Interesting.
1. I think it depends on the firm who developed that item or product in question.
It depends a lot on how much research and developement was carried out, that and as well the given parameters in which they decided to take into consideration during the developement of a architecture.
2. I think some firms fall into the pressure of having to ( push ) a product before they have completed the architecture developement. Also it is important to understand the focal point of why the part was developed and the application, racing and street ( very different. )
3. The other problem is the customer or consumer! I see it every single day, not just amongest Porsche owners. A lot of times people put parts and these parts when in conjunction exceed the potential parameters that the management is capable of supporting and so well ( in short ) the customers vehicle runs in restricted or limp like mode.
And so the management attempts to sort this out but it can't due to a lot of dynamic factors involved in which require a lot of developement to achieve a dynamic and functional formula.
But like I said, a lot of the views here interest me.
4. One last point, a lot of times performance figures are calculated across the rev range. Sometimes items or products are based on working on conjunction to achieve a total out put. Some are even peak rpm gains, so it depends.
But it depends on the philosophic approach of the firm. I also recommend discussing + and - with your specialist. Also remember not to come at the specialist sideways or sort of with a lot of bravado. Listen to what they have to say, try not to play but bla bla bla speed says, and looptie-whooptie werks says that. Qouting specs and performance and so and so did this or that makes any specialists go deaf!
^_^ enjoy!
Remember it depends if they made the parrrt to workkk with tuning of the management or wiiiith ooooouuut, as a the voice fades away off
