Quote:
Originally Posted by JET02WRX
I'm sure if you look around someone may have done a comparo.. maybe not on a subaru....but i'm sure someone has.... The idea isn't that coating or wrapping gives you some great gain....its that it improves exhaust velocity which helps scavaging which can give a small increase. Also by keeping the heat in the pipe, it can help reduce heat soak, which will help to prevent instances of retarded timing.
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From what i have found it looks like ceramic coating maybe helpful in an NA car like a mustang where its running off the air under the hood. Idk i havent found any benifit to a turbo car yet. If you keep the heat in the pipe you just bake the turbo with heat? Our cars seem to have a nice place for the header to be (away from everything else). The air temps after the intercooler is what is important. So with most front mounts heat soak isent much of a problem. I could see the argument with a topmount maybe. When the cars moving the engine bay is alot cooler reguardless if parts are ceramic coated. I would save the $200 and get a C02 setup (thats my plan)