Ported Vacuum Advance Vs Manifold at Paul Craig blog

Ported Vacuum Advance Vs Manifold. As the pedal is pushed, the vacuum increases. when you accelerate, the mixture is instantly enriched (by the accelerator pump, power valve, etc.), burns faster, doesn't need the additional spark advance,. this unit is there to force exhaust gasses when the engine is cold to travel through the crossover passage under the intake to increase fuel. use manifold vacuum to set ideal advance for idle and cruise, then set the mechanical curve for wot. 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. the debate centers around whether straight manifold vacuum is better (or worse) to connect to the vacuum. At part throttle, high manifold vacuum moves the diaphragm in the vacuum advance canister on the distributor to add more timing. this is how vacuum advance works. But at wot, the vacuum drops to near zero and vacuum advance is removed and the total timing then is established by the initial plus the mechanical advance.

the debate centers around whether straight manifold vacuum is better (or worse) to connect to the vacuum. As the pedal is pushed, the vacuum increases. At part throttle, high manifold vacuum moves the diaphragm in the vacuum advance canister on the distributor to add more timing. this is how vacuum advance works. when you accelerate, the mixture is instantly enriched (by the accelerator pump, power valve, etc.), burns faster, doesn't need the additional spark advance,. 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. this unit is there to force exhaust gasses when the engine is cold to travel through the crossover passage under the intake to increase fuel. use manifold vacuum to set ideal advance for idle and cruise, then set the mechanical curve for wot. But at wot, the vacuum drops to near zero and vacuum advance is removed and the total timing then is established by the initial plus the mechanical advance.

Ported Vs Manifold Vacuum Distributor at Martha Hazelwood blog

Ported Vacuum Advance Vs Manifold this unit is there to force exhaust gasses when the engine is cold to travel through the crossover passage under the intake to increase fuel. use manifold vacuum to set ideal advance for idle and cruise, then set the mechanical curve for wot. the debate centers around whether straight manifold vacuum is better (or worse) to connect to the vacuum. But at wot, the vacuum drops to near zero and vacuum advance is removed and the total timing then is established by the initial plus the mechanical advance. 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. when you accelerate, the mixture is instantly enriched (by the accelerator pump, power valve, etc.), burns faster, doesn't need the additional spark advance,. As the pedal is pushed, the vacuum increases. At part throttle, high manifold vacuum moves the diaphragm in the vacuum advance canister on the distributor to add more timing. this unit is there to force exhaust gasses when the engine is cold to travel through the crossover passage under the intake to increase fuel. this is how vacuum advance works.