Black Bear Tune

[aflumb]

so i know this has been said over and over again but i wanted to put my .02 in.

So i had the Tahoe tuned by Justin this week. all i can say is wow what a difference. i wasn't sure what i was going to get out of the tune with such min. mods (MIT/K&N filter/SLP Res delete). but the power wasn't what i was really looking for, but the driveability.
so with that the driveability is amazing now. i couldn't be happier. i never knew how much the trans and DOD affects the truck. with the DOD off i could tell right a way how much more the truck responds while in cruise. no more random downshifts with the slightest incline.

now i always calculate the fuel economy whenever i get fuel. it was a 2 hr drive to see Justin. i averaged like always a lil better than 16 mpg. now on the way back i filled back up and reset the MPG calculator on the truck. when i got home it said 18 MPGs. now with my calculation with how much fuel was used 1/8 of a tank it was spot on.

so not only did my MPGs increase. but just driving was a lot more enjoyable.

its was such a difference that even my wife noticed it. and thats saying alot

 

[White knight]

May be a stupid question, but you are getting better mileage with the dod off? Just want to make sure I understand.

 

[aflumb]

May be a stupid question, but you are getting better mileage with the dod off? Just want to make sure I understand.

yes.

 

[73shark]

Are you calculating using actual miles driven divided by actual gallons of gas put in? Or are you going off of the DIC readings?

 

[aflumb]

Both. Just fyi its n the first post

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[JennaBear]

Enjoy your tune!

 

[Bogart]

Dumb question but what is DOD?

 

[JennaBear]

displacement on demand

 

[White knight]

Also known as active fuel management in the gm world. It's when the engine shuts off 4 of the 8 cylinders.

Sorry to clog this thread about it. But why would gm put it on the trucks if they can get better mileage without?


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[TheFuzz]

Bone stock, AFM helps a little. But with the optimization justin does with the tuning in both the engine and the trans, some people see better results with it turned off. Everyone's situation is different and a lot depends on your driving style, location, and truck.

Personally, I'm beginning to wish that I had gotten it turned off. With all of the problems I'm having w/ my Airaid intake, I might get a re-tune with a different intake and have him turn AFM off at the same time.