what are you talking about??? the single scroll 12 inch runner manifold isnt even ON the dyno plot, as it performed the worst. also, you CAN do a back to back by changing manifolds. you cant do a back to back by changing housings!!! Changing the housings would not be a fair comparison becuase they would be at different A/Rs

even i dont get this?!?! i worked on the thesis for months... please dont try to push your lack of understanding on me.

 

Interesting. What are the blue and green plots (if you don't mind telling)?

 

Geoff, your graphs are not labeled, sorry I assumed the third line was of the 12 inch runner, since you stated what color the other two were. It was a logical assumption.

What I am complaining about is your may be drawing the wrong conclusions from what you call back to back testing. You swap an .82 housing in and take out the .63 and you see a horsepower gain. The conclusion you draw is all 82 housings perform better than .63 housings. This would be a mistake as I hope we all know this is not always true.

What I am saying is just because you swapped to a twin scroll and got better power you cant say it was the twin scroll design until you eliminate that you may have just improved the a/r for the setup. Which means a single scroll with same effective a/r would also achieve the same HP gain. This is what you dont seem to get.

Thats why I was saying you need to find a car that is maxing out a turbo in a single scroll design. then switch to twin scroll setup and see if you can improve the output.