quick question
Thread Starter
3rd Gear Member
Joined: Dec 2006
Posts: 500
From: California
quick question
so i got the C&L CAI and tune from brenspeed, i'm currently running their 91 tune. i thought i would get better gas mileage, hopefully in the 22's. before getting everything, i got around 20 mpg. right now after everything, i'm only getting 17-18 mpg. i'm not sure if it is because i'm on it more or if i'm actually losing mileage. i don't get on it more now than i used....any reasons?
4th Gear Member
Joined: May 2006
Posts: 1,207
From: Nutley NJ
RE: quick question
You are probablyusing more fuel because of the way brenspeed sets the throttle control. The stock tune is set so that WOT is achieved when the gas petal is floored. Brenspeed sets it so that WOT is about half way down to the floor. This just helps throttle responce and you can have brenspeed tune that out, or just learn how to drive the car a littledifferent with less gas. In other words you are gettin on the gas more, just not intentionally. Just my view on it.
5th Gear Member
Joined: Mar 2006
Posts: 3,095
From: CO
RE: quick question
actually i beleive we reach WOT at about 80% of the pedal travel. Your car has to get used to the new setup. Your ECU has to "learn" so to speak and so do you. Once you get used to it and all the kinks work themselves out you will probably see about the same mileage you saw before. Also keep in mind, if you have seen a big rise in temperature in your area you will lose some mileage/power because your engine becomes less efficient
5th Gear Member
Joined: Oct 2005
Posts: 3,678
From: Southern California
RE: quick question
do the tuner guys make a "high MPG tune"? hows the weather in SD? i'm heading there this weekend. not sure if i'll be taking the stang though. don't want anything stupid happening to it with my drunk friends and the chicken headed girls.[&:]
Thread Starter
3rd Gear Member
Joined: Dec 2006
Posts: 500
From: California
RE: quick question
ORIGINAL: Sancho805
do the tuner guys make a "high MPG tune"? hows the weather in SD? i'm heading there this weekend. not sure if i'll be taking the stang though. don't want anything stupid happening to it with my drunk friends and the chicken headed girls.[&:]
do the tuner guys make a "high MPG tune"? hows the weather in SD? i'm heading there this weekend. not sure if i'll be taking the stang though. don't want anything stupid happening to it with my drunk friends and the chicken headed girls.[&:]
well, i'm a little bummed out now because of this. when i called the guys at brenspeed, they said i should get better mileage with the 91, enough to offset the cost...hasn't happened yet and i'm on my third tank. i'll give her two more tank fulls and watch my foot, if i don't see better mileage i'm going to call justin at VMP and get an 87 mileage tune and when i plan on having some fun i'll just switch to the 87 tune from brenspeed when i want to have some fun.
@8cd
would temperture rise effect gas mileage by about 3 mpg?? it's gotten warmer down here, but not that much.
2nd Gear Member
Joined: Dec 2006
Posts: 278
From: Boise, Idaho
RE: quick question
so i got the C&L CAI and tune from brenspeed, i'm currently running their 91 tune. i thought i would get better gas mileage, hopefully in the 22's. before getting everything, i got around 20 mpg. right now after everything, i'm only getting 17-18 mpg. i'm not sure if it is because i'm on it more or if i'm actually losing mileage. i don't get on it more now than i used....any reasons?
I also tried and ran with their 87 tune for a while and got less of a gain.
Other issues that may help .....
I talked to Brent and bumped my 0-2000 timing by +2 and that helped out mileage as well as take-off..
Your MRT aeroturbine, is designed for max airflow/purge of the exhaust manifolds for max HP at expense of backpressure that will effect mileage ...Did you get the tune with the aeroturbine figured in?
I swapped out transmission fluid, diff fluid and engine oil to Royal Purple and the whole thing runs slicker=less friction=more better everything
Slight difference in 2007, 2006 model vs 2005 model in specs/ ports and throttle body/ throttle position sensors may require an actual SCT dealer DYNO tune to max it out for your particular car/fuel/altitude combo..
5th Gear Member
Joined: Oct 2005
Posts: 3,678
From: Southern California
RE: quick question
damn[&:] it would be nice if VMP coordinated with diablo. i would love to get a MPG tune. i'd really like to have this tune along with race and torq on my programmer. does doug make a MPG tune?
Thread Starter
3rd Gear Member
Joined: Dec 2006
Posts: 500
From: California
RE: quick question
ORIGINAL: billybix76
I am running same set-up, Bspeed 91, C&L. I was seeing 25mpg all aound before and 26.5 after. (best highway was 31.9! with cruise set at 75 on a flat road cool day) I would keep after Brent, karen or Mike about the 91 tune. It should get you around 25mpg...
I also tried and ran with their 87 tune for a while and got less of a gain.
Other issues that may help .....
I talked to Brent and bumped my 0-2000 timing by +2 and that helped out mileage as well as take-off..
Your MRT aeroturbine, is designed for max airflow/purge of the exhaust manifolds for max HP at expense of backpressure that will effect mileage ...Did you get the tune with the aeroturbine figured in?
I swapped out transmission fluid, diff fluid and engine oil to Royal Purple and the whole thing runs slicker=less friction=more better everything
Slight difference in 2007, 2006 model vs 2005 model in specs/ ports and throttle body/ throttle position sensors may require an actual SCT dealer DYNO tune to max it out for your particular car/fuel/altitude combo..
so i got the C&L CAI and tune from brenspeed, i'm currently running their 91 tune. i thought i would get better gas mileage, hopefully in the 22's. before getting everything, i got around 20 mpg. right now after everything, i'm only getting 17-18 mpg. i'm not sure if it is because i'm on it more or if i'm actually losing mileage. i don't get on it more now than i used....any reasons?
I also tried and ran with their 87 tune for a while and got less of a gain.
Other issues that may help .....
I talked to Brent and bumped my 0-2000 timing by +2 and that helped out mileage as well as take-off..
Your MRT aeroturbine, is designed for max airflow/purge of the exhaust manifolds for max HP at expense of backpressure that will effect mileage ...Did you get the tune with the aeroturbine figured in?
I swapped out transmission fluid, diff fluid and engine oil to Royal Purple and the whole thing runs slicker=less friction=more better everything
Slight difference in 2007, 2006 model vs 2005 model in specs/ ports and throttle body/ throttle position sensors may require an actual SCT dealer DYNO tune to max it out for your particular car/fuel/altitude combo..
2nd Gear Member
Joined: Dec 2006
Posts: 278
From: Boise, Idaho
RE: quick question
what i want to know is how you got 25 MPG originally. i was lucky to get more than 22
Also driving habits matter....A LOT.. when do you usually shift? I try to shift at 2000-2350 rpm to save gas and be as smooth as possible (except when that cheesy ricer next to me tries to cut me off....)