Has anybody wrapped their exhaust manifold?
I am thinking of buying some of that heat wrap available at Summit Racing for headers and wrapping the exhaust manifold on the 300SD. I am trying to get the under hood temps down as much as possible plus I figured that hotter exhaust would give more energy to the turbo. Has anybody done this in the past?
I do not want to pay a couple bucks for the wrap and blow a perfectly good turbocharger... Thanks! |
I havent ever done it on a turbo car but I do have header wrap on my Saturn with a header so it wont melt the cooling fan, works great keeps the thing nice an cool you can touch the stuff and its not even warm so its does quite a good job
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I use heat wrap from NAPA at work to keep the equipment from starting fires (paper mill). Non-metallic, dropped engine temps on most equipment and lasts a long time.
It reduced the heat from the exhaust being pushed through the radiator. Most equipment here pushes the air through the radiator and out the back. I double layered the Benz from the manifold back to the muffler to reduce floor temps in the car. Worked good. I think it would work great on a turbocharged engine. |
i dont think i would wrap it around the turbo itself... you want to keep EGT's down... not up..
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I also wound not wrap the turbo, but wrapping the manifold shouldn't hurt anything. It may reduce the under-hood temperature a bit, but I don't believe it will help performance measurably. Let us know how it works.
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I was never thinking of wrapping the turbo, just the manifold around the cylinder head exhaust port and around the "log"
Thanks for all the replies! |
I have seen it done on small shrimp boats [bay boats 26 to 35 ft]
they work all nite every nite with 6-71 4-71 and cats ect they also wrap the turbos with a thick blanket looking bit of fiber glass with al foil out side so far [years] no problems and a little extra free power and a cooler runing boat too |
They make header wrap and turbo blanket kits. Wrapping the manifold and also the turbine section of the turbo will keep heat in and actually increase exhaust gas velocity. This will decrease turbo lag, reduce turbo compressor section heat soaking, reduce underhood temps, etc. This wrapping is very common on boats and trucks. RT
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Don't wrap the manifold or the turbo. Wrapping it will keep the heat in and bake the strength out of the iron. That can lead to cracking and warping.
Wrap the exhaust after the turbo down to the flex section. |
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http://www.stahlheaders.com/faq.htm#wrap Quote:
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Fair enough, I retract the BS statement. I do find it interesting that the info you posted is from wrap manufacturers, which is basically CYA and a header manufacturer. I am not surprised that the thin pipes of headers can be damaged. At the same time I would also like someone to explain why I have seen the manifolds, turbos, etc. all wrapped on various pieces of equipment and every boat I have seen? How come there are no problems for them?
Besides the disclaimers on products, etc. does anyone have any metallurgical pros and cons? There are enough engineers on this board, someone will know.... RT |
every fishing boat in the world i have ever seen has a complete wrap from turbo out thru the deck on a dry exhaust. This has nothing to do with power gains strictly a heat issue not to cause fires. And yes all our turbos are iron too only one I have ever seen cracked was when bearing let go in the turbo itself Every engine manufacturer i know sells heat blankets especially fitted for the turbo
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