exhaust manifold question
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r71's daddy
Joined: Feb 2001
Posts: 935
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From: Atlanta, GA
exhaust manifold question
My engine came with an extra manifold when I got it. I have a T-78, with a non-divided housing.
The exhaust manifold on the engine is definately a custom job. It is not pretty, and it is not divided, but I do have the wastegate already welded on it. It made good power before with it.
The spare one looks much nicer, and of higher quality. It is divided. It has a diferent wastegate flange, so I assume that I will need a new wastegate for it.
My question: Should I see a benefit of going to the divided manifold, since my tubo housing is not divided?
The exhaust manifold on the engine is definately a custom job. It is not pretty, and it is not divided, but I do have the wastegate already welded on it. It made good power before with it.
The spare one looks much nicer, and of higher quality. It is divided. It has a diferent wastegate flange, so I assume that I will need a new wastegate for it.
My question: Should I see a benefit of going to the divided manifold, since my tubo housing is not divided?
Senior Member
Joined: Jan 2004
Posts: 341
Likes: 0
From: Colorado
Just think about it...
You have individual runners pretty close up to the turbo flange anyways. Than you expand into a common runner or collector that is about twice the diameter a couple of inches before the turbine housing. You lose velocity at this point. With a divided turbine housing and runners your velocity stays up all the way to the turbine wheel. So all you would gain with an individual runner manifold and an undivided housing is a couple of inches before the gases merge at the turbine flange anyways.
CW
You have individual runners pretty close up to the turbo flange anyways. Than you expand into a common runner or collector that is about twice the diameter a couple of inches before the turbine housing. You lose velocity at this point. With a divided turbine housing and runners your velocity stays up all the way to the turbine wheel. So all you would gain with an individual runner manifold and an undivided housing is a couple of inches before the gases merge at the turbine flange anyways.
CW
Thread Starter
r71's daddy
Joined: Feb 2001
Posts: 935
Likes: 0
From: Atlanta, GA
Originally Posted by z8cw
Just think about it...
You have individual runners pretty close up to the turbo flange anyways. Than you expand into a common runner or collector that is about twice the diameter a couple of inches before the turbine housing. You lose velocity at this point. With a divided turbine housing and runners your velocity stays up all the way to the turbine wheel. So all you would gain with an individual runner manifold and an undivided housing is a couple of inches before the gases merge at the turbine flange anyways.
CW
You have individual runners pretty close up to the turbo flange anyways. Than you expand into a common runner or collector that is about twice the diameter a couple of inches before the turbine housing. You lose velocity at this point. With a divided turbine housing and runners your velocity stays up all the way to the turbine wheel. So all you would gain with an individual runner manifold and an undivided housing is a couple of inches before the gases merge at the turbine flange anyways.
CW
development
Joined: Aug 2002
Posts: 5,714
Likes: 7
From: Lafayette, LA
Originally Posted by David88vert
My question: Should I see a benefit of going to the divided manifold, since my tubo housing is not divided?
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