I just got a new T3 for my d16. I have a few .42 ar compressor housings so I am porting one of them to see if I can make any noticeable changes (hopefully good ones!).

First I have opened up the inlet by taking out a step that comes out at about a 45 degree angle. I thinned the walls a little at the edge to reduce turbulence also, basically making the opening a smooth funnel shape. I stopped grinding about 10mm before the top of the wheel so i don't change anything 'internally'.

I also started opening up the outlet so it come closer to matching the 2" piping I will have attached to it with a silicon coupler. The walls at the this end are really thick so there was a significant step from about 1.3" to the 2" pipe. I am blending this back a couple inches. I plan on leaving about a 1/8" thick at the rim to reduce any turbulence from the abrupt increase in diameter.

Anyone else tried this? any results?

 

Not one person has tried this or even wants to say it's bad or something.....come on I want to learn more!

 

might help a little....your better off porting your exhaust housing i think....

 

Ya turbine housing and WG housing are done already I'm just hoping smoothing the compressor housing will make run a little cooler charge because of the reduced turbulance. I don't really know what to expect.