: 12,170 View My Garage	It offsets the advantage of a manual transmission for FE. But the bigger advantage is it helps avoid the GG tax with the automatic in the Camaro. __________________ "Speed, it seems to me, provides the one genuinely modern pleasure." - Aldous Huxley

05-22-2014, 10:40 PM	#4
KaBoom1701 KaBoom1701 Drives: 13' ZL1 Red M6 Join Date: Dec 2012 Location: I.E. SoCal (Yucaipa) Posts: 8,630	To passify the left wing ecofriendly hippies.... __________________ Mods: Roto-Fab Intake, WW Res. kit & Big Gulp Air Scoop, Elite Catch Can, ATI Super Damper & 18% OD Pulley, LF Idler pulley bracket, Metco CC breather, ID850 Injectors, Stainless Power Headers w/ ceramic coating, TR71X Spark Plugs, JMS Fuel Pump Booster, Bo White TB, Tuned by Ted @ Jannetty Racing, Ron Davis HX, D3 Reservoir, Pfadt 1" Springs, Moreno Camber Plates, ZL1 Addons Splitter guard washers, Tow Hook kit & rock guards, Hurst Shifter Billet Plus 6 Speed Short Shifter, ZL1 DRL lighting harness, ZL1 Recaro Seats.

05-23-2014, 11:47 AM	#5
SSGUNNER Chu no guat a hasa is? Drives: 14 Jeep G Cherokee Overland HEMI Join Date: Jun 2011 Location: Some where in So Cal Posts: 4,273	__________________ 11 2SS/RSL99No Longer Stock (Sold) 6/19/14:AAC Plasma DRL's \| Plug n play harness \| Elite CC \| Tint: 35% & 5% \| LED Dome light \| Show-N-Go Plate Holder \| Flowmaster AT \| C.A.I. Intake \| VMAX CNC Spiral Ported TB \| Husky Splash Guards

05-25-2014, 06:13 PM	#10
Slowhawk Drives: 1999 Trans Am Join Date: Jul 2009 Location: Bridgewater,Ma Posts: 2,017	I've been messing with it on my personal vehicle's. Tuned in correctly you can get 2-3mpg more on avarage BUT I see oil consumption problems when I have it tuned for that. Taking it out,shutting off and getting a good tune you will average more mpg than having it on. GM engineers do a real good job at tuning these vehicle's in but I do not understand why they leave so much on the table. I'm thinking they tune more for green house gasses.

05-25-2014, 06:45 PM	#11
bongono93 Join Date: May 2014 Posts: 79	Is the 26hp a noticeable differents? Sent from my SCH-I545 using Tapatalk

05-25-2014, 08:06 PM	#12
JamesMyBoy Drives: 2014 2SS/RS Join Date: Jan 2014 Location: Eastern Nebraska Posts: 451	I turn off the TC, and I have enough power for me! Not planning on racing however... I just want a good looking car that has plenty of power and sounds like it. __________________