felixgun
Full Access Member
Make sure you get approval first Felix
hardy har har guys. If you must know, she came with me to Houston, TX for my first BB Tune for le tahoe
Active fuel management mods?
- Thread starter totheyard
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
hardy har har guys. If you must know, she came with me to Houston, TX for my first BB Tune for le tahoe
- Joined
- Jan 3, 2011
- Posts
- 50,933
- Reaction score
- 19,327
hardy har har guys. If you must know, she came with me to Houston, TX for my first BB Tune for le tahoe
yes but she has a strangle hold on Le esky 
domin8
Just Plinking
- Joined
- May 9, 2011
- Posts
- 6,038
- Reaction score
- 14
Now I'm confused. Are you telling me that Felix doesn't wear the pants in his house?
felixgun
Full Access Member
True... Very very true.
mike1944
Full Access Member
Same here. 2010. Imperceptible. When I started watching it I was wondering if it was actually doing anything.
As I've mentioned before, it has to be the right circumstances for mine to kick into 4 mode: less than 45 mph and flat or downhill. Doubt it really saves that much.
99% of my miles are road miles (driving vacations) and I get usually 18 mpg.
domin8
Just Plinking
- Joined
- May 9, 2011
- Posts
- 6,038
- Reaction score
- 14
I hate when that happens. Here's a little something to help cheer you up.
http://www.youtube.com/watch?v=X3AJcgfopdk&feature=youtube_gdata_player
[yt]X3AJcgfopdk[/yt]
Last edited:
ChrisAU
Full Access Member
The biggest change Justin from BBP did to mine in terms of AFM was making it so that it would work in 3rd gear around town. We observed my Tahoe accelerating uphill in 3rd gear in 4 cyls. Not a steep hill of course ha. He also made it so that in sport mode it is completely disabled.
TowGMC
Full Access Member
I'm so glad my '09 Denali doesn't have AFM. I'm in rental Tahoes and Yukons almost every week when traveling for business, and every one of them shudders when going from 4 to 8 cyl mode. So I tend to just leave the rentals in Tow mode which kills fuel economy but at least it doesn't shudder and hesitate every time I need to pull a hill at 80 on the highway.
And FWIW, my Denali fuel economy isn't all that different from the rental Hoes, the only big difference being the cost of premium (just paid $4.49 yesterday, cost $105 to fill the Denali) vs the cost of the cheap stuff in the rentals.
And FWIW, my Denali fuel economy isn't all that different from the rental Hoes, the only big difference being the cost of premium (just paid $4.49 yesterday, cost $105 to fill the Denali) vs the cost of the cheap stuff in the rentals.
wcsmith21
Full Access Member
Justin turned off my afm and I'm averaging 15-18 mpg between highway/city. I'm running 89 octane.
Why are you guys putting 89 and 91 octane in the Denali? Mine is written that 87 is fine. Or does your new tune call for higher octane? So it sounds like the AFM does nothing for saving fuel. Just a marketing tool to sell some trucks?
wcsmith21
Full Access Member
Just what serge said. Your tune changes the octane to your preference.
93 octane tunes are usually there to get the maximum (fuel related) performance out of these engines, not fuel efficiency ... but one doesn't really get a tune just to use 93 octane, it's simply one part of a tune customized to meet one's overall needs.
Norman, honestly the best way to do this is simply to get yourself set up for a BB tune, and tell Justin exactly what you want in general terms. For example you can say I want to make my vehicle as fuel efficient as possible whilst using the lowest octane fuel ... they will tailor your overall tune to that end, including shift points/octane rating/etc.
Norman, honestly the best way to do this is simply to get yourself set up for a BB tune, and tell Justin exactly what you want in general terms. For example you can say I want to make my vehicle as fuel efficient as possible whilst using the lowest octane fuel ... they will tailor your overall tune to that end, including shift points/octane rating/etc.
felixgun
Full Access Member
You can get the 87 octane "fuel economy" tune or the higher 93 octane tune which will add more HP and give more of a performance boost.
TowGMC
Full Access Member
Even before my BB tune, there was a very noticable difference between running regular and 93 octane. When running regular, throttle response on the highway was definitely poorer. And on two long trips when I ran 89, fuel economy was off 1-1.5 mpg.
Hey, at least I get 93 octane here in Illinois, sorry CA folks.
Hey, at least I get 93 octane here in Illinois, sorry CA folks.
Similar threads
