Thread: Narrowband or wideband o2?

I would go with the wideband....especially if you are going to the 3.4 setup you will need a tune.

narrowband sensors are only accurate when close to stoichiometric, they can only tell you when you passed the target afr not where you are at the present time. Once you go wot you will be out of the narrowbands range making it pointless to monitor afr unless you are close to stoichiometric (14.7 afr). Now a wideband can monitor anything from 8:1 to 20:1 afr and will tell you where you are at the present time.