for those of you who have this guage.. i was lookin through it yesterday and changed my horsepower adjustment from 100 (stock setting) to 220 which is probably around what i have and then everything was way off, can someone tell me what it should be set at?

 

I've been told 100 is the correct setting.

 

It's not a total HP setting, it's a coefficent applied to the calulations for HP. 220 tells the gauge to multiple the estimated HP by 2.2 so you should read like over 400 HP.