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fester Regular Location: Gympie Qld Registered: December 2004	Re: 20V trumpets. Fri, 07 January 2005 08:50 I am not sure exactly what you mean by your 45% flare, is that just at the tip. There was a tunin ook put out by David Visard for the A Sereis Mini engine that comapred flow restrictions with different inlets on an SU carb. Thsi was off the engine to just compare maximum flow throught carby with different shape entries. A straight extension of pipe 3" long reduced flow by 6.7%. A pipe with a 7% taper from end to end reduced it by 5.5% A 7% taper with a 1/8th radius reduced it by 1.2% A 7% taper with 1/8th radius but rolled back 270% increased it by 4.4% With a 1/4 radius and same roll back and taper increased it by 5.2% The largest increase was by a 3/4 pipe that had an eliptical flare right round. This increased it by 5.8% A 2" pipe with 10% taper, 1/4 radius and 270% rollback incrreased it by 5.5%. He goes on to state that anythin with a radius over about 1/8th is going to work reasonably well. If the radius is noty totally formed ie does nto roll back on itself then as long as it turns out at least 60% iit will work. not sure how that relates to your 45% but I'd like to see the end result. Gavin [Report message to a moderator]

	Subject	Poster	Date
	20V trumpets.	AbaddonGZE	Tue, 04 February 2003 08:05
	Re: 20V trumpets.	roadrunner	Tue, 04 February 2003 08:15
	Re: 20V trumpets.	AbaddonGZE	Tue, 04 February 2003 08:47
	Re: 20V trumpets.	Sam	Wed, 05 February 2003 03:29
	Re: 20V trumpets.	AbaddonGZE	Wed, 05 February 2003 05:00
	Re: 20V trumpets.	EvilJack	Wed, 05 February 2003 05:55
	Re: 20V trumpets.	AbaddonGZE	Wed, 05 February 2003 06:23
	Re: 20V trumpets.	mrshin	Wed, 05 February 2003 09:57
	Re: 20V trumpets.	roadrunner	Wed, 05 February 2003 10:22
	Re: 20V trumpets.	Bugman	Wed, 05 February 2003 10:42
	Re: 20V trumpets.	AbaddonGZE	Wed, 05 February 2003 10:57
	Re: 20V trumpets.	AbaddonGZE	Wed, 05 February 2003 11:06
	Re: 20V trumpets.	Bugman	Wed, 05 February 2003 11:07
	Re: 20V trumpets.	Bugman	Wed, 05 February 2003 11:08
	Re: 20V trumpets.	AbaddonGZE	Wed, 05 February 2003 11:39
	Re: 20V trumpets.	Bugman	Wed, 05 February 2003 11:46
	Re: 20V trumpets.	BigWorm	Wed, 05 February 2003 12:14
	Re: 20V trumpets.	Sam	Wed, 05 February 2003 21:26
	Re: 20V trumpets.	Sam	Fri, 07 February 2003 07:29
	Re: 20V trumpets.	mrshin	Fri, 07 February 2003 07:49
	Re: 20V trumpets.	AbaddonGZE	Fri, 07 February 2003 07:54
	Re: 20V trumpets.	munki	Sat, 08 February 2003 09:45
	Re: 20V trumpets.	Sven	Tue, 04 January 2005 00:43
	Re: 20V trumpets.	clubagreenie	Fri, 07 February 2003 14:34
	Re: 20V trumpets.	mrpats	Sun, 09 February 2003 03:34
	Re: 20V trumpets.	7mgtema71	Tue, 04 January 2005 01:23
	Re: 20V trumpets.	Mr Revhead	Tue, 04 January 2005 02:59
	Re: 20V trumpets.	emmac	Wed, 05 January 2005 01:35
	Re: 20V trumpets.	Starfire	Wed, 05 January 2005 16:07
	Re: 20V trumpets.	Sam_Q	Thu, 06 January 2005 11:35
	Re: 20V trumpets.	fester	Thu, 06 January 2005 12:33
	Re: 20V trumpets.	Sam_Q	Thu, 06 January 2005 13:01
	Re: 20V trumpets.	fester	Fri, 07 January 2005 08:50
	Re: 20V trumpets.	ae86drift	Fri, 07 January 2005 08:55
	Re: 20V trumpets.	Mr Revhead	Fri, 07 January 2005 09:09

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