HX35
Senior User
Joined: Feb 2012
Posts: 445
Likes: 6
From: western Oregon
Yes there is some advantage to a true twin scroll system. they spool just a bit faster from consistant pulse from the seperate pipes into the exhaust housing. If you change the up pipe to be better shaped Y you will be ahead of the game.
Hotshot
Joined: Oct 2002
Posts: 18,488
Likes: 22
From: The Big, Oregon
Pulse timing and balancing them into the turbo will make a difference in efficiency, but not enough to matter a whole lot in an application like this. If you have a smooth y then it'll help quite a bit. There is an odd cylinder out on each side so you would need some really fancy headers to time the pulses all into the turbo evenly with a fully dual-path setup. Something like this:
For our purposes, if you bring the two sides together before the turbo and have a sort of collector for both sides, it will even out the pulses and make for more efficient operation.
For our purposes, if you bring the two sides together before the turbo and have a sort of collector for both sides, it will even out the pulses and make for more efficient operation.
Senior User
Joined: Feb 2012
Posts: 445
Likes: 6
From: western Oregon
Ya I agree not a problem to spend that much effort on. Its hard enuff just to plumb the exhaust to the turbo and back down to the exhaust pipe in that small area in a truck. I'm real lucky to have all the room to do my system. I can open the engine cover/bed in the MotorHome and sit on the trany and work on the turbo super easy.
Thread Starter
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Senior User
Joined: Feb 2012
Posts: 359
Likes: 0
Ya I agree not a problem to spend that much effort on. Its hard enuff just to plumb the exhaust to the turbo and back down to the exhaust pipe in that small area in a truck. I'm real lucky to have all the room to do my system. I can open the engine cover/bed in the MotorHome and sit on the trany and work on the turbo super easy.
That will have to be first on the list as I'm sure I'll have no room to get in there and apply anything .
Lead Driver
Joined: Apr 2008
Posts: 6,938
Likes: 13
Full length custom headers that collect into the turbo flange.. Not realistic, feasable, nor would it net a whole lot imo. If going twins, sure maybe then, some custom shorties (think ricer stuff) but for a single or compounds just do eet.
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