Turbo maifold bolts keep coming loose!
#21
Tour de Franzia
iTrader: (6)
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
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.
#22
Cpt. Slow
iTrader: (25)
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 14,204
Total Cats: 1,138
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.
#23
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.
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.
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.
#26
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...
#28
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...
#29
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")
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")
#30
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")
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")
#31
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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