[quote=“Carnut,post:5,topic:38764"”]
Innovate wideband is a faster reading unit than the AEM and has larger range but you can’t beat a built in gauge/controller. I would say that the AEM is probably your best bet because when the car is lower than 10.0 AF it’s rich. Plain and simple you should never be that rich tuning on gasoline.
[/quote]
funny you say that. my speed runs 9:1 from the factory.
leaning out to even 11:1 would gain SO much more usable power. :tif: mazdaspeed