We just did an install for the next issue of Diesel Builder on a '99 F-350 with right at 200,000 miles on the new PowerMax kit from Garrett with a GTP38R. His baseline run made 238 horsepower and about 550 on torque with a Superchips (early model one). He was making 23 pounds of boost and after installing the Powermax Without adjusting the wastegate or programming he was making 19, however, it now spools up alot faster and feels strong. The ball bearing GT has an 88mm compressor wheel and the stock unit is 80mm. It feels smoother, runs smoother and whistles loud. We decided to bolt on a MBRP Cool Duals to see if we could get some good power out of it. But we will have to wait, we are going to the dyno monday to get the final numbers.
I will post them when we get back.
As for the price, I think the entire PowerMax kit is about 1800 NEW.
josh