EPIC nuts/studs loosening thread (reposting stupid stuff without reading = warning)
#522
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I just started getting the car back together today: the studs cannot be tightened down in the manifold because they simply protrude inside it. Mine have no shank and some say torquing down on the shank is not good either so Im kinda lost here... **** this ****, I am going v-bands.
#523
Travis: Wow, that's some small torque. Still, my **** stopped dieing when I went to bigger fasteners, less torque. I probably still have to much but whatever. :-)
Next time you're down in SD, I'll let you see my lathe. Just don't lean too close and get your breath on it.
Er, there's a LOT more room for the band to give? And any thermal expansion of the actual joint will merely try to unbend the V, but doesn't pull on the fasteners much.
No kidding. All these "theories" fall apart when you look at the GT2860 - there's no room to do ANYTHING but materials changes.
I had to grind the hell out of the turbo to get my 10 mm studs on there. I'm totally happy I did, mind you.
Heh, in the past I've fed the nut/stud combo in, and then delocked a second nut to torque it. But my studs poke though. I probably let the shank "kiss' the turbo when there is one.
Next time you're down in SD, I'll let you see my lathe. Just don't lean too close and get your breath on it.
Nuts / bolts in a traditional flanged application seem to be a problem in severe duty. Why aren't the v-band crowd having this issue? Surely just as much heat there, and a similar potential for materials to expand against the fastener.
No kidding. All these "theories" fall apart when you look at the GT2860 - there's no room to do ANYTHING but materials changes.
I had to grind the hell out of the turbo to get my 10 mm studs on there. I'm totally happy I did, mind you.
I just started getting the car back together today: the studs cannot be tightened down in the manifold because they simply protrude inside it. Mine have no shank and some say torquing down on the shank is not good either so Im kinda lost here... **** this ****, I am going v-bands.
#525
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I don't think anyone's used v-bands on a Miata yet. A couple cars in the build phase, a bunch more in the planning phase, but nobody has executed yet. I think I'm closest, so we'll know when I track it on the 15th.
#526
Edit: this wasn't the case when the MF was new. I just remember that is was quite hard to get the studs in the first time. The MF has suffered alot over the loosening issues over the past few months. So the MF is in a bad shape at this moment. I dont think I will fix this with this manifold.
#534
I'm only saying if you're having problems, consider it. I'm certainly NOT saying if it ain't broke, fix it. :-) I've got plenty of pics showing all the various breakages, retapping, etc etc I've done, and only one thing ever really lasted more than 4 months ever - and that was this, which has lasted over a year. I know it'll fix the problem for most people. I don't have any clue how it'll perform on the track (and don't recommend it for that) and I can't imagine in any way it'll outperform a system which is working perfectly. In no way will putting bigger studs make a turbo which stays on stay on "more", it won't do your laundry, blow you, or any such thing. But, feel free to disagree with it, and feel free not to try it. But if you ARE tired of your turbo falling off, I would suggest that you do.
#537
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Travis, I am putting together a customer car next week and I'd rather do it right the first time since he will be tracking it. I sent you a PM, but I want a set of hardware provided the price is semi-reasonable.