Aircraft engines are not the same as high performance racing engines. At the RPM we are running friction in the pipes and tuned length exhausts are going to do very little if anything. In fact we probably want a bit of back pressure in the exhaust to aid with fuel economy. As for wrapping the exhaust, if it is mild steel it will rust much quicker, and I agree with your IA that stainless would probably crack. The wrapping of fibreglass around your exhaust is also a fire hazard.
Regards Barry Kruyssen k...@bigpond.com -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf Of ace nunye Sent: Wednesday, 21 January 2009 11:22 AM To: kr...@mylist.net Subject: RE: KR> N1213W back in the air > Date: Wed, 21 Jan 2009 17:00:29 -0600> From: fles...@verizon.net> Subject: Re: KR> N1213W back in the air> To: kr...@mylist.net> OK, I have a question, I asked an IA friend and I'm not sure I agree with his answer so I'll ask the group. My neighbor is a round track guy and he has his headers wrapped with fiberglass insulating tape, he says this will keep exhaust gas hotter and therefore less dense. Exhaust gas that is less dense will exit without as much friction in the exhaust system, hence less back pressure. Ok, the IA says by keeping the heat in the exhaust system the S.S. steel exhaust pipes will be more prone to cracks because of excess heat. If one had a mild steel exhaust system then it wouldnt be as much of an issue, but if on the other hand one had stainless??? The question is, " To wrap or not to wrap THAT is the question. Are there other issues with having higher pipe temps, would this cause higher CHT or even higher exh valve temps? Comments?
