Quote:
Originally Posted by jsceash
The 997 T still has the same inherent issue with turbulence
Newton' laws of physics which apply to air as well as solid matter.
"An objects in motion stay in motion until acted on by an opposing force" The air entering the T will for the most part continue in the direction it is traveling towards the back of the T.
"Every action has an equal and opposite reaction" The air striking the back of the T will rebound into the air stream causing turbulence.
Bens design Pedro Techno Torque 1 and 2 and IPD are better solutions. The incoming air hits the flat back of the stock T and compresses before it move sideways causing not one but three turbulent areas one in the back high pressure and on the top where to low pressure accumulate at the radius to the inlet to the two exits. There are Cad test drawings showing how ineffective this is in one of these threads.
Pedro system the cheapest alternative. adds a deflector V in the back creating an actual flow Y. IPD all aluminum design is molded with the same V diverter Bens is a copy of IPDs design, which I doubt he will be allowed to sell due to patents from IPD. In the end there is about a 25% improvement in this design you can't get from the stock distribution T.
Look at the video from about 7 minutes in
https://www.youtube.com/watch?v=B-fXau-xWO8
The negative on IDP is the $795 price opposed to Pedro's or Ben's design. note the IPDs design is the same and it totally coated in epoxy inside.
https://www.youtube.com/watch?v=SneTb8-cHbo
I doubt anyone who has one of these designed systems would ever go back to the factory Distribution T. |
This is going to be technical. Sorry, it has to be. The answer is recirculation. The slow moving air that naturally forms the wedge forms a high pressure zone that diverts the incoming flow. As Newton or more precisely Navier-Stokes would tell us is that the path of a fluid particle is influenced by the forces on that particle. The high pressure of the stagnated wedge diverts the streamline of air away from the back of the "T". So the air coming in from the throttle body never "bounces" off the wall. The effect of a physical wedge is more likely to disrupt the secondary pulsation supercharging effect of the tuned plenum than it is to help bulk flow in any way. A simple flow bench test will prove this out.
I know people like to refer to detached flow as "turbulence", but it's really not accurate (It's one of those things that annoys a fluids engineer). In reality, most flow through the engine is turbulent, which means that the air particles within the freestream is not generally taking a linear path. There is more energy in a turbulent flow, which helps keep the freestream attached to a surface. This is why they make airflow turbulent at the leading edges of airplane wings with little triangles and golf balls have dimples.