What he said. I think you get the most from a dyno tuned map provided it's done right. Just like tuning a carb it's all in the one doing the work.I had an '05 V2K with the PCII, tornado intake and cobra pipes. I got it mapped at a local dealer and it ran like a bat out of hell, but it always ran real rich and afterfired a lot. I've got an '07 V2K now with the same tornado intake and PCIII, but this time I put HardKrome 2to1 Drag pipes on it and had it dyno tuned. The acceleration doesn't seem as abrupt, but smoother. The power is still there for sure, and it does not afterfire at all with the dyno tune. The more folks I talk to, seems like it really has more to do with who tunes it rather than the method.
For example, on the Suzuki C50T, I went from 45hp to 51hp. I don't recall the exact torque numbers, but I gained 1.7 ft.lbs of torque as well with the custom map over the downloaded map.I was wondering how big the percentage differences were. I running one of Thunder Mfg's maps that is for the exact combination I'm running. Thunder Mfg intake and V&H Pro-Pipe. I tweaked some of the small throttle opening settings some. It runs very nicely, 13.0, 101 mph quarter mile, and gets better mileage than it did stock. Was looking for someone who had the "correct" downloaded map for their application and then had it dynoed and how much the dyno map differed.