What is ignition timing? · Help Center - Summit Racing
Ignition timing (or spark timing) controls when the spark plug fires during the Compression Stroke. Ignition timing is measured in degrees of crankshaft rotation, before top dead center (BTDC). In a perfect world, The spark plug fires. The flame travels through the combustion chamber, igniting the air/fuel mixture.
Where should I set my ignition timing for the first start-up?
The Initial Timing is now set for 10 degrees BTDC. The engine should start right up! After Start-Up. Break in your camshaft. Flat Tappet Break-In Procedure; Roller Tappet Break-In Procedure; Adjust your ignition timing using the Total Timing Procedure.
What is total timing? · Help Center - Summit Racing
Set your Timing Light to your desired total timing. Start the engine. If you have Vacuum Advance, disconnect it. Rev the engine past the point where your mechanical advance is fully engaged. (Usually, 3,000 - 3,500 rpm will do it.) Watch the timing …
What is Engine Detonation? · Help Center - Summit Racing
Over-Advanced Ignition Timing If Ignition Timing is too far advanced, the spark plug fires too soon. This causes the flame to end early. The remaining fuel can detonate. Lean Air/Fuel Mixture A rich Air/Fuel Mixture runs cooler than a lean mixture. …
What is initial timing? · Help Center - Summit Racing
The term "Initial Timing" refers to the amount of Ignition Timing applied to the engine at idle. How is it set? Initial timing is set by the position the distributor is in when bolted down. For the proper procedure, follow this link to our article about Total Timing. What should I set it at?
What is a mechanical advance? · Help Center - Summit Racing
The mechanical (or centrifugal) advance is an Ignition Timing control mechanism built into most distributors. It is made up of: Two weights, An advance plate or cam attached to the trigger mechanism inside the distributor, and; Springs that control how fast the weights are flung outward. How does it work?
What does the gasoline octane rating mean? · Help Center
In this test, the fuel is preheated. Then, the engine is run at 900 rpm. Variable Ignition Timing further stresses the fuel's knock resistance. The results of the tests can also be combined. This is known as the Anti-Knock Index (AKI). AKI is the average of RON and MON. It …
Can I use a fuel injection kit to control ignition timing?
Ignition Timing Advance can be handled Mechanically and/or with Vacuum, just like with a carburetor. However, there are advantages to computer controlled timing. If you’re planning on nitrous or forced induction, Timing Control Compatible EFI is a must. What are the benefits? Fuel injection delivers fuel more precisely than a carburetor.
Which distributor gear should I buy? · Help Center - Summit Racing
The gear should be slightly softer than the camshaft. This will ensure accurate ignition timing and a long engine life. If the gear is too soft, it will quickly wear out. If the gear is too hard, it will wear the camshaft. Excessive wear will affect the ignition timing. …
What is the compression ratio? · Help Center - Summit Racing
Camshaft selection and Ignition Timing may need to be adjusted. Related Products: Cylinder Heads, Engine Assemblies, Pistons & Piston Rings Email Sign Up