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Engines 389 and larger can be set for 6 degrees BTDC. Remember to disconnect and plug the vacuum advance hose before setting the base timing.
You should be able to find that in any Chiltons manual. Read it through as you might have to disconnect the vacuum advance.
Use a timing light with vacuum advance disconnected set base timing to 6 degrees
The timing should be set to Top Dead Center (TDC), but you must disconnect the electronic spark advance feature. Unfortunately, I don't know how to disconnect the spark advance. The timing chain is all that can be set. There is no way to set the timing as the distributor is not adjustable.
SBC timing should be set at about 6-8 degrees advance with the vacuum disconnected at idle, about 600-800 rpm
yes, unhook the vaccum hose to the distribuetor to set the timing.
Ignition timing should be set to 6 deg BTDC, this is done with a timing light. Connect the power leads of you're timing light to the battery and put the pickup clamp over #1 plug wire. Disconnect the vacuum line on the vacuum advance and plug the line so it does not create a vacuum leak. Start the engine and shine the light on the crank pulley to see the timing mark. It should be pointed at 6 deg BTDC. See the attached links on how to install and check you're timing belt. Kyrasis6 Mazdatruckin.com
# Disconnect and plug the vacuum line that connects to the vacuum advance diaphragm on the distributor. # Loosen the locking bolt at the base of the distributor that allows it to turn freely, but don't turn it yet. # Connect a good quality timing light, the kind with an EXTERNAL power source, either plugs into the wall outlet or connects to the vehicle battery. # The engine has to be timed close enough to start which requires a little knowledge and experience. # Start the engine and point the timing light at the timing mark on the dampener pulley. # Turn the distributor (where you loosened it) until the timing mark aligns with the appropriate advance mark as specified in the manual. The advance may be slightly different for YOUR altitude. # Once the timing is where you want it, turn off the engine and tighten the distributor lock bolt, then restart the engine to make certain the timing is still right. # Disconnect the timing light and reconnect the vacuum advance line.
You will need a timing light with the timing advance option so you can adjust and monitor your changes. Vacuum advance limiters along with mechanical advance timing weights and spring kits are available from after market suppliers.
Disconnect any vacuum hoses from the distributor and plug them. Then you loosen the distributor hold down screws and turn it clockwise to advance the timing or counter clockwise to retard it. Tighten the hold downs, reconnect the vacuum lines and away you go.
No
AnswerMost of the time, the steps to take to set the timing are on the catalyst sticker under the hood. But first, you must get the vehicle into base timing (usually disconnect a wire from distributor). Remove distributor hold down bolt, hook up timing light to #1 spark plug wire, start engine, and align timing mark (0°) Once this is set, reconnect the wire you had to disconnect for base timing. Timing advance will automatically set itself. if it doesn't, you have a faulty timing advance mechanism on the distributor. You can check timing advance by pointing the timing light at scale (while hooked up to #1 spark plug wire) and rev the motor. Timing marks should move up the scale.On many GM cars and trucks the wire that you disconnect is solid gray in color, it is in the wiring harness on the firewall, the wire has a black plug for separating when doing the timing.