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Titanium vs Stainless Exhaust pipes

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Old 07-09-2002, 08:20 PM
  #1  
Steve Collins
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Default Titanium vs Stainless Exhaust pipes

I will be replacing a stainless steel pipe that has been damaged by wet starts. I am wondering what advantages a titanium pipe might have over an all stainless steel one?
Old 07-10-2002, 03:35 AM
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Helijet
 
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Default Titanium vs Stainless Exhaust pipes

Most manufacturers today will recommend the use of stainless steel ( .007 - .009 ). It is more resistant to wet starts and will not wrinkle as titanium does. One note, although titanium ( .005 ) is used because it is lighter it is not favored by engine manufacturers because it can easily burn through and has been known to support further combustion in cases of severe wet starts. JetTech, Extreme pipes, GoldenWest Models, Tamjets all produce very well made SS pipes for general models as as well as one offs ( custom ).
Old 07-10-2002, 04:29 AM
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EddieWeeks
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Default Titanium vs Stainless Exhaust pipes

I heard of a titanium pipe catching fire
and burning it self. I remember the
guy from texas said he had a bad wet
start, the thin tail pipe started burning
very bright, and within seconds the
back have of the plane was destroyed.

This was years ago and I have not hear
any thing like this again.

Is this possible ?

Eddie Weeks
Old 07-10-2002, 07:40 AM
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mec
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Default Titanium vs Stainless Exhaust pipes

titanium is lighter (titanium: 4.6gr/cm3, melting point 1670°C, inconel: 8.5gr/cm3, melting point 1390-1425°C), more expensive and known to burn through more easily.

i do not know if the manufacturers use a thicker wall on titanium pipes, so the advantage would be minimized.

mec
Old 07-10-2002, 11:40 AM
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Steve Collins
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Default Titanium vs Stainless Exhaust pipes

Well, that seems to settle it then. Looks like the replacement will be Stainless Steel. Thanks for the information.
Old 07-10-2002, 01:39 PM
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Pegasus
 
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Default Titanium vs Stainless Exhaust pipes

If you use thicker titanium .010 it is still lighter than SST and will not burn through like the thin Ti will.
Old 07-10-2002, 11:33 PM
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Helijet
 
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Default Titanium vs Stainless Exhaust pipes

Right....but try to find the stuff in small quantities?
Old 07-10-2002, 11:37 PM
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mr_matt
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Default Titanium vs Stainless Exhaust pipes

Originally posted by EddieWeeks
I heard of a titanium pipe catching fire
and burning it self. I remember the
guy from texas said he had a bad wet
start, the thin tail pipe started burning
very bright, and within seconds the
back have of the plane was destroyed.

This was years ago and I have not hear
any thing like this again.

Is this possible ?

Eddie Weeks
I think it is called a "thermite" reaction. It would have to be present with high oxygen and some sort of metallic oxide, and I think the titanium can actually combust. Not sure (or even vaguely aware) if that is what you saw.

Matt

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