Where do i hook up my vacuum advance

How do you set the vacuum advance?

You want to plug the line to the vacuum advance when setting the timing. After setting the timing, hook the vacuum line back up and adjust your idle speed if necessary. When checking you mechanical (centrifugal) advance, the vacuum line must be plugged as well. Man.

How does vacuum advance work?

This is how vacuum advance works. At part throttle, high manifold vacuum moves the diaphragm in the vacuum advance canister on the distributor to add more timing. 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.

Should I plug my vacuum advance into a direct source?

Plugging your vacuum advance into a direct source will allow it to engage at idle, which is good for a number of reasons. Much like cruise conditions, engines run leaner at idle than they do under load. Again, this means the mixture burns slower and needs an earlier spark to optimize the burn.

Does vacuum advance produce advance at idle?

I know that hooking up the vacuum advance to manifold vacuum will produce advance whenever there is a vacuum in the manifold, such as at idle, cruise, and light throttle, and will produce no vacuum at WOT.

How do you adjust the timing on a vacuum advance?

How to Adjust Vacuum Advance Timing. 1 Step 1. Set the mechanical timing of the engine. Disconnect and plug the vacuum advance hose at the distributor and plug the hose. Connect the timing ... 2 Step 2. 3 Step 3. 4 Step 4. 5 Step 5. More items

How far apart should the mechanical advance and vacuum advance be set?

Repeat steps 8 and 9 until the total difference between the mechanical advance and vacuum advance readings is approximately 10 degrees apart. The vacuum advance is now set for 10 degrees of advance at normal highway operating conditions. Remove the vacuum pump and timing light.

How to use a distributor vacuum advance on a car?

Connect the vacuum pump to the distributor vacuum advance using a gauge. Start the engine and instruct your aide to crank it up to 2,000 rpm. Step 5: Increase the vacuum to the reading obtained during the driving test. Using the timing light, examine the timing mark on the harmonic balancer. Take note of the overall advance shown on the scale.

How does vacuum advance work?

This is how vacuum advance works. At part throttle, high manifold vacuum moves the diaphragm in the vacuum advance canister on the distributor to add more timing. 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.

Can you run too much vacuum advance at idle?

One problem with running too much vacuum advance (hes talking 24 degs in the vacuum can) at idle is when you hit your total mechanical advance at cruise it will be 62 degs btdc (38 degs total without vacuum as stated). Its one thing to run 20+ degrees initial with say 10 or so degs vacuum for a total of 30 - 32 degs initial and 36 total at WOT.

When do you add vacuum advance to a ported advance?

With ported advance, vacuum is applied once the throttle is opened past curb idle. Some tuners prefer to add vacuum advance at curb idle on engines with big camshafts to improve idle quality. If you choose to do this, be sure to remove the vacuum advance line from the vacuum source before checking initial timing.

How many degrees of advance at idle?

If you hook your vacuum advance up to a manifold source then you will have 22 degrees total advance at idle and some portion thereof at cruising speed depending on engine load. If you hook your advance up to a ported source you will have 12 degrees at idle and 22 degrees when there is sufficient ported vacuum to give you all of your advance.

How does vacuum advance work?

This is how vacuum advance works. At part throttle, high manifold vacuum moves the diaphragm in the vacuum advance canister on the distributor to add more timing. 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.