Mine came at 40% across the RPM band. I switched it up to 55% and have no driveablity issues. I'm thinking I should see a little more mileage as I was regularly hitting 40% just climbing local hills. Now I have to want to get into PE mode.

 

It should be as soon as you start coming into boost. Once it breaks the neutral barrier, it should go into PE mode. If you want to push it, push it back to when you see about 2 or 3 psi on acceleration, not when your accelerating on the highway though, more like from a light. Be sure to check for knock under a load when it starts getting to the neutral or just over the neutral area. It would be about .70 gms/sec.

 

I've datalogged it and have no knock at all. I was just happy that I may have found a place to score a little more economy all while enjoying the performance.

 

Is it actually going into PE mode later now, because the MAP enable might need to change too.

 

Stock for my truck is at 90% throttle... but I'm N/A.

Boosted motors definitely want PE turning on much sooner.