^^it will be explained with much more detail shortly. the main thing to look at is the vector (direction) of the exhaust gas as it leaves the manifold. the twinscroll arrow's all face out of the manifold, heading into the turbo. The singlescroll gets efficiency robbing "swirls" in the exhaust gas vector (highlighted in red circle)

 

^ahh...ok I can see it now...little faded so I couldn't tell unless looking for it

Thanks!

 

This may be the first time I have ever seen CFD work that was actually relevent to manifolds posted on an automotive forum. Usually it is steady state flow, which is about as useful as flow bench numbers. A video would be killer.

Looks like the twinscroll shows much stronger pulse propogation into the other runner that it is tied to?

 

correct! this runner's exhaust valves are completely shut - so the end result is far higher pressure/force placed on the turbine wheel. the video makes this much easier to see. i will post it as soon as i can edit it

 

I cleaned up the screen shots so its a little easier to compare - check them out now. video will come later this week if all goes as planned

 

great results... cant wait..

 

Science..... is a wonderful thing.

Then again there are still people out there that believe evolution is just a theory but Geoff you might of just gained some believers!

Scorke

 

I'm sold just got rid of my 3794 to make room for one of these new twinscroll badboys!

 

can't wait till I have that money saved for this setup! T4 3586 FTW!

 

evodan loves his twinscroll 3586

 

Thats awesome Geoff. Good stuff!

Mitch

 

Cannot wait to learn more about what's coming in November!

 

After a short talk with Goeff about the new turbos I'm super stoked to see how they do as well. Put me on the list

 

thanks guys - we wont abandon the singlescroll fanatics with this new technology. Even tho twinscroll is superior for most street cars, there are many singlescroll turbokits out there where the owners just want to upgrade the turbocharger rather than the entire kit..

on a side note - this is what a singlescroll Turbo thermodynamic system maps out as when properly laid out in CFD software:


edit: i pointed out some of the major components, you can probably figure out many of the others

 

any of u guys have pics of the T4 1.06 on a 3582
i have a GT4202 over here with a 1.01 T4 its HUGEEE i wonder why , isnt it the same footprint ?

another thing, FP sells their HTA with a 1.00 T4 , where do u guys get the 1.06 number instead , is it a diffrent casting by someone else ?

thanks guys