Question about turbo to exhaust manifold mounting.

[Motorhead]

In still trying to figure out why I had low boost with the Garrett turbo, I am wondering if I need to change exhaust manifolds. The STOCK, '07, 5.9 exhaust manifold and Holset turbo BOTH have NO partition at the turbine housing and the collector of the exhaust manifold. The Garrett GT3782 stage two turbo I mounted on my truck had the divider on the turbine housing. Anyone think this could be causing the low boost and high EGT's I had?
See this pdf of the FIRST page that shows the turbine inlet of the Holset HE351CW on my truck: http://www.myholsetturbo.com/manuals/HE351CW.pdf
This picture shows the Garrett turbine inlet: http://www.turbochargerpros.com/viewpicture.asp?partid=40-30106&code=S1

 

[Vaughn MacKenzie]

I would say going from open to divided housing isn't ideal but shouldn't create significant EGT issues. It would be worthwhile getting an aftermarket manifold since the stock unit port routing for the rear 3 cylinders is pretty poor http://puredieselpower.com/dodge-products/exhaust-manifolds/ For more of a budget choice the AFE should be a good piece http://puredieselpower.com/dodge-pr...r-ductile-iron-exhaust-manifold-46-40012.html