Manifold vacuum - try it! - Moparts Forums

Print Thread

Manifold vacuum - try it! #1198215 03/17/12 12:52 AM 03/17/12 12:52 AM
Joined: Jul 2011 Posts: 817 Eugene, Oregon Secret Chimp OP super stock
Secret Chimp OP super stock Joined: Jul 2011 Posts: 817 Eugene, Oregon	I'd been reading around on FBO and other authorities on vacuum advance for a couple weeks. This old article in particular pulled me over: https://board.moparts.org/ubbthreads/showflat.php?Number=4711501&page=2391 I decided to try connecting my distributor to a full manifold vacuum source just to see what it would do. What's the worst that could happen? Results: smoother idle, QUIETER idle, and a stronger step-off since all of the advance is already pulled in vs. the delay from using the ported source. My idle is absolutely rock steady at 800 rpm and I picked up a couple of inches of vacuum in drive. Drives exactly the same after it's rolling, of course. I didn't get a chance to fiddle with the actuation curve with my Mityvac yet, but just as it is right now is an amazing improvement for no more effort than switching a hose and a plug and reducing my idle setting a half-turn. I didn't even need to touch my initial timing of 12 degrees. And this is just some old janky pre-Mallory MP distributor, not an FBO unit. Try it! 1967 Dodge Coronet Deluxe station wagon 1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s

Entire Thread
Subject	Posted By	Posted
Manifold vacuum - try it!	Secret Chimp	03/17/12 04:52 AM
Re: Manifold vacuum - try it!	Kern Dog	03/17/12 04:57 AM
Re: Manifold vacuum - try it!	1_WILD_RT	03/17/12 05:18 AM
Re: Manifold vacuum - try it!	Secret Chimp	03/17/12 05:20 AM
Re: Manifold vacuum - try it!	Dodgem	03/17/12 04:12 PM
Re: Manifold vacuum - try it!	AndyF	03/17/12 05:46 AM
Re: Manifold vacuum - try it!	Secret Chimp	03/17/12 05:57 AM
Re: Manifold vacuum - try it!	Cab_Burge	03/17/12 06:18 AM
Re: Manifold vacuum - try it!	1_WILD_RT	03/17/12 06:20 AM
Re: Manifold vacuum - try it!	383man	03/17/12 07:57 AM
Re: Manifold vacuum - try it!	DaytonaTurbo	03/17/12 08:10 AM
Re: Manifold vacuum - try it!	Dodgem	03/17/12 04:13 PM
Re: Manifold vacuum - try it!	YO7_A66	03/17/12 04:47 PM
Re: Manifold vacuum - try it!	DARTH V8Я	03/17/12 04:54 PM
Re: Manifold vacuum - try it!	Dodgem	03/17/12 06:12 PM
Re: Manifold vacuum - try it!	Mattax	03/17/12 02:09 PM
Re: Manifold vacuum - try it!	1MYTGTX	03/17/12 02:27 PM
Re: Manifold vacuum - try it!	can.al	03/17/12 02:40 PM
Re: Manifold vacuum - try it!	Rug_Trucker	03/17/12 03:19 PM
Re: Manifold vacuum - try it!	RapidRobert	03/17/12 03:51 PM
Re: Manifold vacuum - try it!	can.al	03/17/12 10:06 PM
Re: Manifold vacuum - try it!	astjp2	03/18/12 01:46 AM
Re: Manifold vacuum - try it!	hooziewhatsit	03/18/12 02:48 AM
Re: Manifold vacuum - try it!	roe	03/18/12 04:14 AM
Re: Manifold vacuum - try it!	Magnum	03/18/12 04:23 PM
Re: Manifold vacuum - try it!	pjc360	03/19/12 03:52 AM
Re: Manifold vacuum - try it!	Mattax	03/19/12 08:09 PM
Re: Manifold vacuum - try it!	pjc360	03/19/12 11:49 PM
Re: Manifold vacuum - try it!	Dodgem	03/20/12 02:33 PM
Re: Manifold vacuum - try it!	RemCharger	03/20/12 03:23 PM
Re: Manifold vacuum - try it!	70VcodeCoronetRT	03/20/12 11:41 PM
Re: Manifold vacuum - try it!	Secret Chimp	03/21/12 12:48 AM
Re: Manifold vacuum - try it!	70VcodeCoronetRT	03/21/12 12:53 AM
Re: Manifold vacuum - try it!	GomangoCuda	03/19/12 07:16 PM
Re: Manifold vacuum - try it!	YO7_A66	03/17/12 08:10 PM

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To