Spark latency correction

[flying.chimp at juno.com]

Ward,
Thanks, never too much info.
Wayne

On Sat, 18 Sep 1999 16:17:50 PDT "Ward" <wspoonemore at excite.com> writes:
>"Spark latency" is a compensation for the delay from the time the 
>spark
>delay timer is loaded with the spark advance value untill spark 
>actualy
>ocours. This includes inductive delay in the ignition coil. 
>
>Please remember that spark advance is actuall dely, since yiu cant 
>time
>travel backwards to start spark, its actualy delay from the prior TDC 
>event.
>to calulate a V8 time between TDC's do 15/RPM, 
>
>Example:
>15/3000 rpm = 0.005 seconds, (5000 usec)
>S0 5000/360 = 13.8 usec/degree.
>
>If you work this out for different RPM values, and plot the usec.deg 
>value,
>you will get an interesting curve. 
>
>This may be a problem with low cost timing lights, most of which are 
>not
>accurated byond idle RPM, the pro models do comensate for RPM and 
>lamp
>delay.
>
>Bet that was more thna you wanted to know?
>Ward

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