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MSM manifold - turbo gasket

 
Old 01-09-2013, 04:25 PM
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Default MSM manifold - turbo gasket

I blew the manifold to turbo gasket twice this year while out on track. Using standard, not inconel hardware which I know is part of the problem. I want to fix it one more time, properly. Should I...

1 - Replace the gasket and add inconel
2 - Install inconel with no gasket
3 - Resurface turbo/manifold flat and add inconel with no gasket

I know a lot of you are running gasket-less. How flat do the flanges need to be? I'd like to stick a feeler gauge under a straight edge on the turbo and if flat enough avoid the giant pain in the *** that is pulling a MSM turbo. Is a HD Racing combination square straight () enough for this measurement?
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Old 01-09-2013, 05:18 PM
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option 3 = win

as for the flat part: its either flat or its not. if its not, it will leak. lol
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Old 01-09-2013, 05:20 PM
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Old 01-09-2013, 06:11 PM
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I'll have to find a piece of glass and see how straight my 3/8 extension is. What's the biggest feeler gauge I should allow between the straight edge and flange? Do I need another option?

4 - Don't be a bitch and pull that **** already
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Old 01-09-2013, 08:37 PM
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Oh, option 4 definitely.

No need for the extension straight option on a turbo/manifold, it's small enough you can get a straight edge like the one you listed to work. The extension is for a bigger surface, like your block.

I'm not sure on which feeler gauge would be good to use, you'd think it wouldn't have to be as flat as a block, but I really don't know how sensitive it is to being out of flat.
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Old 01-09-2013, 08:39 PM
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if you machine it right you shouldn't be able to get any feeler gauge anywhere. it will be FLAT
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Old 01-09-2013, 09:21 PM
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Flat is .000". If it's not .000", it's not flat.
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Originally Posted by codrus View Post
Basically I've come over to the camp of "If something is a reliability problem on the track, just ask Andrew and do what he says".
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Old 01-09-2013, 09:50 PM
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Thanks. Flat it is. I really wish you sold a M8x1.25 Inconel kit Savington. It's tight as-is and I'm not sure M10 nuts will fit.
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Old 01-09-2013, 10:54 PM
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Originally Posted by midpack View Post
Thanks. Flat it is. I really wish you sold a M8x1.25 Inconel kit Savington. It's tight as-is and I'm not sure M10 nuts will fit.
I thought TSE offered an M8 kit as well. If not, FM does offer an M8 setup:

Flyin' Miata : Turbochargers : Parts and upgrades : Inconel 718 turbo stud
Flyin' Miata : Turbochargers : Parts and upgrades : Stage 8 locking turbo hardware(8mm)

If you can't get the m10 to work, those might do the trick (albeit not as stout as the m10 solution).
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Old 01-09-2013, 11:51 PM
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Just out of interest are you using the OE turbo brace that ties the turbo to the block?

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Old 01-10-2013, 01:43 AM
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Yep
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Old 01-11-2013, 01:12 PM
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That is one piece I still have to find for my MSM turbo swap. Is there any reason not to run that brace? I got the FM 8mm Inconel studs a while back and they appear to fit perfectly on the MSM hardware lenthwhise.
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Old 01-11-2013, 02:10 PM
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Originally Posted by Savington View Post
Flat is .000". If it's not .000", it's not flat.
So you're suggesting he requires a ground surface on his manifold and turbo to create an adequate seal?

I'd bet $5 of monopoly money no one's ever done that on this forum.
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Old 01-11-2013, 02:22 PM
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My turbo to mani seal used a little wheel bearing grease as discussed in another thread from a few years back. It fill the minute gaps and turns to hard carbon as it warms up.
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Old 01-11-2013, 02:37 PM
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Originally Posted by curly View Post
So you're suggesting he requires a ground surface on his manifold and turbo to create an adequate seal?

I'd bet $5 of monopoly money no one's ever done that on this forum.
You owe me $5 or monopoly monies.
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Old 01-11-2013, 08:34 PM
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You've had your manifold and turbo professionally ground? Grats on the overkill.
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Old 01-12-2013, 11:53 PM
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On both of my turbo setups (old *** 300zx t25 & used HKS mani / Chinacharger & Flying miata cast mani) I was able to just bolt the turbo to manifold with no gaskets and had zero leaks. OP, have you tried just running it without a gasket?
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Old 01-13-2013, 12:03 AM
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Originally Posted by TorqueZombie View Post
You owe me $5 or monopoly monies.
make that 10
Originally Posted by curly View Post
You've had your manifold and turbo professionally ground? Grats on the overkill.
it was like 20 for the turbo and like 40 for the mani. really not that bad to have the piece of mind of overkill
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Old 01-13-2013, 12:40 AM
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Belt sanded is not .000 flat. .000 flat is ground like your crank shaft bearing surface. Except that's round obviously.
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Old 01-13-2013, 12:49 AM
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Machined=/=belt sanded
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