Just a quick question. I'm running a Random Tech high flow cat, and the dyno guys all use the up the tailpipe sensor. Anyone have any clue how much the A/F numbers are being thrown off since it's not a "clean" signal so to say?

 

I don't think it makes very much difference at all. Bryan was unconcerned with whether of not i was running a cat. Both times i had my car dyno'd they didn't do anything differently based on cat vs ORP.

 

Good to know!!! Thanks!