T3 vs T4 1.06 twinscroll housings, any power/response difference?
Sep 13, 2010, 10:40 AM
#151
^^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)
Last edited by Geoff Raicer; Sep 13, 2010 at 02:22 PM.
Sep 13, 2010, 01:06 PM
#153
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?
Looks like the twinscroll shows much stronger pulse propogation into the other runner that it is tied to?
Sep 13, 2010, 10:17 PM
#158
There are some really exciting turbos debuting nov 2nd... I can't give up any specific details yet, but I recommend that you do not commit to any particular turbo configuration before that day. Ill definitely put my money on twinscroll 
ill try and get permission to post some screen shots
ill try and get permission to post some screen shots
just got rid of my 3794 to make room for one of these new twinscroll badboys!
Sep 14, 2010, 12:19 PM
#160
Sep 18, 2010, 07:25 AM
#164
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
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
Last edited by Geoff Raicer; Sep 18, 2010 at 07:51 AM.
Dec 10, 2011, 07:10 PM
#165
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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
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