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oldcorollas Forums Junkie Location: Kita-Ku, Sapporo, Japan Registered: January 2003	Re: Quad throttle body adapter plate Sat, 19 November 2005 01:29 ahh i meant how much do the actual quad throtles go for.. i was thinking of picking a few up as for the restrictor thing... ppl do it different ways.. the idea of the restrictor is to reduce the amount of air that is pulled during each "suck", and also reduce the backflow when the cylinder is not sucking.. it basically just reduces the amplitude of vacuum change. a very easy way to make a restrictor is to get MIG welding tips... ppl use maybe 0.8 to 1.2mm tips (ie hole size) and the outside is maybe.. 4-5mm diameter? so it can be slipped inline with nirmal vacuum tube some people run a restrictor between each runner and the chamber. others connect all the ports together and then put the restrictor after the join, so there is only a single restrictor.... i don't know which is best. some peple also run the restrictor _after_ the chamber... for me i just had high overlap cam, and the take off point was on the plenum (no quads) so i didn't have a choice.. i just ran 1.2mm restrictor and a Ryco carby fuel filter (which got strange looks as it was incabin ) so basically... you can experiment.. it helps to have realtime datalogging capability on your ECU so you can see changes in the MAP quality. a pack of MIG welding "contact tips" is like $5 for 5 or something, bloody cheap... get maybe 0.8 or 0.9 as a start.. you can always cut them in half and drill out to larger size later... at first try with lines connected and no chamber... then with chamber then with restrictor before chamber then with restrictor in each line before joining you can graph what is likely to happen.... each suck is a negative pulse that is kinda sinusoidal for as long as i lasts (which at idle is basically the time the piston is going down, ie 180 crank degrees, or 1/4 of engine cycle) yar, Megasquirt.. a wealth of EFI info for anyone who wants to learn [Report message to a moderator]

	Subject	Poster	Date
	Quad throttle body adapter plate	drift_rolla	Wed, 16 November 2005 09:46
	Re: Quad throttle body adapter plate	shinybluesteel	Wed, 16 November 2005 09:48
	Re: Quad throttle body adapter plate	Big T	Wed, 16 November 2005 09:57
	Re: Quad throttle body adapter plate	drift_rolla	Wed, 16 November 2005 10:11
	Re: Quad throttle body adapter plate	Big T	Wed, 16 November 2005 10:40
	Re: Quad throttle body adapter plate	xolent	Wed, 16 November 2005 11:11
	Re: Quad throttle body adapter plate	ae86drift	Wed, 16 November 2005 13:17
	Re: Quad throttle body adapter plate	Windex	Wed, 16 November 2005 21:09
	Re: Quad throttle body adapter plate	shinybluesteel	Thu, 17 November 2005 07:44
	Re: Quad throttle body adapter plate	Windex	Thu, 17 November 2005 12:36
	Re: Quad throttle body adapter plate	old_mr2	Thu, 17 November 2005 18:02
	Re: Quad throttle body adapter plate	ae86drift	Fri, 18 November 2005 01:50
	Re: Quad throttle body adapter plate	takai	Fri, 18 November 2005 02:19
	Re: Quad throttle body adapter plate	Windex	Fri, 18 November 2005 07:02
	Re: Quad throttle body adapter plate	shinybluesteel	Fri, 18 November 2005 07:05
	Re: Quad throttle body adapter plate	Big T	Fri, 18 November 2005 09:24
	Re: Quad throttle body adapter plate	drift86levin	Fri, 18 November 2005 13:01
	Re: Quad throttle body adapter plate	ae86drift	Fri, 18 November 2005 13:36
	Re: Quad throttle body adapter plate	oldcorollas	Fri, 18 November 2005 20:05
	Re: Quad throttle body adapter plate	ae86drift	Fri, 18 November 2005 23:46
	Re: Quad throttle body adapter plate	oldcorollas	Sat, 19 November 2005 01:29
	Re: Quad throttle body adapter plate	oldcorollas	Sat, 19 November 2005 01:32
	Re: Quad throttle body adapter plate	shinybluesteel	Sat, 19 November 2005 02:30
	Re: Quad throttle body adapter plate	oldcorollas	Sat, 19 November 2005 05:40
	Re: Quad throttle body adapter plate	b1gb3n	Sun, 20 November 2005 18:29
	Re: Quad throttle body adapter plate	ae86drift	Sun, 20 November 2005 21:48
	Re: Quad throttle body adapter plate	oldcorollas	Mon, 21 November 2005 00:39
	Re: Quad throttle body adapter plate	xolent	Sat, 19 November 2005 00:50
	Re: Quad throttle body adapter plate	takai	Sat, 19 November 2005 06:48
	Re: Quad throttle body adapter plate	oldcorollas	Sat, 19 November 2005 07:03
	Re: Quad throttle body adapter plate	ae86drift	Mon, 21 November 2005 01:09
	Re: Quad throttle body adapter plate	SR20 trueno	Sun, 20 November 2005 01:57
	Re: Quad throttle body adapter plate	takai	Mon, 21 November 2005 01:52
	Re: Quad throttle body adapter plate	ae86drift	Mon, 21 November 2005 06:25
	Re: Quad throttle body adapter plate	drift86levin	Mon, 21 November 2005 12:28
	Re: Quad throttle body adapter plate	takai	Mon, 21 November 2005 21:20
	Re: Quad throttle body adapter plate	ae86drift	Mon, 21 November 2005 21:51

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