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ke382TG Forums Junkie Registered: May 2002	Re: exhaust manifold pressures Thu, 25 August 2005 06:40 I can understand YelloRolla statment from Corky Bells book which states that by measuring the exhaust manifold pressure you could identify manifold design inefficiencies. But in what street applications (even most race applications) would the exhaust manifold pressure reach a point where it would/could cause structural damage or detrimental failure? So I guess my question is: measuring pressure for efficiency purposes would be useful, but how necessary is it to try and measure exhaust manifold pressure when inlet pressures are not going to be exceedingly high i.e <30psi ???? Quote: So if it runs say 15 PSI max exhaust pressure is say 30 so if we add a factor of safety of say 10 PSI and pressure test it to say 45 PSI that should cover it i would think I would have thought even the flimsiest (technical term) thin walled manifolds I have seen would cope with 3 bar of pressure, even at higher temps????? A plastic 375ml coke bottle is capable of holding approximately 300psi before catastrophic failure, so I assume a well constructed tig welded steam pipe manifold would cope easily with 3 bar of pressure until the metal reached a temperature point where it became plastic????? I am rambling now, someone with knowledge (a metalurgist) enlighten us [Report message to a moderator]

	Subject	Poster	Date
	exhaust manifold pressures	GUN METAL 87 SC	Fri, 19 August 2005 11:43
	Re: exhaust manifold pressures	berad	Sat, 20 August 2005 00:01
	Re: exhaust manifold pressures	GUN METAL 87 SC	Wed, 24 August 2005 10:19
	Re: exhaust manifold pressures	YelloRolla	Wed, 24 August 2005 10:31
	Re: exhaust manifold pressures	GUN METAL 87 SC	Wed, 24 August 2005 10:35
	Re: exhaust manifold pressures	oldcorollas	Wed, 24 August 2005 11:25
	Re: exhaust manifold pressures	oldcorollas	Wed, 24 August 2005 11:45
	Re: exhaust manifold pressures	YelloRolla	Wed, 24 August 2005 22:06
	Re: exhaust manifold pressures	YelloRolla	Wed, 24 August 2005 22:07
	Re: exhaust manifold pressures	oldcorollas	Thu, 25 August 2005 06:09
	Re: exhaust manifold pressures	YelloRolla	Thu, 25 August 2005 06:16
	Re: exhaust manifold pressures	ke382TG	Thu, 25 August 2005 06:40
	Re: exhaust manifold pressures	YelloRolla	Thu, 25 August 2005 06:45
	Re: exhaust manifold pressures	oldcorollas	Thu, 25 August 2005 07:32
	Re: exhaust manifold pressures	oldcorollas	Thu, 25 August 2005 07:36
	Re: exhaust manifold pressures	ke382TG	Thu, 25 August 2005 06:55
	Re: exhaust manifold pressures	YelloRolla	Thu, 25 August 2005 07:00

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