Just thinking out loud here -
I have been building my own single turbo kit and will be using a 67/66, 0.85 a/r with a 3" turbine outlet.
My thoughts would be using a 3" to 3.5" transition directly off the turbine and making a full 3.5" downpipe as I have a full 3.5" exhaust as well.
Would any gains be made here or would it still be bottle necked at the 3" turbine outlet regardless of the downpipe size.
Has anyone ran a 3.5 inch downpipe or have any input on this?
I have been building my own single turbo kit and will be using a 67/66, 0.85 a/r with a 3" turbine outlet.
My thoughts would be using a 3" to 3.5" transition directly off the turbine and making a full 3.5" downpipe as I have a full 3.5" exhaust as well.
Would any gains be made here or would it still be bottle necked at the 3" turbine outlet regardless of the downpipe size.
Has anyone ran a 3.5 inch downpipe or have any input on this?