Craig, do you know the required dwell time for coils on plug?


Paul Lamar


No, not off the top of my head. It gets longer with higher RPM. But here are some links to information.
http://www.picoauto.com/tutorials/ignition-primary.html
http://www.msdignition.com/forum/showthread.php?t=5569
http://www.iceignition.com/ignition-theory
http://www.msdignition.com/forum/archive/index.php?t-9702.html
http://en.wikipedia.org/wiki/Ignition_system


That first one is a good web site. However specific info on Ford coil on plug.

Paul Lamar

Do you have a particular model, engine or a part number? I need that to search for specific info.
C. Smith


No but they are all pretty much the same.
2 ms dwell time is a huge error in timing at 7500 RPM.

125 CPS or (Hertz in Europe :))
Or one rev in .008 seconds. 8 mS.
360 degrees in 8 mS is 45 degrees per mS.
That is a huge timing error.  Therefor the actual error depends
on RPM. Thats why it takes a computer
to fix it.


Paul Lamar

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