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ed_ma61 Forums Junkie Location: Lost in the K hole Registered: May 2002	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts.... Wed, 13 October 2004 14:58 stewy - i agree completely on the velocity thing... hence my concentration thus far on port X area. witness the 'small' 45mm throttle in comparison to some engines getting around. im even thinking of filling and reshaping the inside of the runners (of the stock manifold ill be cutting and modifying) with some kind of resin to keep the size down in some sections. the ports will not be hogged out, but i may open up the 'bottle neck' section described earler in order to keep the X area somewhat constant - this is a long way from the valve bowl though - so wont stuff around with velocities too much right up behind the valve. short of cleaning up the short side radius and the bowl transition, (and other casting dags and machine edges) i think ill be leaving the inlet reasonably alone. as for harmonics - two things seem important, length and dia length is as discussed, and still debatable (hehehe - would you use the open pipe harmonic formula, or the 'one end open, the other closed' formula?? both situations exist with the valve opening and closing!! where do you want the node!!??) the other question is - would it be an idea to place the throtle plate at the position of the middle node?? i think it would! for the tuned rpm i think it would have some impact - albiet a minor one! but it all counts (if not just in my anal mind!) now dia seems to be the BIGGEST factor, formula one designs refer to it over and over (more so than length) yet i can find SFA real data on it. i found the odd calculator, and the outputs make sense to me... but i hate blindly following a bunch of numbers. thoughts? phew... [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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