Active fuel management in GM trucks - Chicagoland Sportbikes
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post #1 of 24 (permalink) Old 04-08-2011, 12:02 PM Thread Starter
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Active fuel management in GM trucks

Has anyone found a way have a switch to keep tahoes, avalanches etc in V4 mode when cruising down the highway? seems like it would save a ton of fuel instead of switching back and forth to v8 mode.




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post #2 of 24 (permalink) Old 04-08-2011, 12:03 PM
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post #3 of 24 (permalink) Old 04-08-2011, 12:05 PM
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I don't think a switch is going to happen, unless you actually hack into the harness for the injectors and put a switch in there to keep them from firing.

Check out any available power programmers. They all advertise fuel economy maps. On top of advancing timing I would assume they would play with that if its possible or they have the know how.

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post #4 of 24 (permalink) Old 04-08-2011, 12:30 PM
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post #5 of 24 (permalink) Old 04-08-2011, 12:31 PM
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ha! i love that movie. its such a waste of time.

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post #6 of 24 (permalink) Old 04-08-2011, 12:40 PM
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Tony - the tahoe that Ken is drives around in has it too, and I knew the previous owner for a couple of years. In the end it got the same gas mileage as mine in day to day driving, and only slightly (1-2mpg) better on the highway. just an FYI.

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post #7 of 24 (permalink) Old 04-08-2011, 12:43 PM Thread Starter
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See ya in the Desert - RACE WARS!!!!

"And A Stand Alone Fuel Management System, not a bad way to spend Ten Thousand Dollars"

God I live that movie




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post #8 of 24 (permalink) Old 04-08-2011, 01:39 PM
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Has anyone found a way have a switch to keep tahoes, avalanches etc in V4 mode when cruising down the highway? seems like it would save a ton of fuel instead of switching back and forth to v8 mode.
I doubt it. Shutting off cylinders for economy is more complicated than just cutting fuel. The 4 cylinders that are off will cool, causing thermal stresses, and high emissions when restarted.

Most companies have a deactivation strategy, where they cycle which cylinders are cut, or strategically fire the "off" cylinders to keep them hot. Forcing this strategy to stay on when the engine is under high load, might cause additional problems.
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post #9 of 24 (permalink) Old 04-08-2011, 01:48 PM
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God I live that movie
Do you live you life a quarter mile at a time?

I know the Jeep Hemi does this, not the Dodge though. Hmmmmm.
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post #10 of 24 (permalink) Old 04-08-2011, 02:00 PM
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can't do it... what triplez said.. its basically more complicated that just a "switch"

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post #11 of 24 (permalink) Old 04-08-2011, 02:14 PM
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ha! i love that movie. its such a waste of time.
That movie has been shown to cause car cancer.

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post #12 of 24 (permalink) Old 04-08-2011, 04:11 PM
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can't do it... what triplez said.. its basically more complicated that just a "switch"
oh snap, mac11 got 0wned
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post #13 of 24 (permalink) Old 04-08-2011, 06:36 PM
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oh snap, mac11 got 0wned
you must have a problem inside your brain.

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post #14 of 24 (permalink) Old 04-08-2011, 07:17 PM
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can't do it... what triplez said.. its basically more complicated that just a "switch"
This, there is much more to the system than just shutting off the cylinders. I don't know much about the GM system but our VCM engines create some pretty wicked harmonics which have to be absorbed by active engine mounts(which fire in opposite oscillation to the vibration) and active noise control to keep the cylinder pumping sound from transmitting through the cabin. The V-TEC system is actually used to disable cylinder intake valves as well as turning off the injectors and coils. The newer cars can turn off 4 of the 6 cylinders when at light cruise but as someone else mentioned there's staging involved, it's not an instant off/instant on for any of those.
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post #15 of 24 (permalink) Old 04-08-2011, 07:54 PM Thread Starter
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you guys are thinking way to far into this. but regardless I'll look into standalone fuel managment and NOS




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post #16 of 24 (permalink) Old 04-08-2011, 08:09 PM
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you guys are thinking way to far into this. but regardless I'll look into standalone fuel managment and NOS
It will decimate all, with about $15K into the motor and we can overnight parts from Japan if we have to

Put it on your tab at Harry's

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post #17 of 24 (permalink) Old 04-08-2011, 08:21 PM
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It will decimate all, with about $15K into the motor and we can overnight parts from Japan if we have to

Put it on your tab at Harry's
it's "Put it on my tab at Harry's" said by Dom to Brian. I actually just watched the movie lol

You wanna see my itinerary?
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post #18 of 24 (permalink) Old 04-08-2011, 08:25 PM
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it's "Put it on my tab at Harry's" said by Dom to Brian. I actually just watched the movie lol
Dude, I know - Would not fit the context of me telling Tony what to do

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post #19 of 24 (permalink) Old 04-08-2011, 08:29 PM Thread Starter
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I love that we are arguing about F&F quotes! awesome!




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Government's view of the economy could be summed up in a few short phrases: If it moves, tax it. If it keeps moving, regulate it. And if it stops moving, subsidize it.

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post #20 of 24 (permalink) Old 04-08-2011, 08:32 PM
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I love that we are arguing about F&F quotes! awesome!
When you finish here, I'm gonna put a dress on ya and put ya on the street where you belong

"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming WOW, what a RIDE !!"

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post #21 of 24 (permalink) Old 04-08-2011, 08:34 PM Thread Starter
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Bahahaha




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post #22 of 24 (permalink) Old 04-08-2011, 08:36 PM
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Bahahaha
I prob mis quoted that one - Giz, how did I do?

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post #23 of 24 (permalink) Old 04-08-2011, 09:17 PM
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I prob mis quoted that one - Giz, how did I do?
You almost had me? You never had me - you never had your car... Granny shiftin' not double clutchin' like you should. You're lucky that hundred shot of NOS didn't blow the welds on the intake! You almost had me?
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post #24 of 24 (permalink) Old 04-08-2011, 10:12 PM
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