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Thread: active fuel managment
06-04-2011, 12:41 PM #41
- Join Date
- Jun 2010
- Sunny San Diego.
I think the problem with AFM as a whole is the highway speeds of today. When I had AFM activated and was cruising at highway speeds (let's say 65 for shiggles) I spent far more time in 8 cyl mode than I did in 4 cyl mode. I think there ought to be a software update for that, but I hate most things electronic anyway.
Adam - Wherever the Navy puts me
2007 Chevy Silverado Regular Cab
22x10 KMC LO-FI w/ 305/40R22 Yokohama Avids
Ground Force 2"/4" Lowering Kit
Eagle Eye Projector "Halo" Headlights
RECON smoked tail lights
RECON smoked third brake light
5.3L V8 Flex Fuel
Banks Power Ram-Air Intake
TEA Stage 1.5 Heads
Comp Cams 54-450-11
Dynatech Full Length headers
Dynatech Intermediate pipe with hi-flow cats
2.5" Single-in, Dual-out Magnaflow muffler
306 ft-lb torque
06-04-2011, 06:52 PM #42
I agree with what hot rod was saying( i think). On my truck it seems that tha AFM kicks it into 8 cylinders a little too early sometimes. Like when driving on fairly flat roads and barely picking up the throttle, it almost instantly goes to 8.2008 Silverado LT 5.3, Rancho 4", 18x9 XD Addicts, 295/70/18 Nitto Trail Grappler m/t's, Westin brush guard, Go Rino steps, Truxedo lo pro cover, magnaflow, tow mirrors.
06-05-2011, 06:47 AM #43
kinda makes me glad i have a 05. dont have these issues.
corse my mileage may suffer a bit for it, but thats ok, i bought a truck not a car.
2011 GMC Sierra SLE 5.3 Z71 4X4 Stealth Gray Metallic
Tow mirrors - Diablew Tuned - Flowmaster Regular 40 - Ready Lift 2.5' lift - BFG LT A/T K/Os - Carr Light Wing - TruckLite LED lights - Optima Red Top - 50% Front Window Tint - Line-X bedliner - Aidaid MIT - Tekonsha P2 - ARS Billet Grill
06-05-2011, 07:28 AM #44
well here is my discovery i installed a diablo predator on the diablo tune setting,i use 91 octane fuel my truck has 31" tires, i shut off the afm,set the tire size, shut off the speed limiter and the truck gets 21 mpg...... it is a 2008 silverado 4x4 ec/sb with a 5.3l 4l60 trans and 3.73 gears.... i just plug and play so this is real world.the truck has a magnaflow catback and a drop in k and n filter no other mods..........yet. hehehehe. hope you guys find this info useful!!2008 chevrolet silverado ec/sb 5.3L Z71
magnaflow dual cat-back exhaust
chrome mirror and door handles
stainless tube steps
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