How long before you get an SES light with on O/R Mid pipe?

I used Dr Gas and after 1k with MILs it came on. I could unplug MILs and battery and replug and in another 1k or so it would come back on. I finally gave up. I have since put my factory converters back on and still have CELs fr all o2 sensors. Go figure
 
I didn't get 35 miles up the road before mine came on after installing a prochamber. Then went through 3 sets of PnP MILs before I finally got the light off.
I've heard of people not getting a SES light after installing a mid-pipe but I believe eventually it will come on.

-Cale