I have an 04 Mini S, with Cold-air, 15% Pulley, Alta Cat-back, and Shark Injector from Mini Mania. I dyno'd it this morning and max power was 175hp and 160 torque at wheels. The problem is Air Fuel ratio is like 9-10. From what I underdstand is It needs to be around 13. Is this correct? If so, any recommendations?

Also, I'm new to the forum, and definitely appreciate any advice. Here is a pic of my car,

I also, have 1" alta springs, rear control arms, short shifter, and wheels.

 

9-10 is rich, not lean.

I am sure somebody will chime in with a more in depth explanation.

Bill

 

thanks, thats right. Wow, your car looks great, what kind of power do you have now with all the mods done?

 

lol, you might get more exposure in the S performance forum

 

9-10:1 is incredibly rich, on the other side of the spectrum 13:1 would be considered very lean on a MCS. Ultimatly you would like to have your car somewhere around 12:1 depending on rpm load and temperature.

There is many ways to counteract the rich fuel mixture you are currently running. One would be a smaller pulley, add more air by throttle body
or a software package that will re-map the ECU to reflect the new parts you added.

If you have any other questions or like to discuss the options that I just gave you, feel free to call us here at M7.

peter
Team M7
562-608-8123