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ChrisTH Occasional Poster Location: Thailand Registered: September 2005	Re: fuel pump stops when hot (again) Fri, 07 October 2005 05:19 Maybe my comment about "Draining" the surge tank was not quite clear, so here is an explaination: If your lift pump has a higher flow rate than you VL pump, you do not need a surge tank! You will never get into a situation where the "buffer" is needed. If you need the surge tank, it means that the VL pump has a higher flow rate than the lift pump. So if you return the fuel from the rail directly to the main tank, you will end up draining the surge tank. Or... It will force the VL pump to assist pumping fuel from the main tank. In that case, what is the purpose of the tank and the lift pump? I did a bit of research and now I have a question. What is the purpose of the surge tank? From what I understand it is needed in the case you convert a carbu equipped engine to injection, but retain the mechanical fuel pump (where the flow depends on the engine rpm). The other case is when you have a multi speed high-pressure (HP) pump. On low speed the lift (feed) pump has a higher flow-rate than the HP pump, but the HP pump is able to double its flow and thereby getting a higher flow-rate than the feed pump. Then you need the buffer. Just a silly question. [Updated on: Fri, 07 October 2005 05:41] [Report message to a moderator]

	Subject	Poster	Date
	fuel pump stops when hot (again)	EVOSTi	Mon, 03 October 2005 09:44
	Re: fuel pump stops when hot (again)	sideshow	Mon, 03 October 2005 10:19
	Re: fuel pump stops when hot (again)	EVOSTi	Mon, 03 October 2005 10:41
	Re: fuel pump stops when hot (again)	ChrisTH	Mon, 03 October 2005 10:50
	Re: fuel pump stops when hot (again)	mrshin	Mon, 03 October 2005 14:08
	Re: fuel pump stops when hot (again)	shinybluesteel	Mon, 03 October 2005 14:36
	Re: fuel pump stops when hot (again)	EVOSTi	Tue, 04 October 2005 06:41
	Re: fuel pump stops when hot (again)	TurboRA28	Tue, 04 October 2005 23:31
	Re: fuel pump stops when hot (again)	EVOSTi	Wed, 05 October 2005 06:54
	Re: fuel pump stops when hot (again)	bunkyT18	Wed, 05 October 2005 08:23
	Re: fuel pump stops when hot (again)	EVOSTi	Wed, 05 October 2005 11:42
	Re: fuel pump stops when hot (again)	bunkyT18	Wed, 05 October 2005 12:06
	Re: fuel pump stops when hot (again)	EVOSTi	Wed, 05 October 2005 12:25
	Re: fuel pump stops when hot (again)	EVOSTi	Wed, 05 October 2005 12:34
	Re: fuel pump stops when hot (again)	xolent	Wed, 05 October 2005 13:10
	Re: fuel pump stops when hot (again)	shinybluesteel	Wed, 05 October 2005 13:38
	Re: fuel pump stops when hot (again)	ChrisTH	Wed, 05 October 2005 15:02
	Re: fuel pump stops when hot (again)	bunkyT18	Thu, 06 October 2005 01:31
	Re: fuel pump stops when hot (again)	bunkyT18	Thu, 06 October 2005 01:33
	Re: fuel pump stops when hot (again)	EVOSTi	Thu, 06 October 2005 10:56
	Re: fuel pump stops when hot (again)	shinybluesteel	Thu, 06 October 2005 13:45
	Re: fuel pump stops when hot (again)	ChrisTH	Fri, 07 October 2005 04:50
	Re: fuel pump stops when hot (again)	ChrisTH	Fri, 07 October 2005 05:19
	Re: fuel pump stops when hot (again)	ChrisTH	Fri, 07 October 2005 08:59
	Re: fuel pump stops when hot (again)	EVOSTi	Sat, 08 October 2005 01:31
	Re: fuel pump stops when hot (again)	ChrisTH	Sat, 08 October 2005 10:10
	Re: fuel pump stops when hot (again)	ChrisTH	Sat, 08 October 2005 14:43
	Re: fuel pump stops when hot (again)	EVOSTi	Sun, 09 October 2005 09:01
	Re: fuel pump stops when hot (again)	ChrisTH	Sun, 09 October 2005 11:21
	Re: fuel pump stops when hot (again)	EVOSTi	Mon, 10 October 2005 06:52
	Re: fuel pump stops when hot (again)	ChrisTH	Mon, 10 October 2005 08:29
	Re: fuel pump stops when hot (again)	ChrisTH	Tue, 11 October 2005 03:26
	Re: fuel pump stops when hot (again)	ChrisTH	Thu, 13 October 2005 14:27
	Re: fuel pump stops when hot (again)	EVOSTi	Sat, 15 October 2005 04:05
	Re: fuel pump stops when hot (again)	ChrisTH	Sat, 15 October 2005 04:20

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