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Originally Posted by golftdibrad
(Post 747463)
Inconel just isnt in the budget right now, and I dont really track this car, just autox and mountain carving once a year. I dont think I'm serious enough for inco yet.
-Brad |
I must have a good manifold design, or magic bolts. 8mm, ACE hardware $.60 SS allen bolts, they all stay fairly tight. I replace them every couple track days, but that's more preventative than anything. My turbo sits on top of the manifold though, horrible for heat shielding, down pipe flow, down pipe routing, and looks, but apparently easy on bolts.
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Originally Posted by hustler
(Post 747522)
My turbo-manifold 10mm bolts broke when I was 4-hours from home. They broke when I wasn't at the track, just cruising. I know it's not cheap, but it's probably the same price as a tow home.
Originally Posted by curly
(Post 747528)
I must have a good manifold design, or magic bolts. 8mm, ACE hardware $.60 SS allen bolts, they all stay fairly tight. I replace them every couple track days, but that's more preventative than anything. My turbo sits on top of the manifold though, horrible for heat shielding, down pipe flow, down pipe routing, and looks, but apparently easy on bolts.
Originally Posted by JasonC SBB
(Post 747513)
I think the Stainless Steel 308(??) type studs are a sol'n that's halfway effective between ordinary studs and the $$ Inconel studs.
They're the same material used on boilers - there's an ASME standard alloy for them, and yes they have better high temp creep and CTE characteristics than the ordinary studs. |
1 Attachment(s)
some data, plan steel is not on here, but the curve is likly similar to the high alloy just shifted down in the y-axis.
https://www.miataturbo.net/attachmen...1&d=1310409885 |
I believe "we" tried that metal at the advice of TiAL on the CHRA and it did not work.
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I believe one of the euro track guys had good luck by having the nuts welded to the manifold. I believe he (Doppelganger?) made some pretty informative posts on what he did and how well it worked. I'm too lazy to search for you but the info should be out there. Seems cheaper than inconel parts...
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I bought 8-18 stainless with those nordlock things from mcmaster. I'll re-torque when hot and see how it goes.
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Originally Posted by Efini~FC3S
(Post 747767)
I believe one of the euro track guys had good luck by having the nuts welded to the manifold. I believe he (Doppelganger?) made some pretty informative posts on what he did and how well it worked. I'm too lazy to search for you but the info should be out there. Seems cheaper than inconel parts...
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316 SS is better than 304 SS, but looks like 304 is still better than ordinary stud material.
Here's my posts with info: https://www.miataturbo.net/showpost....&postcount=691 https://www.miataturbo.net/showpost....&postcount=729 https://www.miataturbo.net/showpost....&postcount=692 (both 304 and 316 are used for hi temp fasteners, aka "B8" and "B8M") |
Originally Posted by JasonC SBB
(Post 747840)
316 SS is better than 304 SS, but looks like 304 is still better than ordinary stud material.
Here's my posts with info: https://www.miataturbo.net/showpost....&postcount=691 https://www.miataturbo.net/showpost....&postcount=729 https://www.miataturbo.net/showpost....&postcount=692 (both 304 and 316 are used for hi temp fasteners, aka "B8" and "B8M") |
Originally Posted by Efini~FC3S
(Post 747767)
I believe one of the euro track guys had good luck by having the nuts welded to the manifold. I believe he (Doppelganger?) made some pretty informative posts on what he did and how well it worked. I'm too lazy to search for you but the info should be out there. Seems cheaper than inconel parts...
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