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thechuckster Forums Junkie Location: Brisbane Registered: February 2003	Re: 1G query... Sat, 15 January 2005 00:34 alterd wrote on Sat, 15 January 2005 09:13 I read an article on the net recently about a modified 1G-GTE that stated that 1G's have a set of butterflys "further down" in the inlet manifold (didn't say where) which stay closed at low RPM for better torque and open up for more flow at high RPM... the article advised taking them out for "more power" I've never heard of these before, and don't want to rip my inlet manifold off to find out if they exist, can anyone verify/disprove this?? Im trying to find the article again but havn't had any luck... the plate between the head and the runners contains a butterfly in every second runner (of which there are 2 per cyl) - look/search for TVIS and you will find much more... in a nutshell, they close off at low rpm so there is higher air-flow speeds down the` single-open runner for each cyl, net result is better engine response at lower rpm. a number of toyota engines have TVIS my 1g-gte does have this there's no benefit from removing them unless your aftermarket ECU cannot control it, or the butterfly's are stuck shut. [Updated on: Sat, 15 January 2005 00:35] [Report message to a moderator]

	Subject	Poster	Date
	1G query...	alterd	Fri, 14 January 2005 23:13
	Re: 1G query...	chrisellis	Fri, 14 January 2005 23:35
	Re: 1G query...	thechuckster	Sat, 15 January 2005 00:34
	Re: 1G query...	Ribbo	Sat, 15 January 2005 02:32
	Re: 1G query...	M.W.P.	Sat, 15 January 2005 11:30
	Re: 1G query...	HyDrA	Sat, 15 January 2005 23:39
	Re: 1G query...	680OST	Sun, 16 January 2005 01:15
	Re: 1G query...	ddeane	Sun, 16 January 2005 03:01
	Re: 1G query...	alterd	Sun, 16 January 2005 18:51

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