Arondale7

Excellent thread. I need to read this. Very informative. I've just invested a lot of time, $, and energy in my stage 3 2.7T tune and I'm curious what I should be looking for when trying to interpret the value swings of the wideband a/f ratio gauge. What is healthy at idle for a semi-aggressive tune? What about under heavy load? When should I back off? What patterns should I keep an eye out for to bring it back into the shop for another tune?

I don't want to detonate this engine. I cannot go into the upper RPM range at this time because I am still in the break-in period... but when I do, I want to watch my engines vitals like a hawk.

Thanks for the info...

Arondale