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mrshin Forums Junkie Location: Montrose, VIC Registered: May 2002	Re: Davies Craig EWP Wed, 11 February 2004 01:58 This is all pretty simple, really The EWP 'efficiency' gains ARE possible, due to several facts: It's not going hard all the time It can spin at a much more constant speed, within its efficiency range. A water pump is only efficient around a certain speed range, much like a turbo, a fan, anything like that. However, there ARE always going to be (quite notable) losses going from the crank=>electricity=>pump. If someone can prove otherwise, please show me, as you've just invented perpetual motion The trouble seems to be that the Davies, Craig pump seems to be a pretty nasty design. Cheap plastic, with what appears to be very little thought put into impeller design, etc. I looked into getting one, then decided to avoid it. The idea is good, the execution is poor... On the topic of electric fans... They have advantages in that they don't run flat out when you're cruising at 160km/h, saving resultant noise and power. However, electric fans aren't ALL good - when they're on, the efficiency is less, plus even the biggest electric fan can't pull anything like the amount of air a decent engine fan can. A clutch fan does save a lot of the power sapping tendencies anyway, the only disadvantage is that they don't shift much air when you're sitting in traffic. I think Davies, Craig still advertise the horsepower gains of fitting electric fans to an LX Torana 308, don't they? Hardly the pinnacle of cooling system design is it! Something like 19hp at the wheels difference - on an engine with a solid steel 'finger chopper' fan with -duh- no clutch... That's my thoughts on it all for the moment anyway, thanks everyone for listening [Report message to a moderator]

	Subject	Poster	Date
	Davies Craig EWP	Andres	Tue, 10 February 2004 02:51
	Re: Davies Craig EWP	TurboRA28	Tue, 10 February 2004 02:57
	Re: Davies Craig EWP	ed_ma61	Tue, 10 February 2004 02:58
	Re: Davies Craig EWP	SupraPete	Tue, 10 February 2004 03:02
	Re: Davies Craig EWP	Andres	Tue, 10 February 2004 03:09
	Re: Davies Craig EWP	SupraPete	Tue, 10 February 2004 03:32
	Re: Davies Craig EWP	roger	Tue, 10 February 2004 04:59
	Re: Davies Craig EWP	CrUZsida	Tue, 10 February 2004 05:12
	Re: Davies Craig EWP	KDog	Tue, 10 February 2004 05:40
	Re: Davies Craig EWP	CrUZsida	Tue, 10 February 2004 05:50
	Re: Davies Craig EWP	Stefan	Tue, 10 February 2004 14:53
	Re: Davies Craig EWP	CrUZsida	Tue, 10 February 2004 04:40
	Re: Davies Craig EWP	Andres	Tue, 10 February 2004 05:01
	Re: Davies Craig EWP	CrUZsida	Tue, 10 February 2004 05:14
	Re: Davies Craig EWP	Andres	Tue, 10 February 2004 05:06
	Re: Davies Craig EWP	roger	Tue, 10 February 2004 05:47
	Re: Davies Craig EWP	Andres	Tue, 10 February 2004 05:50
	Re: Davies Craig EWP	CrUZsida	Tue, 10 February 2004 05:53
	Re: Davies Craig EWP	roger	Tue, 10 February 2004 05:56
	Re: Davies Craig EWP	ed_ma61	Tue, 10 February 2004 06:06
	Re: Davies Craig EWP	ed_ma61	Tue, 10 February 2004 05:53
	Re: Davies Craig EWP	Andres	Tue, 10 February 2004 05:59
	Re: Davies Craig EWP	CrUZsida	Tue, 10 February 2004 06:02
	Re: Davies Craig EWP	E30-323ti	Tue, 10 February 2004 22:23
	Re: Davies Craig EWP	KDog	Tue, 10 February 2004 06:07
	Re: Davies Craig EWP	KDog	Tue, 10 February 2004 06:11
	Re: Davies Craig EWP	Andres	Tue, 10 February 2004 06:12
	Re: Davies Craig EWP	oldcorollas	Tue, 10 February 2004 10:06
	Re: Davies Craig EWP	oldcorollas	Tue, 10 February 2004 10:14
	Re: Davies Craig EWP	Nark	Tue, 10 February 2004 10:19
	Re: Davies Craig EWP	Andres	Tue, 10 February 2004 10:24
	Re: Davies Craig EWP	T APLUS 22	Tue, 10 February 2004 11:16
	Re: Davies Craig EWP	KDog	Tue, 10 February 2004 21:28
	Re: Davies Craig EWP	TerryOBeirne	Tue, 10 February 2004 21:47
	Re: Davies Craig EWP	Andres	Tue, 10 February 2004 22:15
	Re: Davies Craig EWP	mrshin	Wed, 11 February 2004 01:58
	Re: Davies Craig EWP	Allan	Wed, 11 February 2004 13:01
	Re: Davies Craig EWP	oldcorollas	Wed, 11 February 2004 13:06
	Re: Davies Craig EWP	oldcorollas	Wed, 11 February 2004 14:08
	Re: Davies Craig EWP	cseufert	Mon, 18 October 2004 12:37
	Re: Davies Craig EWP	CrUZsida	Mon, 18 October 2004 14:26
	Re: Davies Craig EWP	indigoid	Mon, 18 October 2004 19:45
	Re: Davies Craig EWP	BlackSupra	Tue, 19 October 2004 03:03
	Re: Davies Craig EWP	RWDboy	Tue, 19 October 2004 04:00

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