Re: trying to make a turbo manifold....??
 

will hotcheeks defend his stirling intraweb rep ??? ;D

Re: trying to make a turbo manifold....??
 

If hotrex did a decent job of welding the manifold, it should last quite a while. We are still talking about very thick material which helps prevent quite a bit of problems as far as cracking is concerned. That brace is a piece of ---- though. It probably going to do more harm than good. Just weld some sort of bracket that supports the turbo in place and has some ability to move around a bit. That way when the manifold moves and shifts, twists and turns, the load will be minimalized on the weld joints. Right now, the brace is poorly attempting to keep the manifold put. Let the manifold shift and shake. You can't really prevent that do to the engine is going to shift and shake, just make it so you minimalize the loads

Re: trying to make a turbo manifold....??
 

this was a mani i asked for feedback on in the h-t fab forum. i decided against this design, and sold it to one of the local kids. you wont see another one like this from me. he wanted the piece of steel there, so i pt it there for him.

and lastly, i dont forsee this manifold cracking. the welds are butter.
heres a pic or 2 of it with the dp. and a turbo on it. it fits really nice in his eg hatch.

our new design is much better and will include a nice brace with it. ala renaulter styles. hate on brothas.
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Re: trying to make a turbo manifold....??
 

for one reason or another the design that you asked for feedback on and the new one look quite similar? ???

Re: trying to make a turbo manifold....??
 

what are you talking about, i havent even built the new design yet. this is the same manifold i posted on h-t

Re: trying to make a turbo manifold....??
 

I must have read it wrong or something. I assume the car pictured is the local kid?

Re: trying to make a turbo manifold....??
 

yeah, this is the manifold that i posted on h-t. we wanted feedbakc, after some deliberation we decided we wanted to use a longer collector and work on runner length. but since this mani fit pretty well, and was already fabbed, i prepped and welded it fora local kid. you wont see this manifold ever built again.

i must say in person on the car it looks sexy as hell with the 3 inch dp and ssautopoopie turbo.

Re: trying to make a turbo manifold....??
 

i agree it is pretty sexy :y

Re: trying to make a turbo manifold....??
 

looks good and i doubt it would break with or without the brace

Re: trying to make a turbo manifold....??
 

I love all this talk about 'stresses' and what braces will work and which ones will not.

A funny thing about 'engineering' something is customer perception. If it looks tough, it probably is tough.

I was not real sure about the comment about gravity pulling down and not forward... what that was supposed to mean.

If you weight the turbo, and measure the distance from the block, that is a 'moment arm' and it will produce a bending moment about the flange. Along with this, there will be a direct shear force on the welds of the flange due only to the weight of the turbo. Welds are also weakest in shear.

If you would really like calculations to verify whether it may break or what (if any) factor of safety gaurding against failure, I will get out the ti-89 and some graph paper and go to town.