Have you had any surging with this Turbo expesially when your lugging and you roll into the throttle?
No surging. I've even tried to get it to surge by lugging it, but no dice. This thing is about as smooth as any thing you could ask for.
On another note, today my mom needed me to change the oil in her Escalade, so she brought it over to the house. I drained it, removed the old filter, but when I started to install the new one I noticed it was the wrong filter. My wife was about to leave in her car and I can't let anyone that isn't an employee drive my company vehicle, so that left my truck. I gave her the keys and her filter to go get another one. I didn't program it back to stock or to a lower HP tune, just let her go in what I believe to be a 490-500rwhp truck. Didn't say anything to her about my "tests" as she was now a subject. All I asked was that she allow it to cool to at least 400*EGT before shutting down and wait for the glow plugs to cycle before cranking up.
When she got back I hit her with a bunch of questions about her driving experience. I asked how it felt and what she thought about the throttle response. She said, "It feels good, you push the accelerator and it just goes. It drives very well. It feels smaller than it is." She also commented that it's easy to get moving too fast. Keep in mind that over the last 16 years my mom has owned a Mustang, 2 Trans Ams, 2 Escalades and a 2006 Corvette. She knows what quick throttle response is.
To me, this says a couple different things. 1, If the truck was laggy on the bottom end, she would've noticed it. 2, Chris's tunes are great. They work awesome with this turbo. Drives like a gasser till' you hit the skinny peddle, then it takes off like a raped ape and leaves the gasser's in the dust. This turbo and the SPD tune are a great combo for those of you looking to make a purchase from MTW. 3, The turbo works well enough to provide a smooth consistent daily driver and enough power to head out to the track or smoke anyone who decides to pick a fight on the street.