Originally Posted by tom @ eas
Rapture's car simply kept making power dyno pull after dyno pull once the S2 was installed.
Call me a skeptic, but that is one of my jobs around here... This sounds like a systematic error rather than power gains...
1. Either the engine adapts immediately to the mods or doesn't.
2. If it does it should not continue to make more power each run. Thus the conclusion is bad dyno results.
3. If it doesn't then you could only see this if it adapted very quickly.
As is typical - there are many ways to spin dyno data. It is often as good as we want it to be when the levels are basically in the noise. We would not be having the discussion (well... unfortunately we probably would be..) if the claimed gains from another modification, say modification "X", were dyno proven to be 2-3 hp.