Has anyone ever hooked up a SC X with the smaller 2.4, 2.3 pulley to a wideband o2 sensor to see if it is running lean at all?

Also any dyno proof of gains by doing this upgrade?

Has anyone done an intercooler or water injection?

I am coming from the FI world of sports cars, and just throwing on a smaller pulley without at least a wideband test seems insane.

Thanks,
Sean