Chia,
As I wrote earlier, I used the numbers for comparison purposes, not accurate HP readings. I knew they would be way off b/c I used 4,000 lbs as the weight. I know that I am way more than that. The truck moved a certain weight (according to the g-tech) at a certain acceleration, then the unit does the math. If I put in that the vehicle weight was 50,000 lbs and it accelerated the same speed, the computer would have told me that the Xterra had 1,000 hp. In other words the computer is only as accurate as the operator, and I already admitted that I punched in the #'s way off. The important thing is that I kept my error consistent, so I can see the approximate improvement. As you said, I would probably expect almost about 150 HP at the rear wheels.......maybe 140 or so?