Originally Posted by Franc Rauscher

That is why you must set a base line and then use the same dyno and tuner to have an accurate picture of the change made to the engine. Even if the baseline is incorrect, the change is correctly measurable. So a 25% WHP improvement off the same dyno can be applied to what ever Engine spec the manufacturer published. Assuming, of course, IT is accurate you can reasonbly predict your new Crank HP...