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Premium Member
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60 Posts
Discussion Starter #1
I know there are numerous threads about ported and manifold vacuum,my quadrajet has no ported vac.
I believe this model quadrajet in 1970 ram air 3 came without.
I have full manifold vac advance.My question is should base timing still be set with vac plugged?
Because at idle and around 950 rpm with manifold connected it is much higher than base timing as it should be.
Thanks
RH
 

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Premium Member
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60 Posts
Discussion Starter #3
Thanks,so timing at idle With with manifold vacuum connected should show higher
 

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Super Moderator
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5,865 Posts
Always set timing with vacuum canister disconnected. Always. Doesn't matter if you normally use a ported source or not.
 
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