Does anybody know of a site that shows how to port a turbo/exhaust housing

 

why would you do that?

 

This is the closest thing I could find http://www.slowboyracing.com/Porting.html.

The reason you port a turbo is the same reason you port a head or a manifold. There's always gains to be found by getting rid of rough surfaces/ridges usually found on cast parts. DSM'ers are known for porting 14b's and 16g's.

 

a-ha, i see. Still, I'm probly thinkin that is a last ditch attempt to squeeze out every last bit of power, like, something you would do if you had done everything else possible

 

you shouldn't be porting your turbo. Porting is where you actually take material off the surface to make the area bigger. You want to just polish it to get rid of imperfections and smooth the surface.

People port and clip turbos that are out of their efficiency range in order to get the maximum amount of power where a larger turbo would be the best and most efficient option

 

whitey, go to the link i provided. The housings are clearly enlarged and I know of quite a few dsm'ers that "port & Polish" there turbos. I also know of a lot of greddy users that also port their wastegates to try and rid some of the infamous greddy boost creep.

 

I understand why you would want to open up the wastegate but I can't see porting the snail all that much. I do know for a fact that a bad port and polish job on a head can actually cost you HP so be careful.

Do you have any links to compare the dyno charts of a ported vs unported turbo?

 

I agree... I'll try to find some dynos

 

Most dsm guys port the o2 housing.