Originally posted by JonsZX2SR:
I think you are quoting some useless facts that don't relate to airflow in a TB.
"Air in a TB works more like air over the surface of a golf ball than air/fuel through a jet engine. Totally smooth is not the way you want to go."
The air flowing through the TB behaves like air flowing through a tube which is what the center of the TB is. If you have golf balls in your TB you are probably going to have to repair the damage to the engine. The surface of the TB behaves more like the inner surface of bypass tubes on external jet engine hardware.
Now there are sharkskin like surfaces that you could put on the inner wall of the tube to minimize drag and improve airflow, although these structures work better with a denser fluid (liquid) than a compressible fluid like air. Slippery anodized surfaces work well enough and are used commercially.
"The beveled edge on the throttle plate I can agree with for the leading edge, but the leading edge of the TB housing I can not. Since the transition is not drawing from open air surrounding the edge, the best leading edge will result from the least amount of turbulence. A knife-edge there will create the wanted venturi effect against the silicone or rubber hose adapter going to the CAI/MAF/etc with the least amount of turbulent air. The only other way would be to eliminate this joint all together with a one-piece intake tube/TB/etc."
I have worked with aerodynamicists who have shown me that the best leading edge for subsonic flow is a complex curve, not a knife edge. A knife edge only has an advantage when it disappates the shock wave originating during transonic flow. If you have transonic flow in your TB you have an awesome engine. (sarcasm...)
In fact the inner diameter of the Iceman intake is slightly smaller than the inlet to the TB, so the top edge is hidden (the correct term is shrouded) from the airflow.
Your missed my point entirely about shaping the edge of the throttle plate so I got a good transition at 'tip-in' (throttle is just cracked above idle.) Only optimizing airflow at full throttle is not the best way to get driveability.
Anyway I built it, it has been flow tested and it works. Quit complaining.
I have been doing engineering a lot longer than you have... You need to go back to school...
I don't know half the things you said but stop being a troll. Brad has said nothing to attack you and you snap at him insulting his intelligence. We don't need that here. This is a discussion not a "I'm better than you" flame war. If that is what you want the CEG is not the place for you.
