I'm with the guys saying it is invaluable for a street tune. Especially for me because I first really dove into carb tuning around the same time I got one. It's pretty easy to tune for wot reading plugs and idle with a vac gauge but it took the wideband to tell me my idle feed restrictions were too big for off idle cruising.

I used to drive on the highway to work every day and it kept my plugs clean. When I moved near work I turned into the guy changing plugs every week. Should I have seen my four corner idle settings at 3/4 turn out each as a sign of a large IFR? Probably, but I'm kinda new at this stuff.

I also like how it shows any clogged carb problems etc and I can just clean out the bowl and block instead of chasing my tail.

Having said all that, once I get my carb dialed in to my new cam I'll be taking that crazy arcade lightshow out and finishing the tune on the track.

Rdr