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08-20-2013, 02:40 PM
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#1
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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High heat non-metal bracket
Engineering ques:
My turbo actuator (metal body) bolts to my metal turbo via a metal bracket. And no shit, it gets HOT, and then fails... related? Has to be.
So here's my question, is there some material I could build this bracket out of, that will withstand the temperature of the turbo? 900+ degrees?? (I would think) In an effort to stop the heat conduction.
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I <3 forced induction.
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08-20-2013, 03:32 PM
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#2
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Senior Member
Join Date: Jan 2010
Posts: 1,255
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Quote:
Originally Posted by enkeivette
Engineering ques:
My turbo actuator (metal body) bolts to my metal turbo via a metal bracket. And no shit, it gets HOT, and then fails... related? Has to be.
So here's my question, is there some material I could build this bracket out of, that will withstand the temperature of the turbo? 900+ degrees?? (I would think) In an effort to stop the heat conduction.
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Carbon fiber would do the trick with high temp resins. they should be good for 2000+
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2006 CTS-V
1993 Trooper
1991 Impulse RS
1988 Trooper II SAS
1986 TrooperII (No Rear)
1988 Impulse (dead)
1983 K20
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08-20-2013, 03:34 PM
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#3
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pain's fun, hit me again
Join Date: Sep 2009
Posts: 6,264
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Titanium.
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Quote:
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Originally Posted by Bruce Lee
Forget about winning and losing; forget about pride and pain. Let your opponent graze your skin and you smash into his flesh; let him smash into your flesh and you fracture his bones; let him fracture your bones and you take his life. Do not be concerned with escaping safely — lay your life before him
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08-20-2013, 03:52 PM
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#4
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Carbotanium liked the Zonda Huyara. I'm sure they'd make a bracket for $20-$30k.
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08-20-2013, 05:58 PM
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#5
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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Does titanium not conduct heat like other metals?
I'll look into carbon fiber. Any idea who could make it for me?
__________________
I <3 forced induction.
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08-20-2013, 06:15 PM
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#6
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by enkeivette
Does titanium not conduct heat like other metals?
I'll look into carbon fiber. Any idea who could make it for me?
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Titanium conducts a lot less heat than a typical steel alloy does, but I wouldn't even know where to begin to get a bracket made in it. And I'm pretty sure it'd be crazy expensive. Carbotanium is only from Pagani AFIK.
Carbon fibre, perhaps unless hardened through autoclaving may not work so good because it tends to be very strong along its fibre axis, but brittle and prone to shattering at least when impacted from other directions. Maybe not a problem for a bracket, but I don't think it is typically used that way. Even on upper end cars, all that shit is machined billet aluminum AFIK. (Aluminum alloy conducts WAY MORE heat than steel alloy does.)
CF can be purchased and formed the same as you would for fiberglass. You build the object template you want to make, then the mold off the template, then "cast" the duplicate. There's actually a fair number of videos of Aaron doing this for the front bumper on the Snake.
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08-20-2013, 06:24 PM
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#7
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Senior Member
Join Date: Feb 2010
Posts: 325
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Is this bracket from the turbo mfgr? If not maybe there is a better location or the mfgr may have something.
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08-20-2013, 07:37 PM
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#8
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Internet Tough Guy
Join Date: Jun 2008
Posts: 1,545
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By actuator do you mean the waste-gate actuator? If so then what was the mode of failure (belows rupture, linkage failure)....... I promise you that someone has already solved this problem with a cheap part that you can buy instead of trying to determine what material would be best to fabricate a new part out of.
Regardless if you want to go that material route I would look at Inconel then Tungsten and finally ceramics. This is the dreamland option.
The real answer is to get an external waste-gate that is either electrically controlled or has a metal bellows.
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08-20-2013, 07:52 PM
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#9
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by BADDASSC6
By actuator do you mean the waste-gate actuator? If so then what was the mode of failure (belows rupture, linkage failure)....... I promise you that someone has already solved this problem with a cheap part that you can buy instead of trying to determine what material would be best to fabricate a new part out of.
Regardless if you want to go that material route I would look at Inconel then Tungsten and finally ceramics. This is the dreamland option.
The real answer is to get an external waste-gate that is either electrically controlled or has a metal bellows.
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Good advice.
I was thinking ceramics too for heat non-conductivity reasons. But I wouldn't know how to approach that and I didn't even know Inconel was generally available at all, thought that was just sort of a Navy thing. 
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08-20-2013, 08:10 PM
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#10
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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No one has solved this problem, in fact most people don't even realize that these can be rebuilt and they end up spending 4K on a new turbo from the dealer just to get this with it (Sprinter/ Jeep/ Toureg forums)
Nothing wrong with the bracket, and yes its the electronic waste gate actuator (It failed electronically, not mechanically). But it has a metal body, and bolts to the metal turbo with a metal bracket. Several hours after the car is off it is still too hot to touch. And that cannot be good for anything electronic.
My engineer friend suggested I insulate the bolts with silicone jackets and use fiberglass washers. To keep the bracket from conducting so much heat.
ImageUploadedByTapatalk1377054512.342780.jpg
ImageUploadedByTapatalk1377054557.417211.jpg
Bracket is left of the turbo, with 3 holes in it.
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I <3 forced induction.
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