So as I decide between the GT30, or the GT35 I see there is an option for "ported Shroud Compressor Housing", what does that do and so I want that?

Also if I go with the GT35, what A/R do I want? .63 .82, or 1.06?

 

Google is your friend.

http://www.xtremediesel.com/atsportedshrou...sorhousing.aspx

http://www.turbobygarrett.com/turbobygarre...bo_tech103.html

 

I got it with my new turbo it was recommend by inline pro and ptuning. I think it help with compressor surge. I don't know wha t the hell it is but I think it kicks the turbo back a bit.

 

Sounds like a good option

 

its a good option. its also known as an anti surge housing. The downside is slight drag on the intake but so minimal you wouldnt notice.

 

as for the a/r I suggest going for the .63 if you get the 35r and if you go with the the 30r then go for the .82, it will help out with top end.

 

1.06

 

any reasoning behind this?

 

I would go with the .82 minimum. It will spool 2-300 rpm later than .63 as an average, and the potential for power is definitely better.

 

i highly dont recommend this big of an exhaust side..