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takai Forums Junkie Location: Adelaide Registered: May 2003	Re: ITBs & Port X-Sectional Areas + Lengths : Your Thoughts.... Mon, 11 October 2004 21:43 The runner configuration on the TODA engine is reasonably optimal, but from memory they had to elevate the ITBs by a huge margin, due to the design being for FWD, where the 3S is rocked back. Otherwise the throttles wouldnt clear other bits in the engine bay. From memory (been a good year or so) the last time i looked at a 3S they didnt have a huge intake angle, and it looked relatively similar to a 4A. So judging by the 4A intake tracts (which were designed for RWD), which i have included a picture of below, im lead to believe that the 3S angle is suboptimal. From everythign ive read, the 4A tracts are pretty optimal for their design, and use only an 8" tract from butterfly to valve, although its effective 14" at WOT. On the 2JZ (or is it the 3S) with the reduction of intake size around the head entrance, i believe this is suboptimal for a high rpm power band, but more beneficial for lower end torque. Mainly due to higher intake velocities etc. It was the same principle behind the whole TVIS system. Personally i would be wanting to enlarge the head porting to around 13-14cm^2 Anyway, thats just my thoughts. [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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