[Henry Schmidt]

Oh John
This board is read by hundreds if not thousands of people.
Please don't take my "head in the sand " comment personally. It was my intention to shine the light of day on everyone who buys into performance legend without reasoning through them.

As for back to back dyno testing. All that testing was done years ago (by the factory and others) when air cooled Porsche engines were still a viable racing option. You don't really believe that the Porsche factory didn't (double negative, sorry) dyno test fan output at varying speeds do you? If you believe they did extensive testing on their racing engines you have to believe the small fan turning at slow speeds is the best option. I say this because [I repeat] all vertical fan 911 based factory race engines ran this way.

It's the same thing with boat tailing. This nonsense has permeated the Porsche performance world for years. Where's the back to back testing? We did it back in the 80s and boating makes no measurable difference. Using the fact that the factory did back to back testing and never did the boat tail modification perhaps we should lay this to rest also. But no, the "head in the sand" people prevail and boat tailing runs rampant.

I can shine the light of day but everyone must open their eyes to see.