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Old 05-01-2011, 12:21 PM
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Stock mpg vs custom tune mpg

I'm doing an experiment om my truck trying to figure which mpg I get and so far I'm getting way better mpg on my stock tune. 13mpg in town whereas on my custom Eco tune I get 11mpg in town. Why is that? I've read and heard that you get better mpg with programmers/chips on a diesel truck but I'm not. And I'm using the same driving conditions. Thanks
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Old 05-01-2011, 01:00 PM
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You're using the wrong tunes. Most experience the mpg gains on the high HP tunes, and keeping out of the throttle. I averaged 13.3 gal on stock tuning, with the Street tune I run its 14.6. I think if you run the performance tune, you'll see what your looking for.
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Old 05-01-2011, 01:10 PM
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I can either run the innovative race tune or the performance tune or the Eco tune, Ill still get 11. I just can't get above 12 for some reason. My boss has the same tune but his is a 2006 and he gets 12.5-13mpg in town.
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Old 05-01-2011, 05:16 PM
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Mine does better around town with the stock tuning, but once I get on the freeway the higher the hp the better the mpg. Especially in hilly terrain or with strong winds. The higher power doesn't seem to work as hard.
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Old 05-01-2011, 07:32 PM
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Makes sense on the power and all. I wonder what kind of mpg I'll get towing a boat and a travel trailer on stick mode?
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Old 05-01-2011, 09:02 PM
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Quote:
Originally Posted by colo_dually View Post
You're using the wrong tunes. Most experience the mpg gains on the high HP tunes, and keeping out of the throttle. I averaged 13.3 gal on stock tuning, with the Street tune I run its 14.6. I think if you run the performance tune, you'll see what your looking for.
Then why do they all make a tune called "ECO".
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Old 05-02-2011, 03:44 AM
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Originally Posted by smokersteve View Post
Then why do they all make a tune called "ECO".
Marketing... The economy tunes all have less HP than the performance tunes, and less fueling comparitively. They therefore are also safer than a performance tune. But all the research I've done, and what I'm seeing with my proformance tune, shows me the high HP tune with a disiplined foot is the way to go.

In town, I still get better mileage tuned. But all lot of it is how you drive, I stay under 2200 rpm and 8 lbs of boost. Anything over that and I start to suffer in city.

On Edit:
Here's what I've seen with my IDP tunes: (all the same route and driving habits as possible, 65/35 highway/city combined.)
Stock - 13.3 MPG
IDP - Street - 14.6 MPG
IDP - XRace - 15.3 MPG

Last edited by colo_dually; 05-07-2011 at 05:11 PM. Reason: Follow-up for the mileage I'm seeing with my IDP tunes.
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Old 05-02-2011, 06:18 AM
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Quote:
Originally Posted by colo_dually View Post
Marketing... The economy tunes all have less HP than the performance tunes, and less fueling comparitively. They therefore are also safer than a performance tune. But all the research I've done, and what I'm seeing with my proformance tune, shows me the high HP tune with a disiplined foot is the way to go.

In town, I still get better mileage tuned. But all lot of it is how you drive, I stay under 2200 rpm and 8 lbs of boost. Anything over that and I start to suffer in city.






Then would it not be better to use a high hp tune and cut the throttle map in half, adjust the trans and call that an eco tune?
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Old 05-02-2011, 01:27 PM
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On the hwy with a race tune empty with no wind nothing, cruise on 70, I get 15mpg. Which I think is way to low.
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Old 05-02-2011, 03:07 PM
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I get better mileage running Matt's 8k tow tune than I do running his SRL tune. I drive both of them the same way but for some reason my truck likes the tow tune better.
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