I will fix the pics a bit later, have to get back to the fun right now
This might not do much for the stock turbo power band except cause it to spool a bit faster but it is sure going to help with a GT25 or GTX, etc...turbo upgrade.
I tried to get some good pics of the rough casting, ridges, etc....but just could not get good enough lighting and focus inside as so dark. I cleaned it out and still no luck so you just have to take my word on this, it needs done!
Still a work in progress and the results are much more impressive than my pictures show.
Stock inlet on the end,
Two middle ports to show the difference in opening them up a bit and cleaning up the flow. I am looking at getting a flexible shaft so I can do the whole inside as well, I have a flexible color camera I will use to see if I can get better pics and do a good job deeper inside.
Left side is partially ported, it was as bad as the picture above, one on right is nearly done, at this stage at least.
Outlet was worse than it seems in this picture as porting already started.
Better now, I am testing different bits, etc, to get things smoothed up as possible.
When porting there are a few rules to doing it right, these are the simplest but very important ones.
1) always leave enough material to not weaken the part
2) always match precisely from port to port if you an ensure no offset when bolted up.
3) #2 is tough to do so an easier way it to ensure the outlet is smaller than what it feeds into and even if no lined up there is not direct flow blockage
4) match the port volume as close as you can, in this case not possible with the inner to outer ports being so different but do the best you can.
5) CLEAN it out completely before reinstall
This might not do much for the stock turbo power band except cause it to spool a bit faster but it is sure going to help with a GT25 or GTX, etc...turbo upgrade.
I tried to get some good pics of the rough casting, ridges, etc....but just could not get good enough lighting and focus inside as so dark. I cleaned it out and still no luck so you just have to take my word on this, it needs done!
Still a work in progress and the results are much more impressive than my pictures show.
Stock inlet on the end,

Two middle ports to show the difference in opening them up a bit and cleaning up the flow. I am looking at getting a flexible shaft so I can do the whole inside as well, I have a flexible color camera I will use to see if I can get better pics and do a good job deeper inside.
Left side is partially ported, it was as bad as the picture above, one on right is nearly done, at this stage at least.

Outlet was worse than it seems in this picture as porting already started.

Better now, I am testing different bits, etc, to get things smoothed up as possible.
When porting there are a few rules to doing it right, these are the simplest but very important ones.
1) always leave enough material to not weaken the part
2) always match precisely from port to port if you an ensure no offset when bolted up.
3) #2 is tough to do so an easier way it to ensure the outlet is smaller than what it feeds into and even if no lined up there is not direct flow blockage
4) match the port volume as close as you can, in this case not possible with the inner to outer ports being so different but do the best you can.
5) CLEAN it out completely before reinstall