Originally Posted by 32krazy!
do i need this? cost for a/f readings goes up to 150 for 3 pulls. am told its to cover the cost of the o2 sensers. additionally if i dont ahve a bung for the wideband 02 its an additional 50 to weld in the bung. just want a baseline. do the runs as is and log boost? or do i need a/f readings for baseline?
I've only dynoed on Dynojet's here in Las Vegas during "dyno days" and it cost $50-60 for 3 pulls with A/F readings. The only difference between no A/F and A/F readings is the little sniffer they put in the cars tailpipe. Maybe they do something different on a Mustang dyno.............or maybe the shop is just trying to gouge you because you don't know any better.

Sounds fishy to me though.