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How to Set the Ignition Timing on a 1980 Corvette

You can maximize the power and fuel efficiency of your 1980 Chevrolet Corvette by adjusting the ignition timing to the proper setting. The ignition timing determines when a spark will ignite in the Corvettes internal combustion engine. The ignition timing for the 1980 Chevrolet Corvette should be set to 12 degrees for automatic and manual transmission models, but the ignition timing is set at a different idle speed for each transmission. The 12-degree ignition timing is used on the 5.7-liter V-8 engine. Be careful not to interfere with other moving parts on the engine when you set the ignition timing.

Instructions

How to Set the Ignition Timing on a 1980 Chevrolet Corvette

1

Insert the key into the ignition of your Corvette and start the engine. Turn off all accessories, including the radio and air conditioning/heat.

2

Shift the transmission into "Neutral" and set the emergency brake. Bring the engine to an idle speed of 700 rpm if your car has an automatic transmission or 800 rpm if your car has a manual transmission.

3

Open the hood and connect the timing light and/or tachometer to the Corvettes battery, the No. 1 spark plug and the main crank pulley.

4

Observe where the timing mark on the pulley falls -- the correct timing is 12 degrees.

5

Loosen the distributor lockdown bolt with your wrench. The lockdown bolt is located by the base of the distributor housing.

6

Disconnect the vacuum hose that is connected to the distributor housing. There are numerous hoses connected to and around your engine but you should only remove the hose connected to the distributor. This will allow you to set the ignition timing.

7

Rotate the distributor with your hand until the timing mark drifts to 12 degrees.

8

Tighten the distributor lockdown bolt with your wrench once you have set the timing to 12 BTDC. Reconnect the vacuum hose you removed earlier from the distributor housing. Remove the timing light and/or tachometer.

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