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TE72_Turbo Forums Junkie Location: Canberra Registered: May 2002	Re: external wastegate with two vacuum line connections? Sun, 19 June 2005 12:08 Quote: so the connection that feeds to the top of the diaphragm connects to the compressor housing and the one that feeds to the underside of the diaphragm connects to the bleed valve/boost controler? NO NO NO NO NO!! You definately do not want to hook the fitting on top of the diaphragm directly to a boost source, this will ensure that the wastegate valve cannot lift off its seat (cause effectively you are pushing it into the seat, not lifting it off!), so that you will get as much boost as the turbo can produce!! To get the preset wastegate pressure (determined by the spring rate), you would connect only 1 boost reference line to the fitting BELOW the diaphragm. There are two options for boost control if you want more boost: 1.) bleed off a certain amount of air from this reference source below the diaphragm 2.) use some form of restriction to feed a small percentage of the boost pressure into the fitting on TOP of the diaphragm (in addition to full boost pressure below the diaphragm), effectively reducing the pressure underneath to increase the pressure at which the valve will lift off the seat. Someone please correct me if they have found otherwise with their EXTERNAL wastegates. Cheers Phil [Updated on: Sun, 19 June 2005 12:11] [Report message to a moderator]

	Subject	Poster	Date
	external wastegate with two vacuum line connections?	cri_ag	Sun, 19 June 2005 11:19
	Re: external wastegate with two vacuum line connections?	Cool1	Sun, 19 June 2005 11:21
	Re: external wastegate with two vacuum line connections?	cri_ag	Sun, 19 June 2005 11:34
	Re: external wastegate with two vacuum line connections?	Cool1	Sun, 19 June 2005 11:41
	Re: external wastegate with two vacuum line connections?	cri_ag	Sun, 19 June 2005 11:55
	Re: external wastegate with two vacuum line connections?	Cool1	Sun, 19 June 2005 12:02
	Re: external wastegate with two vacuum line connections?	Cool1	Sun, 19 June 2005 12:05
	Re: external wastegate with two vacuum line connections?	TE72_Turbo	Sun, 19 June 2005 12:08
	Re: external wastegate with two vacuum line connections?	Cool1	Sun, 19 June 2005 12:20
	Re: external wastegate with two vacuum line connections?	cri_ag	Sun, 19 June 2005 12:15
	Re: external wastegate with two vacuum line connections?	cri_ag	Sun, 19 June 2005 12:26
	Re: external wastegate with two vacuum line connections?	Chris Davey	Mon, 20 June 2005 02:32
	Re: external wastegate with two vacuum line connections?	JustenGT4	Mon, 20 June 2005 03:47
	Re: external wastegate with two vacuum line connections?	TE72_Turbo	Mon, 20 June 2005 05:59
	Re: external wastegate with two vacuum line connections?	Joshstix	Mon, 20 June 2005 06:05
	Re: external wastegate with two vacuum line connections?	JustenGT4	Mon, 20 June 2005 22:47
	Re: external wastegate with two vacuum line connections?	oldcorollas	Tue, 02 August 2005 13:26
	Re: external wastegate with two vacuum line connections?	Chris Davey	Mon, 20 June 2005 23:11
	Re: external wastegate with two vacuum line connections?	ae95	Tue, 02 August 2005 07:36
	Re: external wastegate with two vacuum line connections?	Chris Davey	Tue, 02 August 2005 09:30
	Re: external wastegate with two vacuum line connections?	ae95	Tue, 02 August 2005 10:42
	Re: external wastegate with two vacuum line connections?	rb30 boy	Tue, 02 August 2005 12:01
	Re: external wastegate with two vacuum line connections?	Chris Davey	Tue, 02 August 2005 22:33
	Re: external wastegate with two vacuum line connections?	ae95	Tue, 02 August 2005 13:07
	Re: external wastegate with two vacuum line connections?	rb30 boy	Tue, 02 August 2005 13:15
	Re: external wastegate with two vacuum line connections?	rb30 boy	Tue, 02 August 2005 13:20
	Re: external wastegate with two vacuum line connections?	ae95	Tue, 02 August 2005 13:35
	Re: external wastegate with two vacuum line connections?	MS-75	Wed, 03 August 2005 02:40

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