Not to disagree here, but JohnZX2SR is onto something here. His approach is different, but it's still very valid esp. in regards to the knife edge vs. rounded edge on the leading edge of the butterfly. Think of how air accelerates around a wing...
Also, the smooth vs. dimpled surface argument is a bit different in this example than when we talk about porting cyl. heads which is where the "golf ball" analogy comes up most often. Smooth intake ports are not desirable due to fuel "sticking" and "puddling" to the smoother surface - not being suspended in the air like it should be for good combustion. In a non-fuel environment like a TB a smooth surface might not be a bad thing.
John also has the flow #'s to back up his claims along with what appears to be the technical background.
And despite popular opinion in this thread, I don't think that he came in here bashing Brad or Brad's work. He just was presenting his solution to the problem. Who know's if Brad's optimization is the best or most complete solution anyway? It's based on sound principals (hell I did most of what he did to my TB) but so are John's. Let's have a dyno shootout!
I'm sure Brad's TB's are still under development, as he's only worked on a handfull so far. Rome was not built in a day..it takes time to perfect anything good.
I know Brad has financial interests here and I'm not trying to steal his thunder but sometimes people have to ask questions in order for progress to be made. That's what Brad has done in the past (look at his remarkable track record w/the Contour) and I would expect no less of him now. Just don't be blind to another viewpoint here, thats all.
Oh, and I John isn't a troll. A troll is someone who makes some outragous claim (hooks the bait) in order to reel some suckers into a flame war. I saw nothing of the sort in Johns post.
Whew, rant off I guess...
