I bought a 2871 CHRA a few weeks ago, wondering what some of you mt people think. I need both compressor and turbine housings. Goal is maxing out this turbo, 350-400 whp I'm hoping.

Compressor housing:
Is the 4" inlet housing worth the extra money compared to standard? Like this:
http://www.atpturbo.com/mm5/merchant...egory_Code=GCH

What about 4" inlet and 2.5" outlet for $10 more:
http://www.atpturbo.com/mm5/merchant...egory_Code=GCH

Turbine:
I don't need tial housing as this is mostly a street car, but I am interested in external wastegate for more efficiency. How are the flow characteristics of a standard housing with the wg flapper welded shut compared to a true external one like this:
http://www.atpturbo.com/mm5/merchant...egory_Code=GTH

And I'm thinking I should go with the .86 A/R.

 

.63 T3 housing...

 

The turbine housing you posted there looks like it will work great!

Twin scroll housings respond differently than single scroll. With a proper manifold it would spool FAST too.

 

Was planning on putting this on a T2 flange undivided manifold. What about using this housing:
http://www.atpturbo.com/mm5/merchant...egory_Code=GTH
Says it flows like a T3, and then I wouldn't have to modify the mani for wastegate, thoughts?

 

If it were street I would do a twinscroll .63. It would shred.. Much more than anything necessary on the street LOL..

 

Having trouble finding a housing like this, is it an evo x housing like in your build?