[3000GT MR]

Originally Posted by Echoknight

Its a .68A/R

oh goodness, what size turbine wheel?

[Rob@RBTurbo]

If anyone is interested we have some extra OEM N54 manifolds (about 2-3 sets worth I do believe) we'd sell if anyone is interested in doing something like this shoot us a PM.

To the OP: We'd suggest using some Weld Els (ie. 316SS or 304SS and Schedule 10+) for material integrity, reinforce the plumbing with some supports, keep the piping from the manifold outlet to the turbo flange as short as possible, and ensure you have some high quality TIG welding performed. Then if you follow suit of the other ST setups out there (ie. pre-turbo O2s, etc); you should be able to get good performance out of this setup.

We also offer many of the fittings for custom setups like this a la carte (ie. oil feed and coolant fittings, etc).

Thanks,
Rob

[Echoknight]

Originally Posted by Rob@RBTurbo

If anyone is interested we have some extra OEM N54 manifolds (about 2-3 sets worth I do believe) we'd sell if anyone is interested in doing something like this shoot us a PM.

To the OP: We'd suggest using some Weld Els (ie. 316SS or 304SS and Schedule 10+) for material integrity, reinforce the plumbing with some supports, keep the piping from the manifold outlet to the turbo flange as short as possible, and ensure you have some high quality TIG welding performed. Then if you follow suit of the other ST setups out there (ie. pre-turbo O2s, etc); you should be able to get good performance out of this setup.

We also offer many of the fittings for custom setups like this a la carte (ie. oil feed and coolant fittings, etc).

Thanks,
Rob

Thanks Rob, I might have to take you up on that and get the fittings I need from your site.

[Echoknight]

Originally Posted by 3000GT MR

oh goodness, what size turbine wheel?

.70 A/R, I do admit I may have gone too big but this will be the benchmark for the next turbo.

Item(s) Specification :
- 4" Air Inlet
- 2.5" Compressed Air Outlet
- Ceramic Ball Bearing on Compressor Side Compressor
- Standard T4 Turbine Housing Flange
- 3" Vband Exhaust Outlet
- 400-600HP
- Oil Cooled
- Working Pressure: 8-30 PSI
- 0.70 A/R Compressor
- 0.68 A/R Turbine
- Compressor Wheel (Major/Exducer) 76/60mm
- Turbine Wheel (Major/Inducer) 64/58.2mm

[3000GT MR]

Originally Posted by Echoknight

.70 A/R, I do admit I may have gone too big but this will be the benchmark for the next turbo.

Item(s) Specification :
- 4" Air Inlet
- 2.5" Compressed Air Outlet
- Ceramic Ball Bearing on Compressor Side Compressor
- Standard T4 Turbine Housing Flange
- 3" Vband Exhaust Outlet
- 400-600HP
- Oil Cooled
- Working Pressure: 8-30 PSI
- 0.70 A/R Compressor
- 0.68 A/R Turbine
- Compressor Wheel (Major/Exducer) 76/60mm
- Turbine Wheel (Major/Inducer) 64/58.2mm

Thats way to small for a that turbine wheel. You'll make a lot of boost fast and fall on your face in the upper end. Ideally you'd want a .82-1.xx. The bigger the wheel the smaller the AR (vice versa) unless your going for major top end.

[HouseN54]

Originally Posted by Echoknight

.70 A/R, I do admit I may have gone too big but this will be the benchmark for the next turbo.

Item(s) Specification :
- 4" Air Inlet
- 2.5" Compressed Air Outlet
- Ceramic Ball Bearing on Compressor Side Compressor
- Standard T4 Turbine Housing Flange
- 3" Vband Exhaust Outlet
- 400-600HP
- Oil Cooled
- Working Pressure: 8-30 PSI
- 0.70 A/R Compressor
- 0.68 A/R Turbine
- Compressor Wheel (Major/Exducer) 76/60mm
- Turbine Wheel (Major/Inducer) 64/58.2mm

if it was twin scroll id offer him to buy my 5862 cea so i could pick up a s366

[shadow191]

Rob makes some great points. How do you intend to brace the piping? The pics look like regular thin wall piping so it needs some sort of bracing I'd think. I did something similar on a previous car. Used regular piping similar to yours, but supported the turbo and another point on the piping itself. Never cracked.

