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foxtail Regular Location: Brisbane Registered: January 2005	Re: Inlet manifold designs Thu, 06 January 2005 01:47 With the 50-50% rule, some manufacturers seem to use that (like the mirage - what plenum!) I beleive that plenum size depends on the runner length and diameter, also depends on whether your after torque or power. I small plenum will increase torque as it increases the velocity of the air, a large plenum will offer no restriction so good for top end power. I guess the only real answer is experimentation. Make a large plenum, then 'tune' it by filling the plenum slowly with something to reduce its internal size. Ultimately you want variable runners like the mazda quad rotor sliding trumpets. Or even what most manufacturers do is to have a secondary chamber in the middle of the runners and a ECU controlled butterfly to direct air to or around it. [Report message to a moderator]

	Subject	Poster	Date
	Inlet manifold designs	Cool1	Wed, 03 March 2004 12:42
	Re: Inlet manifold designs	V8_MA61	Wed, 03 March 2004 13:05
	Re: Inlet manifold designs	Jayem	Wed, 03 March 2004 15:36
	Re: Inlet manifold designs	V8_MA61	Thu, 04 March 2004 04:02
	Re: Inlet manifold designs	Cool1	Wed, 03 March 2004 21:16
	Re: Inlet manifold designs	TurboRA28	Wed, 03 March 2004 23:28
	Re: Inlet manifold designs	gianttomato	Wed, 03 March 2004 23:40
	Re: Inlet manifold designs	Cool1	Thu, 04 March 2004 00:28
	Re: Inlet manifold designs	bbaacchhyy	Thu, 04 March 2004 00:33
	Re: Inlet manifold designs	Cool1	Fri, 05 March 2004 00:07
	Re: Inlet manifold designs	bbaacchhyy	Fri, 05 March 2004 04:20
	Re: Inlet manifold designs	gold28	Thu, 04 March 2004 00:36
	Re: Inlet manifold designs	Cool1	Thu, 04 March 2004 00:54
	Re: Inlet manifold designs	justcallmefrank	Thu, 04 March 2004 04:44
	Re: Inlet manifold designs	V8_MA61	Thu, 04 March 2004 04:48
	Re: Inlet manifold designs	gianttomato	Thu, 04 March 2004 04:50
	Re: Inlet manifold designs	justcallmefrank	Thu, 04 March 2004 05:19
	Re: Inlet manifold designs	V8_MA61	Thu, 04 March 2004 05:01
	Re: Inlet manifold designs	Norbie	Thu, 04 March 2004 06:28
	Re: Inlet manifold designs	ed_ma61	Thu, 04 March 2004 08:48
	Re: Inlet manifold designs	ed_ma61	Thu, 04 March 2004 09:03
	Re: Inlet manifold designs	Cool1	Thu, 04 March 2004 12:42
	Re: Inlet manifold designs	ed_ma61	Fri, 05 March 2004 00:21
	Re: Inlet manifold designs	gianttomato	Fri, 05 March 2004 01:19
	Re: Inlet manifold designs	Cool1	Fri, 05 March 2004 00:28
	Re: Inlet manifold designs	ed_ma61	Fri, 05 March 2004 01:26
	Re: Inlet manifold designs	TurboRA28	Fri, 05 March 2004 01:30
	Re: Inlet manifold designs	justcallmefrank	Fri, 05 March 2004 01:31
	Re: Inlet manifold designs	BlackSupra	Fri, 05 March 2004 01:36
	Re: Inlet manifold designs	ed_ma61	Fri, 05 March 2004 01:39
	Re: Inlet manifold designs	Cool1	Fri, 05 March 2004 01:59
	Re: Inlet manifold designs	gold28	Fri, 05 March 2004 02:12
	Re: Inlet manifold designs	Cool1	Fri, 05 March 2004 02:23
	Re: Inlet manifold designs	BlackSupra	Fri, 05 March 2004 03:58
	Re: Inlet manifold designs	Cool1	Fri, 05 March 2004 04:13
	Re: Inlet manifold designs	Cool1	Fri, 05 March 2004 04:18
	Re: Inlet manifold designs	Cool1	Fri, 05 March 2004 04:38
	Re: Inlet manifold designs	BlackSupra	Fri, 05 March 2004 05:15
	Re: Inlet manifold designs	Cool1	Fri, 05 March 2004 07:44
	Re: Inlet manifold designs	Cool1	Mon, 08 March 2004 10:14
	Re: Inlet manifold designs	thechuckster	Mon, 08 March 2004 10:55
	Re: Inlet manifold designs	Cool1	Mon, 08 March 2004 11:19
	Re: Inlet manifold designs	rokusan	Tue, 04 January 2005 10:12
	Re: Inlet manifold designs	Cool1	Tue, 04 January 2005 10:34
	Re: Inlet manifold designs	rokusan	Tue, 04 January 2005 10:38
	Re: Inlet manifold designs	Cool1	Tue, 04 January 2005 10:40
	Re: Inlet manifold designs	rokusan	Tue, 04 January 2005 11:08
	Re: Inlet manifold designs	mrshin	Tue, 04 January 2005 11:09
	Re: Inlet manifold designs	rokusan	Tue, 04 January 2005 11:15
	Re: Inlet manifold designs	Kyosho	Tue, 04 January 2005 12:04
	Re: Inlet manifold designs	rokusan	Tue, 04 January 2005 12:09
	Re: Inlet manifold designs	mrshin	Tue, 04 January 2005 11:58
	Re: Inlet manifold designs	mrshin	Tue, 04 January 2005 12:16
	Re: Inlet manifold designs	foxtail	Wed, 05 January 2005 06:49
	Re: Inlet manifold designs	Cool1	Wed, 05 January 2005 06:58
	Re: Inlet manifold designs	rokusan	Wed, 05 January 2005 10:38
	Re: Inlet manifold designs	foxtail	Thu, 06 January 2005 01:47
	Re: Inlet manifold designs	rokusan	Thu, 06 January 2005 07:51
	Re: Inlet manifold designs	foxtail	Thu, 06 January 2005 10:24
	Re: Inlet manifold designs	Starfire	Thu, 06 January 2005 17:55

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