Re: vacuum retard, ported vacuum question - Saab 900 Bulletin Board - Saabnet.com
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Re: vacuum retard, ported vacuum question
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Posted by Paul Bob [Email] (more from Paul Bob) on Tue, 2 Jun 2015 15:35:17 Share Post by Email
In Reply to: Re: vacuum retard, ported vacuum question, RS [Profile/Gallery] , Tue, 2 Jun 2015 15:14:30
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I had a very rough idle on my SPG that took me weeks of head scratching to solve. As soon as I was just off idle the engine would smooth out. It turns out that I had the distributor vac capsule attached to full manifold vacuum. When you do this you are pulling a lot of advance at idle, and I'm guessing the same retard at high throttle/boost. So no performance advantage at all that I can imagine. Better to just crank up the boost at the APC if you want more transmission twisting and terrorizing power.

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