My attitude and SPA311 told me I could get 23 stock, and 25 adding 125HP with edge. I sure there are differences due to accuracy of the guage.... The LB7 tows real nice and cool... Pulling 9,000 pounds I ran level 3 and 4 with a light foot. That should be 75 to 90 hp..... I would stay around 900 to 1000 degrees flat land.... That is a nice engine to mod......