Does anyone know how does Hi/Lo works? Why specII needs Hi / Lo, why not just Hi?

Thanks

 

Doesn't really matter I think. Just an extra mode. Hi/Lo/Off as opposed to hi and off.

it's a self explanitory switch. It switches between the hi and low settings. It's as simple as that.

 

There are actually three settings. Off/Low/Hi. Off bypasses the solenoid so that you can run directly off the wastegate spring. Low is your low boost setting for anything over what the wastegate spring can supply. And Hi is your high boost setting for anything over what you want Off or Lo to supply.

 

Steve Kan is a god with that controller. He set mine in 2 seconds.