Ported Vs Manifold Vacuum Distributor. Finding which line is the manifold vacuum is easy. Normally, distributor vacuum for manifold vacuum will be attached to the port shown in your photo above with the hose on it at the far right in the photo. Unplug one of the lines from the distributor if has vacuum at idle it is manifold. Full vac does seem to help more with engine cooling, as timing is advanced at idle, whereas it isn't with ported vac. As you come off idle and accelerate normally, vacuum will rise, ported or manifold and the distributor will act the same either way. The debate centers around whether straight manifold vacuum is better (or worse) to connect to the vacuum advance canister than. A ported vacuum usually means zero or no vacuum at idle and increases as the vehicle moves or as the throttle opens. As a car enthusiast, i understand how choosing the right vacuum source for your distributor can significantly impact engine. There's been a lot of debate whether or not the vacuum canister should be plugged into a ported or direct vacuum source.
from www.corvetteforum.com
There's been a lot of debate whether or not the vacuum canister should be plugged into a ported or direct vacuum source. Full vac does seem to help more with engine cooling, as timing is advanced at idle, whereas it isn't with ported vac. As you come off idle and accelerate normally, vacuum will rise, ported or manifold and the distributor will act the same either way. Unplug one of the lines from the distributor if has vacuum at idle it is manifold. Finding which line is the manifold vacuum is easy. Normally, distributor vacuum for manifold vacuum will be attached to the port shown in your photo above with the hose on it at the far right in the photo. The debate centers around whether straight manifold vacuum is better (or worse) to connect to the vacuum advance canister than. A ported vacuum usually means zero or no vacuum at idle and increases as the vehicle moves or as the throttle opens. As a car enthusiast, i understand how choosing the right vacuum source for your distributor can significantly impact engine.
Factory Ported Vacuum Advance CorvetteForum Chevrolet Corvette
Ported Vs Manifold Vacuum Distributor The debate centers around whether straight manifold vacuum is better (or worse) to connect to the vacuum advance canister than. As you come off idle and accelerate normally, vacuum will rise, ported or manifold and the distributor will act the same either way. Normally, distributor vacuum for manifold vacuum will be attached to the port shown in your photo above with the hose on it at the far right in the photo. Unplug one of the lines from the distributor if has vacuum at idle it is manifold. Full vac does seem to help more with engine cooling, as timing is advanced at idle, whereas it isn't with ported vac. There's been a lot of debate whether or not the vacuum canister should be plugged into a ported or direct vacuum source. As a car enthusiast, i understand how choosing the right vacuum source for your distributor can significantly impact engine. Finding which line is the manifold vacuum is easy. A ported vacuum usually means zero or no vacuum at idle and increases as the vehicle moves or as the throttle opens. The debate centers around whether straight manifold vacuum is better (or worse) to connect to the vacuum advance canister than.
