boost mpg

[jphilly]

what will adding a boost kit to my m3 07 do to my mpg? i get around 23 city 30 highway.

 

[Rotus8]

Imagine this: Today, the atmosphere pushes some air into your engine. The computer adds gas to match. You add a turbo that pushes more air into the engine and the computer adds gas to match. More air = more gas = less milage.

 

[Kosh]

All depends on the way you drive. With a 2.3l disi I can manage around 25 city 35 highway. Boost gauge rocks for mpg. Keep it around 20-15 in Hg and you get good mpg. 5-15 lb boost and you see 5-10 mpg

 

[jphilly]

how much $?

 

[justa4banger]

You should be able to actually get a little better MPG if you can resisit the urge to get into boost. Just cruising the turbo makes it easier for the engine to do its job.

Problem is most people, once they go turbo, gain about 200lbs on the right foot when it hovers over the accelerator. My mustang can get 23-25 mpg, if your nice. Drive it like you stole it, and it gets 8-9 mpg and its a 2.3 ltr motor.

My ms3 gets 23ish with the wife driving it, mostly city. 26-28 on the highway for her. when i drive the MS3 i get 15 no matter what, but i got one hell of a big smile on my face.

I will say also that the DISI should be able to get better MPG than a normal fuel injection system, but i'm not for sure.

 

[WTF MATE]

Technically if you lean the car out like it needs to be, it should get more power, and you'll have better gas mileage. But yes the direct injection should technically help atomize the fuel better in the clynder resulting in better economy.