Modified Twin Turbo Pipe

Reducing Turbulence...
Often with the move to bigger turbos that flow more air, original equipment designs can become too restrictive for the bigger power potential of the upgraded components, and they become the limiting factor. On the intake side of the engine, the "twin turbo" pipe converges the two independent air flows coming from the turbo compressors, into one large stream before entering the intercooler. The original design of this junction causes a lot of turbulence and creates flow restrictions and can sometimes even lead to turbo shuffle and hesitation under acceleration. What happens is basically one turbo is fighting the other turbo instead of reaching an equilibrium they bounce back and forth.This turbulent air flow can be seen in the first video here, there should be two separate color streams of orange and white, yet they are mixed and turbulent.





The Solution...
The simple solution to this problem is to modify the pipe with a divider plate down the middle to encourage the air to flow more smoothly. This hypothesis was put to the test by the engineering firm "Elitetech Automotive", and they made their findings public with these short videos. In the second video below, it's very clear that the orange and white smoke is nicely separated and there is far less turbulence in the stream, which means better flow, and more power. Having access to a machine shop through family I had this modification done to my twin turbo pipe and was quite pleased with the result.