zu l8r : ive been reading ur post..so let me get this straight, if i have utec, and soon to be giong st tn on my car, do i have to get the utec tuned in a certain way? i plan on using defi boost and wideband with control unit..im lost as well

 

No other wideband will hook DIRECTLY up to a UTEC. All this means is you can't datalog the A/F on a dyno through the UTEC. You have to log in on the dyno itself and try to compare engine speed @ certain points and try to do it that way. It kinda sucks. I refuse to buy the TXS wideband though cause I don't want a big box for a guage in my car. In the utec upgrade thread it explains how it can be done with the AEM wideband but you need to have some more cables, another program, and a laptop to run it all through. You'll need a TXS map sensor to get the boost reading to the utec itself and the Defi guage will work fine for a in-cabin guage.