Dyno Tuning?

I use dynos for final numbers (validation), that's about it. (I'm assuming you mean chassis dynos) If you think there is a problem, some testing will give you a better idea than dropping $100-150/hr to have it flogged repeatedly. Is the car slower than you wanted? Has it been to track with real timers and do you know the true weight of it? MPH and weight is the best way to gage performance. Does it "feel soft"? If so, when ? around town, on acceleration, on the highway? A leakdown costs an hour's labor, and will tell you more about an engine's shape than 4 hrs on the roller. Ditto with a static compression test. I'd pay for that first.