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Originally Posted by dkveuro
(Post 1287348)
There are for and against turbo wrapping.
Yes: To reduce heat up time and keep exhaust energy high. Reduce turbo 'lag'. No: Will cause the turbo to have shorter life...more heat to oil...more heat to coolant....increased fastener failure due to thermal overloading.......no measurable increase in power...total waste of time. For a street car you just need a heat shield to stop radiating heat . Wrapping has not proved to be effective unless your running Le Mans. WARNING: Wrap around the turbo/headers/down pipe will be a fire hazard if the wrap becomes soaked in oil. It WILL catch fire...ask me how I know. only today i have read this...i throw away the wrap on the turbo.. thanks for the advice!! |
Originally Posted by Claudio157
(Post 1295062)
only today i have read this...i throw away the wrap on the turbo..
thanks for the advice!! The Asian vehicle manufactures clad the exhaust pipes and build a radiant shield around the turbo. If fitted tight enough this is best for turbo and will not catch fire. The down pipes are usually clad with steel or aluminum cladding crimped around the pipes. I noticed early Honda's had an asbestos type of packing inside the cladding. Have seen this insulation material burst into flames too on dyno pulls. It only needs a little oil to initiate a fire when the pipe it is next to reaches oil's flash point. If your able to fabricate a shield this will help especially if the shield hides the turbo from direct cold ram air. Don't use stainless steel as this is too hard to fabricate and cut. Make sure the shield has good support as vibration will make shield mount areas crack. One last thing...When a metal is heated to yellow heat or beyond..around 1200F to 1500F... and is wrapped, this cooks the metal and it erodes from the inside . For more information check this link: Century Performance Center, Inc. :: Exhaust Header Heat Wraps - DO NOT USE ... |
Originally Posted by dkveuro
(Post 1295063)
Glad to see another fire hazard averted. Fire under the hood at speed is a frightening experience and since I experienced it.... ( Wrapped manifolds on a 1985 Porsche 928, in case anyone was wondering. ) .... I now carry a Fire Extinguisher in my truck.
The Asian vehicle manufactures clad the exhaust pipes and build a radiant shield around the turbo. If fitted tight enough this is best for turbo and will not catch fire. The down pipes are usually clad with steel or aluminum cladding crimped around the pipes. I noticed early Honda's had an asbestos type of packing inside the cladding. Have seen this insulation material burst into flames too on dyno pulls. It only needs a little oil to initiate a fire when the pipe it is next to reaches oil's flash point. If your able to fabricate a shield this will help especially if the shield hides the turbo from direct cold ram air. Don't use stainless steel as this is too hard to fabricate and cut. Make sure the shield has good support as vibration will make shield mount areas crack. One last thing...When a metal is heated to yellow heat or beyond..around 1200F to 1500F... and is wrapped, this cooks the metal and it erodes from the inside . For more information check this link: Century Performance Center, Inc. :: Exhaust Header Heat Wraps - DO NOT USE ... in a few months i will fabricate a shield in aluminum, for now is not necessary because it's cold here :) But thanks to your comments i was able to save my turbo from certain death.. :D |
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that link is awesome... according to their little graphs, if I use ceramic coating, my header will actually gain material!!! Awesome! It's like a little custom stainless steel generator. I'll be RICH!!!
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And here I thought steel was mined, not grown. Learn something new every day. Can you get government subsidies for a steel farm? Cuz I will build a whole fleet of race cars with ceramic coated headers if that's the case.
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