That is exactly right: turbo to mf and thats what I will have welded. Were you distracted by the turbo to dp vband link?

I will get new mf gasget and nuts for mf and dp. Should I replace the studs in head and turbo too or should they be fine? There are all quite new (sept 08). Im leaning towards leaving them alone and shortening them where they are excessively long.

 

Removed the turbo and manifolde earlier this week and took them to the race shop to have the broken stud removed.

Discussed the various options and they strongly advised against welding them. Welding injects a lot of heat and would alter the material and it would probably crack right next to the weld...

They will source some incredibly strong studs and meanwhile I got the manifold and turbo back with the 'regular' studs so I can put together the car for street use at least...

So while I can drive again once I get it back together, I am still at a loss at the solution to this never ending issue...

During dis assembly I noticed the hex nuts on the oil return flange where not fully tight, so that probably caused some oil loss there I noticed a while back.

 

I'm going to safety wire bolts with large diameter safety wire. If that fails, one time, I'm going with a begi s4 with v-bands on everything and a tial wastegate. There's a reason racecars use v-bands.

 

Stuff back together:

It's good to have the car back together. But I am still debating the permanent solution for track abuse.

 

is that the same turbo I saw in a box at Zomer last friday?

 

Yes, most probably. They drilled out a broken stud in the manifold for me (and the other three because they were stuck) and replaced all four. Picked it up Friday at the end of the day and got it all back together last night.

 

BTW, you should have told me you where going there so I could come over.

 

New idea:

Brace turbo to block to unload manifold loading.

 

Product:
Turbo Support Brace - 034 MOTORSPORT

 

dirty dutch, lol.

 

Other brace sample:

 

The race shop suggested we source some Inconel (space material) studs.

Others also go that route:
Inconel studs - where to get em Syd? - PerformanceForums

 

There are several threads about this problem and I am a bit confused. if it is the studs stretching due to thermal expansion would you want to use a material for the stud that had a lower COE like titanium or if it is stretch of the stud caused by expansion of the flanges do you want something more resistant to stretch(is titanium more resistant to tension than steel?), just larger diameter studs, somehow add additional studs to the flanges?

 

must've missed you by a couple of hours then. No worries, I'll be back there soon to get my adjustable camgears mounted and have the car retuned. Hope to break 150 rwhp then.

I'll let you know when I go so we can meet up.

 

I'm looking for an affordable set of titanium nuts and studs right now.

 

I said I would:
https://www.miataturbo.net/forum/t37578/#post435998



This, or v-bands.

 

seems like it will be a bitch to put in now...

 

and if you break a stud?

 

Bitch? yes
Impossible? no

 

Stuff is still together after a 3-session track day and several street test runs. Anyone in for a batch of those studs and how much would you pay?