Its more than just a crack. It's actually totally detached itself! Like this "artists impression"

Ouch, all I can say is good effort doing that :( Must have been the meth runs you were doing!

Any chance you can bung up the video/photo's in the other thread?

must be too much pressure just blew it to pieces

if i had spent a small fortune i would not be a happy bunny!

Well, I have a gauge monitoring EMPs as well, and I get nothing severe - spikes of 3 bar, then matching boost pressure of 2.3 bar ish. I think something has just shaken itself to bits. I was told the manifold would support the turbo fine on its own, but this proves otherwise. Going to be using some kind of rubber/bush mounted supports on any next build....

Ouch! The joys of modified cars...

Wouldn't be pressure, when you talk 3bar, that's nothing in terms of stress......0.3MPa, as opposed to a few hundred MPa steel can take....have you got a picture of the cross section of the crack? It's it's different shades, it'd show Micro crack growth, and ultimate failure.

Personally, I reckon its cyclic fatigue loading.....turbos aren't light.

No pics yet, but due to where it is, will be combination of turbo weight & vibes, despite being told the manifold would hold the turbo on its own....

Oh dear Jason, it's one thing after another. I fear a re-design of the manifold is required. Good luck.

Bad news, Sorry to hear this mate

Personally, I reckon its cyclic fatigue loading.....turbos aren't light.

yes i'd agree with this, normally a stress fracture will start immediately adjacent to the heat affected area of the welds on tubular and plate manifolds.... the best remedy for this is to have a support strap for the turbo to support the weight

:(

Sorry to see this

Yes, if the manifold is able to be rewelded up in situ, I will definitely be wanting a support system now. Always good to be told by the manifold designer that one isn't needed....

the other thing that can damage tubular manifolds is being suddenly quenched in ice cold water, exactly why i cringed when we went through that ford on the jarassic park meet last, i've removed my undershield on the ute to help airflow and the manifold runs down the front of the engine and under the sump, got a nice hairline crack in it which i've welded up since

Well, water shouldn't have been an issue for me. Just heat & vibes I suspect. Fingers crossed a re-weld will be sufficient, as I cannot really afford to lash out hundreds on another custom manifold....

the other thing that can damage tubular manifolds is being suddenly quenched in ice cold water, exactly why i cringed when we went through that ford on the jarassic park meet last, i've removed my undershield on the ute to help airflow and the manifold runs down the front of the engine and under the sump, got a nice hairline crack in it which i've welded up since

Water turns into steam in the cylinder anyway, it's not as if it's getting dipped in water.

Water turns into steam in the cylinder anyway, it's not as if it's getting dipped in water.

The poster was refering to cold water being thrown up onto a hot manifold I believe. Like if you go through a ford too quickly.

Well, I have a gauge monitoring EMPs as well, and I get nothing severe - spikes of 3 bar, then matching boost pressure of 2.3 bar ish. I think something has just shaken itself to bits. I was told the manifold would support the turbo fine on its own, but this proves otherwise. Going to be using some kind of rubber/bush mounted supports on any next build....

This used to happen on Ur-Quattros apparently. One bloke made up a cradle to support the turbo. Saw it in 'Audi Driver' magazine years ago- even back then the OE manifold was £700.

Sorry to hear your news Jason, hope it gets sorted pretty soonish