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YOUR RESEARCHTITANIUM EXHAUST WRAP !
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Use heat jackets is
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Suggestion
The idea behind wrapping manifolds and using heat jackets is to keep gas speed up and heat soak down.
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Suggestion
To be honest I would buy new standard heat shield and use those.
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I've done similar on my old Evo VIII (410 bhp from a 2.0 Litre at 1.8 bar).
Pros - you can touch the manifolds even after being on track without burning yourself.
Cons - tends to get dirty and grubby over time.
As for performance, I don't think they make much difference. I certainly didn't notice anything significant on my old Evo.
The mainifolds on the 996T are pretty exposed to airflow, so I'm not sure how much heatsoak you get into the engine bay (and ultimately your intake charge) to actually impact on performance anyway.
You will definitely heat up your turbos more though, which may cause earlier failure, but I don't think that's significant either.
Overall, it's easy and cheap enough to do, but I probably won't do it to my 996T.
However, the turbo hotsides get extremely hot and are very near the compressor side and intercoolers. I definitely intend to put a turbo blanket on the hotsides of mine.
Be careful with a turbo blanket. I cooked two turbos before junking it. 2.0ltr Cosworth yb with 640bhp and 540lbft did not like it one bit. Cost 3k in turbos. Far far FAR too much heat built up with that power and the bearing melted into the turbo shaft. Not saying it would happen on something less stressed but worth a thought. The idea behind wrapping manifolds and using heat jackets is to keep gas speed up and heat soak down. Anyway just my two penneth.
I'd second the con, the manifolds on my turbo had been wrapped when fitted in 2014, took them off due to one blowing and it looked like they had been sat at the bottom of an ocean for 20 years when the wrap came off!!
Only really needed when you are very close to other components/bodywork to stop the heat affecting them, I don't think it has a gain for the actual exhaust. Its to stop damaging other components basically.
It's used to keep exhaust temps/gas temps up increasing scavenging thus increasing gas flow and power. Protecting other components is also a bonus but not the reason it's usually used in racing.
Thanks, the reason I'm toying with the idea of blankets is that the turbos have heat shield on them out of the factory, but mine are missing.
A blanket will do a better job of keeping the heat in the turbos, but you're right, it might do too good a job! :frustrated:
While I was replacing my turbos I fitted new heat shields as mine looked like they had come out of the titanic. They were £50 each side brand new from Porsche
Good response lads :thumb:
My concerns are heat dissipation ! YOUNGSYR made a good point of the turbo's getting to hot.
That's my main concern by wrapping the mainfold's will the heat that usually escapes through the manifold will it be harnessed down to the turbo's ???
I have also heard that they do rot the exhaust prematurely ?
But I have also heard that's down to improperly installing them not using the silicone protective coating ?
In a normal application your turbo will not get too hot. Only stupid boost levels with a poorly flowing exhaust manifold will cause the turbo to get too hot. Depending on the state of tune though it's something to be aware of. To be honest I would buy new standard heat shield and use those. If it's good enough for Porsche.......
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