For the past few months I have thought there was something wrong with my truck. It seemed to be down on power. My friends thought I was crazy. Had some low dyno numbers etc, but I think it might just have been me being paranoid. This past weekend I decided to enter my truck in a sled pull event. I entered my truck in the work stock class. There was 19 trucks and I pulled 2nd to last. After watching all the Duramaxes and Cummins, which seem to always dominate the class, pull, I thought I'd be lucky to finish in the top half of the class excpecially with my 35" tires on 20's. To my suprise I won third place!!!! I stapped my front end with a 1" rachet strap which broke off in the first 5 feet when the front end started hopping. I had to lift off the accelerator and then mash it back down once the hopping stopped. My friend, who is a Duramax guru said he knows the 2 that beat me probably have over 500 hp and told me mine had to have close to 500, not the 390 it dynoed a couple months ago. I am very pleased at the results. They made the top 5 trucks tech their turbo after the event. I really think it was going from stock wheels and tires to the 35" on 20's that made it feel slower.
Your truck sounded great! It almost looked(and sounded) like you let off during the last 20 feet, or did the sled just drag you down that fast? Very impressive for your first time sled pulling. What tune where you running, SPD?
I have a MTW Stage 1, 155/30 injectors, Was running my SPD tune and Hercules FICM tune. It did drag me down at the end really fast, I think alot of that had to do with the 35's and 3:73 gears. Thinking about running a set of 265/75/17's BFG's that I have on a spare set of wheels. My friend says that might get my MPH up and help me out at the end. I have pulled before but its been 4 years when I had my D-Max. Kinda feel hooked again. Next time I'm going to strap the front end down with at least a 2" strap. If I can get the front not to hop in the beginning, I think that would also help me out.