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BigWorm Forums Junkie Toymods Board Member I supported Toymods Location: Turramurra, Sydney. Registered: May 2002	Re: 4age bigport TVIS Sat, 11 October 2003 10:43 Quote: Dise3ngaging the tvis with give you smoother driveability and small power gain from the midrange to the top end of the rpm scale. I did this to my car.. I actually removed the tvis plate altogether and bolted the manifold straight up to the head and YES it did make a difference. Gee, there's a fair difference between disengaging the T-VIS & removing the plate altogether. And the manifold doesn't really bolt straight up, as the 2 end studs are too long without the t-vis. I havn't done "your conversion", no, but I have removed the T-VIS plate & installed a phenolic spacer in place of it, but that's in preperation for my turbo conversion, not to try to gain more power while it's still relatively standard. So you dyno'd your car before & again straight after performing only this modification? On the same dyno? And with exactly the same conditions in both instance? 4kW could easily come down to slightly different ambient temps & dyno error. No, disinformation doesn't help, especially when people are here trying to learn about these things & take what they hear as the truth. Your first post is very misleading to what you're saying now. Next time be a bit (a lot) more specific when refering to technical topics, disengaging has a very different meaning to removing altogether. Chuck, there really is no smarts deciding when to switch over t-vis, it simply happens at a set rpm (don't know if the 1G is the same as a 4A) and if the megasquirt has an aux output, simply set it to switch the vac switch at a given rpm. T-VIS is really a rather complicated system to get working as well as it does, unless your motor has at least bigger cams or is turbo'd etc, it would go better with the t-vis active. [Report message to a moderator]

	Subject	Poster	Date
	4age bigport TVIS	ae95	Sun, 05 October 2003 11:45
	Re: 4age bigport TVIS	FKN16V	Sun, 05 October 2003 12:48
	Re: 4age bigport TVIS	BigWorm	Sun, 05 October 2003 13:01
	Re: 4age bigport TVIS	SLY16V	Sun, 05 October 2003 15:24
	Re: 4age bigport TVIS	ae95	Sun, 05 October 2003 15:32
	Re: 4age bigport TVIS	nos4ag	Mon, 06 October 2003 05:08
	Re: 4age bigport TVIS	SLY16V	Mon, 06 October 2003 09:34
	Re: 4age bigport TVIS	feral4mr2	Mon, 06 October 2003 12:32
	Re: 4age bigport TVIS	BigWorm	Mon, 06 October 2003 15:44
	Re: 4age bigport TVIS	THE WITZL	Tue, 07 October 2003 00:01
	Re: 4age bigport TVIS	ae95	Tue, 07 October 2003 05:55
	Re: 4age bigport TVIS	TurboRA28	Tue, 07 October 2003 06:57
	Re: 4age bigport TVIS	TurboRA28	Tue, 07 October 2003 06:58
	Re: 4age bigport TVIS	ae95	Tue, 07 October 2003 07:20
	Re: 4age bigport TVIS	causinmayhem	Tue, 07 October 2003 12:36
	Re: 4age bigport TVIS	nos4ag	Tue, 07 October 2003 13:13
	Re: 4age bigport TVIS	BigWorm	Tue, 07 October 2003 14:28
	Re: 4age bigport TVIS	nos4ag	Sat, 11 October 2003 07:26
	Re: 4age bigport TVIS	thechuckster	Sat, 11 October 2003 08:50
	Re: 4age bigport TVIS	BigWorm	Sat, 11 October 2003 10:43
	Re: 4age bigport TVIS	thechuckster	Sat, 11 October 2003 13:34
	Re: 4age bigport TVIS	BigWorm	Sun, 12 October 2003 07:48

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