Ported Vacuum At Idle at Paul Jamison blog

Ported Vacuum At Idle. If you are not sure of this, put a vacuum gauge on the. With less than 15” hg. Vacuum should be at zero at idle on the ported side. Contrarily, the manifold vacuum affects the ignition timing. The difference between manifold and ported is with manifold as the source at idle the engine is getting the base setting plus the maximum the vacuum advance can supply,. With ported vacuum there is no vacuum on the vacuum advance at idle. Manifold vacuum, so those cans don’t work very well on a modified engine; For the best power, the ignition timing should be in as quickly as possible, both the mechanical and the vacuum. This article provides more information about ported and manifold vacuum ports, explaining how each port functions and its benefits. I could see where it could be. Ported vacuum pressure is low during idle and does not affect ignition timing. Ported vacuum is zero at idle, comes in just off idle, then goes away as the throttle is opened further. Depending on your elevation and condition of your motor you should be reading. At a rough idle, the stock can will “dither” in and out in response to the rapidly. Using a ported spark advance will still allow the vacuum advance to do its job at steady cruising, but all of the benefits of idle cooling will be lost.

This article provides more information about ported and manifold vacuum ports, explaining how each port functions and its benefits. Ported vacuum pressure is low during idle and does not affect ignition timing. I could see where it could be. The difference between manifold and ported is with manifold as the source at idle the engine is getting the base setting plus the maximum the vacuum advance can supply,. With ported vacuum there is no vacuum on the vacuum advance at idle. Contrarily, the manifold vacuum affects the ignition timing. For the best power, the ignition timing should be in as quickly as possible, both the mechanical and the vacuum. Using a ported spark advance will still allow the vacuum advance to do its job at steady cruising, but all of the benefits of idle cooling will be lost. Vacuum should be at zero at idle on the ported side. Manifold vacuum, so those cans don’t work very well on a modified engine;

Timing / Idle Mixture / Vacuum question

Ported Vacuum At Idle This article provides more information about ported and manifold vacuum ports, explaining how each port functions and its benefits. Using a ported spark advance will still allow the vacuum advance to do its job at steady cruising, but all of the benefits of idle cooling will be lost. At a rough idle, the stock can will “dither” in and out in response to the rapidly. Depending on your elevation and condition of your motor you should be reading. I could see where it could be. With ported vacuum there is no vacuum on the vacuum advance at idle. This article provides more information about ported and manifold vacuum ports, explaining how each port functions and its benefits. The difference between manifold and ported is with manifold as the source at idle the engine is getting the base setting plus the maximum the vacuum advance can supply,. If you are not sure of this, put a vacuum gauge on the. With less than 15” hg. For the best power, the ignition timing should be in as quickly as possible, both the mechanical and the vacuum. Vacuum should be at zero at idle on the ported side. Ported vacuum is zero at idle, comes in just off idle, then goes away as the throttle is opened further. Ported vacuum pressure is low during idle and does not affect ignition timing. Manifold vacuum, so those cans don’t work very well on a modified engine; Contrarily, the manifold vacuum affects the ignition timing.