2011 Silverado 6.2, stock exhaust and CAI, been playing with the tune and would like to hook up my NGK AFX, is it worth doing?
Reason I ask is I'm still running factory exhaust. As we all know, NGK states to place the sensor a minimum of 10 exhaust pipe diamaters from the engine, and there is no way to do this with factory exhaust. And placing it after the cats is a big faux pas...
My gut tells me that since I'm mainly going to be looking at WOT the cats won't be doing much anyway. According to NGK, having the thing too close to the engine will skew it as much as 2 points lean, I'm guessing that putting the thing after the cats at WOT, the reading won't be skewed as much as trying to place it before the cats.
Lastly, is there even enough gain to be had to do this? I've already leaned up the PE AFR, is the rest of the tune bad enough to warrant this?
Thanks,
Brandon