Options with turbo exhaust housing

[MX4]

Hi all,
I have a PTE GT35R which has the "cut" exhaust housing (as shown on the right hand side of the photo). I wanted to run a o2 mounted external wastegate but with the exhaust housing the way it is I realise this wont be possible. I really dont want to run the wastegate off the manifold so I thought I would ask here in case anyone had any smart ideas on ways I could work around this issue.

Many thanks!!

Ryan

 

[donniekak]

Fill it in with weld, and have the flange milled flat.

 

[MX4]

I wondered if that would be possible. I would be worrying about it failing though.

 

[MX4]

Does anyone else have any input?

 

[AWDPower]

Remove the wastegate flapper and weld a plug over the hole, or weld the wastegate shut. Weld a mount for the external wastgate off the front of the turbine housing, pointing down from where it meets the manifold. Here is what I'm thinking of...



It's kind of hard to see in that picture, but it should give you the idea. I'm not sure how much room or how big you wastegate is though.

 

[curtis]

You can run a o2 mounted wastegate.
First remove the arm and flapper out of the way.
Drill and tap the hole for the arm and install a pipe plug.
Then as for the gap. One way is if you have access to a mill. Have a perfect hole cut around the opening on the largest area. Then have a giant bushing made and then press it in. This is probably the best way a stainless or tooled steel bushing pressed in thats .150 thick would do fine.
Another way is just to fill it with weld, Take a flat piece of copper and put it in the exhaust exit and start welding. Then remove the copper and fill any pin holes. port smooth blend etc. I'm not sure what Precision uses for there housings but I've done this with bullseye housings and you couldn't tell it ever had a internal gate after I was done. If this is just regular cast have someone use a arc welder with a high nickel content rod. Do it slow and just do a section then wait and hour to cool then do more. If you pump to much heat into it it could crack out or warp and twist and cause problems with blades smacking where they shouldn't.

 

[MX4]

Excellent ideas there, thank you very much guys. Will report back once I get this sorted.