[DeTomaso] Vacuum advance, ported or manifold, age old question answered
SG
sdlgibson at sbcglobal.net
Sun Mar 18 10:30:38 EDT 2012
Does manifold vacuum have anything to do with starting....or just initial advance? Hmmmm
Shaun Gibson
--- On Sun, 3/18/12, Mikael <mikael_hass at mail.tele.dk> wrote:
From: Mikael <mikael_hass at mail.tele.dk>
Subject: [DeTomaso] Vacuum advance, ported or manifold, age old question answered
To: DeTomaso at realbig.com
Date: Sunday, March 18, 2012, 2:10 AM
I found this chart on the web, two map sensors and a throttle position
sensor clearly shows that except at idle, ported and manifold vacuum is the
same. So when you need to decide whether to use ported or manifold vacuum,
let your idle decide. If vacuum advance helps your idle and doesn't make it
hard to start, go directly to manifold. If the additional advance makes
starting hard, use ported vacuum instead.
Now all we need to sort out is the meaning of life...
Vacuum Chart
http://www.gofastforless.com/ignition/vacuum_chart.jpg
Mikael
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