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JustenGT4 Forums Junkie Location: Canberra Registered: June 2003	Re: custom plenum dimensions?? Wed, 19 October 2005 03:23 The longer the runners the better bottom to mid range torque you will have....shorter runners give better top end power. Actual ideal lengths are engine and use specific but staying as close as you can to the factory or a little shorter is a good rule of thumb. Plenum size should be roughly 1.5 to 2.5 times engine capacity but there are so many variables that impact on this that any volume in that range will be fine for general performance use. To chase every extra hp lurking in a setup requires testing testing testing so for most of us the rule of thumb type approach is fine. [Report message to a moderator]

	Subject	Poster	Date
	custom plenum dimensions??	LAA.80E	Mon, 17 October 2005 16:18
	Re: custom plenum dimensions??	DanielGVisser	Tue, 18 October 2005 22:06
	Re: custom plenum dimensions??	LAA.80E	Wed, 19 October 2005 01:10
	Re: custom plenum dimensions??	LAA.80E	Wed, 19 October 2005 01:11
	Re: custom plenum dimensions??	DanielGVisser	Wed, 19 October 2005 02:08
	Re: custom plenum dimensions??	Ben Wilson	Wed, 19 October 2005 02:41
	Re: custom plenum dimensions??	JustenGT4	Wed, 19 October 2005 03:23
	Re: custom plenum dimensions??	Fattony	Wed, 19 October 2005 03:25
	Re: custom plenum dimensions??	LAA.80E	Wed, 19 October 2005 13:31
	Re: custom plenum dimensions??	DanielGVisser	Wed, 19 October 2005 13:33
	Re: custom plenum dimensions??	LAA.80E	Wed, 19 October 2005 13:35
	Re: custom plenum dimensions??	Cool1	Thu, 20 October 2005 03:19
	Re: custom plenum dimensions??	Cool1	Thu, 20 October 2005 03:27
	Re: custom plenum dimensions??	TurboRA28	Thu, 20 October 2005 04:13
	Re: custom plenum dimensions??	oldcorollas	Thu, 20 October 2005 05:29
	Re: custom plenum dimensions??	TurboRA28	Thu, 20 October 2005 05:34
	Re: custom plenum dimensions??	oldcorollas	Thu, 20 October 2005 06:10
	Re: custom plenum dimensions??	Cool1	Thu, 20 October 2005 07:32
	Re: custom plenum dimensions??	oldcorollas	Fri, 21 October 2005 06:40
	Re: custom plenum dimensions??	Cool1	Thu, 20 October 2005 06:06
	Re: custom plenum dimensions??	oldcorollas	Thu, 20 October 2005 05:30
	Re: custom plenum dimensions??	LAA.80E	Thu, 20 October 2005 05:42
	Re: custom plenum dimensions??	ed_ma61	Thu, 20 October 2005 06:12
	Re: custom plenum dimensions??	LAA.80E	Thu, 20 October 2005 08:06
	Re: custom plenum dimensions??	TurboRA28	Thu, 20 October 2005 20:42
	Re: custom plenum dimensions??	LAA.80E	Fri, 21 October 2005 05:46
	Re: custom plenum dimensions??	kingmick	Fri, 21 October 2005 11:31
	Re: custom plenum dimensions??	LAA.80E	Fri, 21 October 2005 16:24

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