[DeTomaso] Vacuum Advance - ported or full vacuum source

[dennis617 at aol.com]

But unless I don't understand something, that shouldn't matter since under open throttle the vacuum advance drops out of the equation anyway.



-----Original Message-----
From: gow2 <gow2 at rc-tech.net>
To: dennis617 <dennis617 at aol.com>
Cc: detomaso <detomaso at realbig.com>
Sent: Mon, Aug 27, 2012 10:47 am
Subject: Re: [DeTomaso] Vacuum Advance - ported or full vacuum source


Simple answer.

ith ported you have no vacuum at idle. Manifold you have vacuum at idle.
You gain the ability to advance your timing at idle with Manifold. This
ives you better throttle response and can help the engine run cooler.
Switching from ported to manifold you might end up with more total timing
hen you had which means you might need to reduce total timing.
Gary


>
 Does anyone have an opinion on which source I should use for my vacuum
 advance on my Mallory Unilite distributor, full vacuum directly from the
 intake manifold or ported vacuum from the Holley 650 double pumper?  I
 have a mostly stock engine with an Edlebrock Performer intake manifold.  I
 have recieved conflicting information from Holley and Mallory, Holley
 claims that I should use the ported vacuum at the carb and Mallory said I
 should use full vacuum from the intake manifold.
 _______________________________________________

 Detomaso Forum Managed by POCA

 Archive Search Engine Now Available at http://www.realbig.com/detomaso/

 DeTomaso mailing list
 DeTomaso at list.realbig.com
 http://list.realbig.com/mailman/listinfo/detomaso