Non E28, but wow, what a manifold...

[russc]

Now thats a turbo manifold...



Its for an E36, so I guess M50 or 51? From the Bimmer Forums. That is nice!

Russc

[turbodan]

The flange pattern looks like that of an S54. I believe the S50/2 had a square four bolt design.

[m.olennick]

it is for the s54, horsepower freaks turbo manifold.

[Shawn D.]

It's pretty and nicely fabricated, but the square cross-section with sharp internal corners will cause unwanted interference drag.

[Boru]

It's pretty and nicely fabricated, but the square cross-section with sharp internal corners will cause unwanted interference drag.

Ditto. It looks pretty but it's just some machined plates welded together into a box. You would do better to press, form or hand hammer sections to obtain rounded forms that reduce turbulence.
If you really want to go crazy you could machine the entire thing from a solid bar of continuously cast ductile iron. Now that would leave a nice pile of chips. 8)

[T_C_D]

If you really want to go crazy you could machine the entire thing from a solid bar of continuously cast ductile iron. Now that would leave a nice pile of chips. 8)

There are couple of pieces of ductile iron in your shop that need some material removed from them.

[Good & Tight]

It's pretty and nicely fabricated, but the square cross-section with sharp internal corners will cause unwanted interference drag.

Ditto. It looks pretty but it's just some machined plates welded together into a box. You would do better to press, form or hand hammer sections to obtain rounded forms that reduce turbulence.
If you really want to go crazy you could machine the entire thing from a solid bar of continuously cast ductile iron. Now that would leave a nice pile of chips. 8)

There are no sharp corners inside, it is cnc machined inside and with very smooth runners.

[Boru]

It's pretty and nicely fabricated, but the square cross-section with sharp internal corners will cause unwanted interference drag.

Ditto. It looks pretty but it's just some machined plates welded together into a box. You would do better to press, form or hand hammer sections to obtain rounded forms that reduce turbulence.
If you really want to go crazy you could machine the entire thing from a solid bar of continuously cast ductile iron. Now that would leave a nice pile of chips. 8)

There are no sharp corners inside, it is cnc machined inside and with very smooth runners.

Afterwards, I thought that was probably the case as so much machining was already done.

I guess I just get a kick out of posts like this... a lot of people are drawn to the shine like fish to a lure. It's happens frequently with big bright intercoolers even though they have terrible tank/flow design.

[Shawn D.]

It's pretty and nicely fabricated, but the square cross-section with sharp internal corners will cause unwanted interference drag.

There are no sharp corners inside, it is cnc machined inside and with very smooth runners.

Did you understand what I meant when I said "internal corners"? I'm not talking about anything poking out -- I'm talking about the corner formed when two flat plates come together, as in the internal corners and vees of a box, which this is. Internal corners cause interference drag. The interference drag can be mitigated by fillets, though. Show me internal shots and then I'll believe you that the intersections are filleted.

[Jays535is]

It's pretty and nicely fabricated, but the square cross-section with sharp internal corners will cause unwanted interference drag.

There are no sharp corners inside, it is cnc machined inside and with very smooth runners.

Did you understand what I meant when I said "internal corners"? I'm not talking about anything poking out -- I'm talking about the corner formed when two flat plates come together, as in the internal corners and vees of a box, which this is. Internal corners cause interference drag. The interference drag can be mitigated by fillets, though. Show me internal shots and then I'll believe you that the intersections are filleted.

Will this work for you? Not bad for a box welded together.
http://www.horsepowerfreaks.com/hpf750_ ... nifold.asp

[Shawn D.]

Will this work for you?
http://www.horsepowerfreaks.com/hpf750_ ... nifold.asp

Yes, indeed! Very nice!

[Boru]

It does have nicely designed runners. I wonder how well the welds will hold up over time as those sections are pretty large with only a perimeter weld... open seams internally along the length of the manifold.

[landspeed]

I'm really kinda curious how it's secured because the gap between the manifold and the flange is really small. I don't see how you could mount that with the head on, or at least the bottom bolts.

[M. Holtmeier]

It's installed in seperate sections