I just got in my programmer. I have researched and found from most people that the diablo sport is about the best programmer you can get, or at least one of the top ones. I am applying a tune to my 03' Cobra, has a pulley, intake and a few other things. I mainly got it to tune it up for the pulley. My question is, for the more knowlegeable guys out there, is this sufficient. I have heard that it is not, and i need to just go get a dyno tune. Why isnt this good enough? What is it that the dynotune does that is better? How much does a good dynotune cost? Any opinons, good bad or in between are happily welcomed. See, i am new at this, and the more i know.... basically, the less i will spend on a new motor.

 

If those mods you have listed are the only ones, then I would say that there should be no problem with the Diablo tune. If you start really getting into the engine such as overboring and cam swapping, then a dyno tune would probably be better. The dyno measures your actual rear wheel horsepower and can provide you with a tune to maximize the performance of any "major" mods.