Originally Posted by Echoknight

Thanks Rob, I might have to take you up on that and get the fittings I need from your site.

[Echoknight]

Originally Posted by shadow191

Rob makes some great points. How do you intend to brace the piping? The pics look like regular thin wall piping so it needs some sort of bracing I'd think. I did something similar on a previous car. Used regular piping similar to yours, but supported the turbo and another point on the piping itself. Never cracked.

Thinking of supporting it on either the manifold or a bracket off of the top and on to the frame rail (or whatever its called).

[Echoknight]

Originally Posted by 3000GT MR

Thats way to small for a that turbine wheel. You'll make a lot of boost fast and fall on your face in the upper end. Ideally you'd want a .82-1.xx. The bigger the wheel the smaller the AR (vice versa) unless your going for major top end.

This is great input, i was not too sure about the size and didn't want to have to take forever to build boost. Thanks

[FRMTL2_335i]

Originally Posted by Echoknight

This is great input, i was not too sure about the size and didn't want to have to take forever to build boost. Thanks

Yeah that turbo is near perfect for a 2.0L lol...

[Echoknight]

Originally Posted by FRMTL2_335i

Yeah that turbo is near perfect for a 2.0L lol...

This turbo will be a baseline. Once I complete the top mount, I could look into a better option.

[Echoknight]

Jig in the works for replicating this hybrid manifold.

[The Convert]

Originally Posted by Echoknight

Thinking of supporting it on either the manifold or a bracket off of the top and on to the frame rail (or whatever its called).

You can kiss your manifold goodbye in a hurry if you brace it to the frame rail...the engine only rocks back and forth ya know.

[SINGH_]

Originally Posted by Echoknight

Jig in the works for replicating this hybrid manifold.

[Echoknight]

Originally Posted by SINGH_

This is a pic of the jig. This pic is not the completed shot, but the jig is actually completed now. Taking orders soon.

[Echoknight]

Originally Posted by The Convert

You can kiss your manifold goodbye in a hurry if you brace it to the frame rail...the engine only rocks back and forth ya know.

Yeah, we used the manifold (weld a brace back to the one of the manifolds) to support the turbo instead. You are right it would have been a bad idea.

[Echoknight]

Here is a shot of the Waste-gate mounted. It will be open for now.

[The Convert]

That is a looooong tube to attach the wastegate to. Not really good placement. You need that thing to be as close to the turbo as possible and a good clean radius off the manifold. Also, your jig is missing all of the attachment points that ensure proper fitment. You should have locating tabs and flanges that ensure all bends and flanges end up in the exact same spot part to part.

[135Pats]

You're going to want to re-think that WG placement.

Edit: ^ he beat me to it lol.

[Echoknight]

Originally Posted by The Convert

That is a looooong tube to attach the wastegate to. Not really good placement. You need that thing to be as close to the turbo as possible and a good clean radius off the manifold. Also, your jig is missing all of the attachment points that ensure proper fitment. You should have locating tabs and flanges that ensure all bends and flanges end up in the exact same spot part to part.

The pic of the Jig is not the completed pic. Also, the placement of the wastegate is due to the rather large size 50mm. Since the waste gate placement is modular (not permanent), an alternative placement could come later. I could go smaller 38mm and place near the turbo flange, we will see.

[Echoknight]

Originally Posted by 135Pats

You're going to want to re-think that WG placement.

Edit: ^ he beat me to it lol.

Since it is modular, I can go smaller (38mm) and place closer to the turbo flange. we will have to see.

[135Pats]

Originally Posted by Echoknight

Since it is modular, I can go smaller (38mm) and place closer to the turbo flange. we will have to see.

I would strongly re-consider a single WG setup on a manifold with such long runners. Not hating at all to be clear, it's cool to see someone take this on as a DIY project. Best of luck.