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Afm V/s Non Afm 5.3 - Physical Differences With The Engines?

ZQL8TR

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ZQL8TR New Member

ZQL8TR

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Where I'm going with this is I am ordering a 5.3L Colorado soon and would like to enable AFM with a custom tune if at all possible since I commute almost 60 miles a day. Are there any physical differences between the AFM 5.3 and the non AFM 5.3, or are they the same aside from the PCM program?

Darkanion Senior Enthusiast

Darkanion

Posted
Posted

There is extra hardware. I don't remember what all it is, though. You can't just "turn it on in the PCM,", though. You need the extra hardware, too.

 

Are the Colorados w/ the 5.3 not coming with AFM? That surprises me, if not.. That seems like an easy way for GM to boost their MPG #'s.

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
Where I'm going with this is I am ordering a 5.3L Colorado soon and would like to enable AFM with a custom tune if at all possible since I commute almost 60 miles a day. Are there any physical differences between the AFM 5.3 and the non AFM 5.3, or are they the same aside from the PCM program?

 

Yes, they have special lifters and solenoids to activate/deactivate the cylinders/valves. The Valves remain closed during deactivation.

 

Don't even waste your time looking into it. It will NEVER pay for itself.

2000DV4.8 Senior Enthusiast

2000DV4.8

Posted
Posted
Where I'm going with this is I am ordering a 5.3L Colorado soon and would like to enable AFM with a custom tune if at all possible since I commute almost 60 miles a day. Are there any physical differences between the AFM 5.3 and the non AFM 5.3, or are they the same aside from the PCM program?

 

Yes, they have special lifters and solenoids to activate/deactivate the cylinders/valves. The Valves remain closed during deactivation.

Don't even waste your time looking into it. It will NEVER pay for itself.

 

 

While I definitely agree it wouldn't be worth the time & money, it seems like it would be much more effective in the smaller, lighter Colorado/Canyon than in the fullsize trucks.

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
While I definitely agree it wouldn't be worth the time & money, it seems like it would be much more effective in the smaller, lighter Colorado/Canyon than in the fullsize trucks.

 

 

Yeah, I agree, but that aint sayin much. :D

Zembonez Senior Enthusiast

Zembonez

Posted
Posted

AFM overcomplicates the engine for a very minimal boost in economy. Just wait until that stuff starts breaking! Holy Cow!

Darkanion Senior Enthusiast

Darkanion

Posted
Posted
While I definitely agree it wouldn't be worth the time & money, it seems like it would be much more effective in the smaller, lighter Colorado/Canyon than in the fullsize trucks.

Yeah, that's a head-scratcher for me.. There must be some sort of physical space limitations or something. That seems like a real easy way to boost mileage in a more meaningful way... :D

2000DV4.8 Senior Enthusiast

2000DV4.8

Posted
Posted
While I definitely agree it wouldn't be worth the time & money, it seems like it would be much more effective in the smaller, lighter Colorado/Canyon than in the fullsize trucks.

 

 

Yeah, I agree, but that aint sayin much. :D

 

 

Agreed.

 

And look at who's posting in this thread, and how fricken long we managed to stay on topic! :lol:

alaska511 Senior Enthusiast

alaska511

Posted
Posted
AFM overcomplicates the engine for a very minimal boost in economy. Just wait until that stuff starts breaking! Holy Cow!

 

 

Pete, is that you??

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
AFM overcomplicates the engine for a very minimal boost in economy. Just wait until that stuff starts breaking! Holy Cow!

 

 

Whatever makes ya feel better about that "sissy" little 4.8 Jim. :D:lol::)

Zembonez Senior Enthusiast

Zembonez

Posted
Posted
AFM overcomplicates the engine for a very minimal boost in economy. Just wait until that stuff starts breaking! Holy Cow!

 

 

Whatever makes ya feel better about that "sissy" little 4.8 Jim. :D:lol::)

 

Well... I'm just glad we got that straight Jeffrey. :D

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