TH6835R..4 bolt, need 3 bolt

[WildGS]

I have a turbo here with precision turbine housing with the numbers TH6835R stamped in it. Has a .68 A/R and is a 4 bolt inlet with 3" V-band style outlet.

My question is there and equivalent 3 bolt internal wastegate housing I can use in it's place?

 

[John Wilde]

I have a turbo here with precision turbine housing with the numbers TH6835R stamped in it. Has a .68 A/R and is a 4 bolt inlet with 3" V-band style outlet.

My question is there and equivalent 3 bolt internal wastegate housing I can use in it's place?

I am sure Patrick will chime in and give you the number.
I would just call Precision and order one, I am sure they can help you.

 

[RUQWKNF]

Looks like you have a GT35R turbo and are wanting a 3-bolt THB Buick style housing for it.

Bad news, it doesn't exist. PTE never made a 3-bolt THB Buick housing for the GT35R turbo. Nor does anyone else that I know of. And to my knowledge, I don't think PTE ever will. I also do not think it would be possible to remachine a different turbine housing to work with that turbo either. The only GT series turbo that PTE ever made a THB style housing for, was the GT3255E turbo. It wouldn't hurt to call them and ask, but I'm about 99.999% sure it doesn't exist. Sorry for the bad news.
Good luck with your project.


Patrick

 

[WildGS]

Thanks for the info, I bought a housing to use for mock up of my headers. The headers where originally fabbed up for a 3 bolt turbo. I am going to have to re-work the headers for the 4 bolt housing and an external wastegate.

This is what the setup looks like with the 3 bolt it won't be hard to modify for the 4 bolt version though.

 

[RUQWKNF]

Why not go with a PT6157RE or a PT6262RE?
Those two would be a direct bolt on for your setup and will make 630 & 680 flywheel hp respectively. If not enough, you could always go crazy and get a PT76 HPQ dual bb 3-bolt.
The GT35R is a nice turbo, but honestly, it will be surpassed here in the not to distant future with better designs from PTE.
Are you going to go with a N/A manifold and take the SC off the motor? Or keep it and go turbo & supercharged?

Patrick

 

[WildGS]

Well I am not sure if you can see in the picture or not but I need to relocate the turbo anyway. There is a connector for the transmission and some wiring that will conflict with the setup as is. Also I need to address some stress issues with the headers as they have cracked during previous use due to the strain of the turbo hanging off the crossover like that with no support. Also there isn't much give in the system for thermal expansion (at least this is what I am guessing, not an expert)

I think the 4 bolt and v-band setup will give me plenty of choices in turbos should I ever need to switch.

I am removing the S/C and using a N/A manifold and going to try and turn it so the inlet is at the front of the engine. I know this turbo would not be large enough to run with the S/C left in place.

Here is a pic of my turbo, thanks for pointing out what it was, I bought it used and was told it was something different.

 

[RUQWKNF]

As long as it has a dual ball bearing CHRA and water coolant passages, it looks just like a GT3582RS to me.
Yes, configuring your setup for use with T4 tangential turbine housing will open up a world of possibilities for you in the future. I would keep the AR to .68 unless you decide to build a stroker.
HTH

Patrick