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oldcorollas Forums Junkie Location: Kita-Ku, Sapporo, Japan Registered: January 2003	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts.... Mon, 11 October 2004 15:13 fwiw, you can calculate your own harmonic length using standard theory. the speed of sound will that close to room temp (and easily found) compared to the higher speed of sound in hot exhaust gas (making it more difficult to accurately calculate). i have a vague recollection that havign a continually tapering intake is ideal, so that the charge continually. but smoothly, increases in velocity. something i've been thinking lately is that using the valve head area is not exactly correct.. the air only has the open spce between valve and seat to flow ie valve circumference x lift. which lift you choose to use? maybe mid to 2/3rds? just a quicky, why are you aiming for second harmonics, not 1st harmonics? second will give lower, but wider peak, and less negative effects either side, but where will your 1st harmonic occur in rpm? mmm tis late.. think later Cya, Stewart [Report message to a moderator]

	Subject	Poster	Date
	ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Mon, 11 October 2004 14:59
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	oldcorollas	Mon, 11 October 2004 15:13
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Mon, 11 October 2004 15:16
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Mon, 11 October 2004 15:23
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	bbaacchhyy	Mon, 11 October 2004 21:25
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	takai	Mon, 11 October 2004 21:43
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	bbaacchhyy	Mon, 11 October 2004 22:15
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Steve_Reynolds	Mon, 11 October 2004 23:10
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	gianttomato	Mon, 11 October 2004 23:22
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Ben Wilson	Tue, 12 October 2004 05:25
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	gianttomato	Wed, 13 October 2004 13:05
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	thechuckster	Wed, 13 October 2004 13:38
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	oldcorollas	Wed, 13 October 2004 13:51
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Wed, 13 October 2004 14:45
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Bill Sherwood	Wed, 13 October 2004 14:48
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Wed, 13 October 2004 15:04
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Wed, 13 October 2004 14:58
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Bill Sherwood	Wed, 13 October 2004 15:06
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Bill Sherwood	Wed, 13 October 2004 15:07
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Wed, 13 October 2004 15:30
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Wed, 13 October 2004 15:40
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Bill Sherwood	Wed, 13 October 2004 15:40
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Wed, 13 October 2004 15:42
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Bill Sherwood	Wed, 13 October 2004 15:45
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Wed, 13 October 2004 15:50
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	bbaacchhyy	Wed, 13 October 2004 21:36
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Thu, 14 October 2004 01:34
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	bbaacchhyy	Thu, 14 October 2004 02:08
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Thu, 14 October 2004 02:26
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	moo4AGZETA22	Thu, 14 October 2004 02:49
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	bbaacchhyy	Thu, 14 October 2004 03:09
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	gianttomato	Thu, 14 October 2004 03:52
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Thu, 14 October 2004 04:15
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	gianttomato	Thu, 14 October 2004 04:27
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	bbaacchhyy	Thu, 14 October 2004 05:06
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	gianttomato	Thu, 14 October 2004 05:21
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	bbaacchhyy	Thu, 14 October 2004 05:32
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	boxh34d	Thu, 14 October 2004 12:21
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Fri, 15 October 2004 00:22
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	justcallmefrank	Fri, 15 October 2004 00:39
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	mrshin	Thu, 14 October 2004 12:54
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	RWDboy	Thu, 14 October 2004 14:51
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Bill Sherwood	Thu, 14 October 2004 15:17
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	gianttomato	Thu, 14 October 2004 21:25
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Thu, 14 October 2004 23:42
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Fri, 15 October 2004 00:33
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Fri, 15 October 2004 00:46
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	justcallmefrank	Fri, 15 October 2004 00:50
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Fri, 15 October 2004 00:51
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	justcallmefrank	Fri, 15 October 2004 00:56
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	justcallmefrank	Fri, 15 October 2004 01:00
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Fri, 15 October 2004 02:35
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	SupraPete	Fri, 15 October 2004 02:55
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	SupraPete	Fri, 15 October 2004 02:45
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Fri, 15 October 2004 02:59
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Fri, 15 October 2004 03:01
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	SupraPete	Fri, 15 October 2004 03:11
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	SupraPete	Fri, 15 October 2004 03:21
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	SupraPete	Fri, 15 October 2004 03:14
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	RWDboy	Fri, 15 October 2004 03:19
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Fri, 15 October 2004 03:26
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	SupraPete	Fri, 15 October 2004 03:28
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Fri, 15 October 2004 03:35
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	gianttomato	Fri, 15 October 2004 03:55
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Bill Sherwood	Fri, 15 October 2004 04:44
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Fri, 15 October 2004 04:50
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	CelicaRA45	Sat, 16 October 2004 03:38
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	mrshin	Sat, 16 October 2004 13:30
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Bill Sherwood	Sat, 16 October 2004 13:55
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	mrshin	Sat, 16 October 2004 14:37
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	RWDboy	Sun, 17 October 2004 08:29
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Sun, 17 October 2004 10:12
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	RWDboy	Sun, 17 October 2004 11:12
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Sun, 17 October 2004 12:13
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Bill Sherwood	Sun, 17 October 2004 13:19
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	ed_ma61	Sun, 17 October 2004 22:55
	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts....	Bill Sherwood	Mon, 18 October 2004 02:40

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