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What is a mechanical advance? · Help Center - Summit Racing Most mechanical advance distributors provide 20 - 25 degrees of advance Most race engines use ONLY mechanical advance or a "locked out" distributor If an engine is mostly run at wide open throttle, the total timing can be set and no advance is needed At wide open throttle, Engine Vacuum is low A Vacuum Advance would not do any good
What is a vacuum advance? · Help Center - Summit Racing This improves throttle response and makes the engine more efficient It also helps the engine run cooler The vacuum advance provides this benefit BEFORE the Mechanical Advance provides Total Timing Vacuum advance distributors are best for street vehicles The vacuum advance feature has NO EFFECT on full-throttle power
What is total timing? · Help Center - Summit Racing Total Timing = Initial Timing + Mechanical Advance How is it set? Determine your desired total timing (See below for basic guidelines ) 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
What is ignition timing? · Help Center - Summit Racing So, the spark needs to fire at different times, to create maximum pressure at the right time The solution is to advance or retard the timing Ignition Advance Advancing the timing means the plug fires earlier in the compression stroke (farther from TDC) Advance is required because the air fuel mixture does not burn instantly
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 should I buy? · Help Center - Summit Racing Advance Types Most distributors also control the Ignition Timing It does this by 1 of 2 methods, or a combination of both Follow the links below to learn more about the timing control mechanisms What is a mechanical advance? What is a vacuum advance? Other Factors The distributor gear needs to work with your camshaft
How is Electronic Fuel Injection (EFI) Controlled? · Help Center The ECT sensor is usually located near the thermostat It tells the ECU when the engine is warm A cold engine requires more fuel and a higher idle for easy starting When it warms up, the ECU can turn on the cooling fan or advance the Ignition Timing Knock Sensor Knock sensors are located on the engine block
Category · Help Center - Summit Racing What is a mechanical advance? Definition Description 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 cont Distributor Trigger Style - Optical
Category · Help Center - Summit Racing Common Camshaft Failures and Causes The camshaft itself is rarely to blame when it fails What most people claim as camshaft failure is usually 1 of 4 things: Excessive wear, Mechanical interference, Broken pieces, or A cracked camshaft Exc What is the difference between brake fluids? DOT 3 vs DOT 4 vs DOT 5 vs DOT 5 1