by White Whale Wed Aug 01, 2012 5:00 pmI have an Edelbrock carb on my 315 and there are two vacuum lines that come off of it, one is a ported vacuum, advance that is supposed to go to the distributer and the other is a manifold vacuum. I have an electronic distributer so i don't think i need the ported vacuum but do i need the manifold ? or just plug them both up ?
3 posters
Carb Questions
White Whale- Number of posts : 19
Location : California
Registration date : 2012-06-22
Twinpilot001- Number of posts : 6186
Location : spokane ,Wa.
Registration date : 2009-09-28
[i]yes
White Whale- Number of posts : 19
Location : California
Registration date : 2012-06-22
Cool i'll just plug them both up, thanks
RodStRace- Number of posts : 3046
Location : Chino Valley
Registration date : 2010-01-21
White Whale wrote:I have an Edelbrock carb on my 315 and there are two vacuum lines that come off of it, one is a ported vacuum, advance that is supposed to go to the distributer and the other is a manifold vacuum. I have an electronic distributer so i don't think i need the ported vacuum but do i need the manifold ? or just plug them both up ?
315=318?
Vacuum advance is good for mileage. The dist. should be "curved" for the vehicle and include advance. Mechanical advance changes advance for RPM, vacuum changes it for load.
In most cases, it should be connected to ported vacuum. In some HP and other non-stock applicatons where idle timing needs help, manifold vacuum is used.
You can plug off the manifold vacuum if you don't have a need for it, or connect it to a vacuum gauge. They are sometimes labelled MPG or economy gauges too. A useful gauge for monitoring engine health and how you are driving.
White Whale- Number of posts : 19
Location : California
Registration date : 2012-06-22
318 sorry
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