Turbo Bolts, who's interested.

[h100vw]

Jimmy is right now I think about it. The top of the flange where the turbo bolts on is flat.

Edit, I am thinking of the ATP manifold in my garage.... Sorry if I confused the issue.

Gavin

[Jmac]

Hoyhoy.
Jimmy, doesn't the Polo manifold have a couple of raised fins between the stud locations that could also act as a stop. Besides the development of these depend on a show of positive hands before it goes any further. This mob in Drummoyne (Sydney) will need a manifold to be able to work it out.

Good old Drummoyne, been to some highland gatherings there was a top spot, oops off topic my bad. I have had a look at a manifold today and yeah Eddy the ribs sit in between the bolts so you could be onto something there now, only thing i see is the favorite bugger ( one closest to the head) sits a bit more subflush, so might be a bit trickier. I have a manifold here, but i reckon they need to have it coupled to the turbolader to see if the stud aplication will work. Like i say its a top idea and well worth persuing imo. To further that ive just done an ATP manifold on a Pog and the inner bolt had to be sat in the manifold before i buttoned it up otherwise i wouldnt have been able to fit the bolt when the manifold was on. I reckon they would have to try the stud thing with a car there and not just the manifold i reckon, its a tricky area at the back there and especially the one closest to the head im sure you will agree. Be great if they could have a car just incase it all works well with the manifold off the car and then falls short on the car, hope that makes sense, im not trying to be negative only know how much drama you can have with it all in place. i know i exhausted my profanity vocab doing the last one.
Cheers
Jmac

[Guy_H]

Just looked at a Polo Manifold - the ribs would stop the tabs from rotating without a problem. - getting the turbo into place might be a little tricky!

[Timbo]

Looks like a possible, and yes, IME, those ridges might give the lock some purchase. I'd also suggest adding a support from the turbo back to the block. There are some pre-drilled threaded holes to enable this, and Paul Muller tried this with MACCAA's car. You need combinations rather than a single fix!

i know i exhausted my profanity vocab doing the last one.

Those bolts took me back to the days of changing a fan belt on a Cooper S. Very quickly, you invent new profanities and combinations of existing. Certainly not a time to have women or children present

[Eddy]

Hoyhoy.

OK, my lastest theory up for comments.
The standard bolts are 50mm long (shank) with 15mm going into the turbo & the other 35mm being the depth of the manifold.
The proposed studs to be 60mm plus ??? long to allow double thin nuts to tighten the studs.
Now the working space available could put a damper on this, but where there is a will there is a way.
The stud itself to be 15mm of 1.5 pitch thread going into the turbo & then shanked for say 30mm, with the rest to be of fine thread which Atomic normaly use.
The locking tabs can be postioned in 12 different locations in one turn, you tighten the nuts & fit on the locking tab & then the C-clip, you may have to file the tab to get it fit up hard against the fins.
I know & have fitted 62mm BOLTS without removing the turbo or manifold on a standard set up.
Open for discussion, because I've more than likey missed something.

[Eddy]

Looks like a possible, and yes, IME, those ridges might give the lock some purchase. I'd also suggest adding a support from the turbo back to the block. There are some pre-drilled threaded holes to enable this, and Paul Muller tried this with MACCAA's car. You need combinations rather than a single fix!



Those bolts took me back to the days of changing a fan belt on a Cooper S. Very quickly, you invent new profanities and combinations of existing. Certainly not a time to have women or children present

Hoyhoy.
I also agree with bracing from the downpipe to engine block drilled threaded holes.

Me changed my idea on this, I now agree with what Tim is trying to tell us.