My friend has a externally mounted wideband he uses for his 240sx that we mounted up to my car to see how close the readings were to the stock wideband sensor. I'm currently running the "N" flash. I figure since the sensor is farther back, its prolly 0.1/0.2 ticks leaner than the stock wideband due to its location.

By in large, the car was running fairly lean, it was rock solid at 14.5 just cruising, and even under most part throttle conditions it didn't dip much below 14.0. When I got on it, it feel into the 13's around 5,000rpm and only near 7,000 did it really dip below 12.5. I was going to do a data log, but I had a issue with a lose part of my underbody difuser, so we called it a night.

I'm going to go out again and log the car in a good 3rd gear pull. but from what I could tell, it looks like the flashs have been leaning the AFR out as time has gone on. Will be interesting to see what the "R" flash does.