hellzno

so these things really do work!!

IDIeselman

They just might.

mrpositraction, When testing, If the results differ from the theory....Believe the results and invent a new theory.

Theocoog

There's an article in this month's Car & Driver where they cut apart an Eaton supercharger. There are parts that looks similar to to yours in the Eaton. Of course the Eaton ones are nicely machined, not plastic. C&D says they function to create a more efficient air flow. And quieter operation.

sranger

Has nothing to do with flow. It is for sound dampening. I guess Ford did not want you to hear turbo whine....

19KFX4

so do we or do we not take them out? I'm all for a whiny turbo

mrpositraction

I might leave them out for a little bit. MPG went up 2 MPG. Only things changed are I removed the vortex generators and installed kn filter.

IDIeselman

Testing?

engineermike

If a compressor curve isn't exactly where you want it, you can make the compressor "act" a little bigger or smaller by pre-swirling the inlet air. This is done by installing "Inlet Guide Vanes". Going against rotation makes the compressor act bigger, whereas going with rotation makes it act smaller. I would surmise that the compressor map wasn't exactly as the Ford engineers wanted it, and it was cheaper to install some plastic turbonators than resize the compressor. What doesn't make sense is the positioning. You would typically put the IGV's as close to the compressor as possible, or you lose the effect. I haven't taken mine apart, from from what others have described, they are well upstream of the compressor. You would typically put it within inches.

mrpositraction

I understand inlet guide vanes and you did a good job explaining them. But the location like you mention is why I don't feel they would do much good. After them is a big curve in the pipes. By the time the air gets to the turbos I am sure there is very little if any "spin " left. Someone mentioned in another thread about spinning air goes around a bend better. I would think the gains would be small.

Of course these are my opinions! The article I posted and what engineermike touches in would make the most sense. Even though the location doesn't appear the best doesn't mean it isn't.

cdvaight

Think of rifling in a gun barrel. Spinning the projectile increases velocity and efficiency. I could weakly explain how this works in a turbo shaft engine but I would only cornfuse myself.

It all makes sense if you don't think about it.