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Re: [GMCnet] Vacuum Advance [message #66072 is a reply to message #66065]

Mon, 30 November 2009 08:47

Jim Bounds

Messages: 842
Registered: January 2004

Karma:

Senior Member

You are right, dist diaphram must see 0 vacuum at idle, I think he is talking about what he sees at the ported output.

BTW guys, I betcha 50% of the coaches I run into has manifold vacuum to the dist.� The old story is never have a Chevy Man work on an Olds motor (except Steve F. that is).� They for some reason always connect the dist to manifold vacuum.� When they do this the motor retards the degrees set on acceleration-- no wonder the coach will roll like a flat rock!� Please guys, go check your coach, you might be surprised what you find!� Many tachs don;t recognize how important the vacuum routing is!

Can you tell this is a soap box I stand on?

Jim Bounds
--------------------------

----- Original Message ----
From: MDR <photovolt@comcast.net>
To: gmclist@temp.gmcnet.org
Sent: Mon, November 30, 2009 9:01:39 AM
Subject: Re: [GMCnet] Vacuum Advance

Are you sure you meant "manifold" vacuum?
If so, the advance will lose vacuum off idle and timing will retard.
The GM vacuum advance should be connected to ported vacuum.
MDR
--
Mark Ryan
1978 Kingsley
Pac. Northwest
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[Message index]

		Vacuum Advance By: jwillard on Sat, 28 November 2009 12:46
		Re: Vacuum Advance By: rgleas on Sat, 28 November 2009 12:58
		Re: Vacuum Advance By: Ken Burton on Sat, 28 November 2009 14:02
		Re: Vacuum Advance By: rgleas on Sat, 28 November 2009 14:38
		Re: [GMCnet] Vacuum Advance By: Steven Ferguson on Sat, 28 November 2009 16:18
		Re: [GMCnet] Vacuum Advance By: Ken Burton on Sat, 28 November 2009 17:10
		Re: [GMCnet] Vacuum Advance By: jwillard on Sat, 28 November 2009 17:51
		Re: [GMCnet] Vacuum Advance By: dmumert on Sat, 28 November 2009 18:22
		Re: [GMCnet] Vacuum Advance By: rgleas on Sat, 28 November 2009 20:06
		Re: [GMCnet] Vacuum Advance By: Gary Casey on Sat, 28 November 2009 20:50
		Re: [GMCnet] Vacuum Advance By: Ken Burton on Sun, 29 November 2009 15:45
		Re: Vacuum Advance By: rgleas on Sat, 28 November 2009 17:37
		Re: Vacuum Advance By: Ken Burton on Sat, 28 November 2009 22:09
		Re: Vacuum Advance By: Matt Colie on Sun, 29 November 2009 06:55
		Re: Vacuum Advance By: JohnL455 on Sat, 28 November 2009 18:57
		Re: Vacuum Advance By: JohnL455 on Sun, 29 November 2009 08:09
		Re: Vacuum Advance By: rgleas on Sun, 29 November 2009 08:25
		Re: Vacuum Advance By: mdryan on Sun, 29 November 2009 08:31
		Re: Vacuum Advance By: Ken Burton on Sun, 29 November 2009 08:44
		Re: Vacuum Advance By: Pete Papas on Sun, 29 November 2009 09:02
		Re: Vacuum Advance By: Ken Burton on Sun, 29 November 2009 09:22
		Re: Vacuum Advance By: jwillard on Sun, 29 November 2009 09:56
		Re: Vacuum Advance By: Ken Burton on Sun, 29 November 2009 14:39
		Re: Vacuum Advance By: roy1 on Sun, 29 November 2009 19:04
		Re: Vacuum Advance By: Ken Burton on Sun, 29 November 2009 23:29
		Re: [GMCnet] Vacuum Advance By: USAussie on Mon, 30 November 2009 01:01
		Re: [GMCnet] Vacuum Advance By: Ken Burton on Mon, 30 November 2009 01:53
		Re: [GMCnet] Vacuum Advance By: ljdavick on Mon, 30 November 2009 19:07
		Re: [GMCnet] Vacuum Advance By: mike miller on Mon, 30 November 2009 21:40
		Re: Vacuum Advance By: mdryan on Mon, 30 November 2009 08:01
		Re: [GMCnet] Vacuum Advance By: Jim Bounds on Mon, 30 November 2009 08:47
		Re: [GMCnet] Barbie GMC on eBay (#140362019346) By: k2gkk on Sun, 29 November 2009 11:06
		Re: [GMCnet] Vacuum Advance By: Steven Ferguson on Sun, 29 November 2009 15:49
		Re: Vacuum Advance By: fred v on Sun, 29 November 2009 14:23
		Re: Vacuum Advance By: Bob de Kruyff on Mon, 30 November 2009 16:32
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