What is the timing curve?

A timing curve is the rate at which timing advances with engine rpm. For any given engine rpm, there is an optimum timing setting that provides maximum power. Most people set ignition timing by advancing the distributor until the engine pings under load, then backing off a few degrees.

How does a time current curve ( TCC ) work?

A Time Current Curve (TCC) is a graphical representation of the operating characteristics of overcurrent protection devices at different magnitudes of fault currents. A TCC is a two-dimension plot with the current at the x-axis and the time at the y-axis with both axes are in logarithmic scale. The current axis may be expressed in amperes …

How to set your timing for peak rpm?

Start the engine. It may kick back a little due to the advance coming in immediately without the springs. If you™re using an adjustable timing light, set the light to 36 degrees advanced. Now rev the engine just a little while observing the timing marks with the light. It shouldn™t take much rpm to peg out the advance without the springs installed.

What’s the best way to set your timing?

It shouldn™t take much rpm to peg out the advance without the springs installed. With an adjustable light set at 36 degrees, align the stock timing marks with ﬁ0ﬂ when the timing is ﬁpegged out.ﬂ With the non-adjustable light, align your new 36-degree mark with ﬁ0.ﬂ Rev the engine a little to make sure the timing will not advance any further.

What should the timing be on a small block Chevy?

When in doubt, total timing should be somewhere between 34 and 36 degrees. A typical small-block Chevy’s timing curve needs to be set somewhere in this range for maximum performance, when the engine is being revved at 3500 RPM. At this point, the timing should stop advancing and should remain steady.

Which is correct timing curve for distributor machine?

If you send your the correct curve on a distributor machine. We usually install a 26° timing curve when used with 12° initial timing set at engine idle. This, however, is not perfect or optimum for any one combination. to slow down the “curve.” Where as a low compression, low stall speed real pain in the ass to drive and tune.

How is the advance curve of an engine determined?

If advance is measured at small increments of engine rpm, the timing figures created by the weights and springs as they move outward during engine acceleration will define the advance curve when plotted on a graph. Factory advance curves are engineered to provide acceptable performance and emissions control.

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