|Originally posted by AP2k:|
Anyone curious as to how this is performed, a wider gap makes the power output increase. More power output means the coil pack gets hotter and faster. It reaches a hurdle point where the coil has been heated beyond what it was made for and it simply dies.
I don't think you understand what's going on here. (And I
don't understand what you mean by, "... the coil pack gets ... faster.") You certainly went right past timgray
's critical point:
|Originally posted by timgray:|
... the plugs simply have an extra gap inside to make the spark gap wider which makes higher voltage which stresses the coil hard. [Emphasis added -- AMM]
) are probably correct when you say, "a wider gap makes the power output increase," because we expect the peak voltage to increase. But that generally doesn't matter, because a wider gap does not
increase the total spark energy delivered by the coil. (Power != Energy ... Power = Energy / Time)timgray
is correct that higher voltage
, resulting in high-voltage breakdown of the insulation inside the coil, is the primary culprit in coil failures when the spark gap is too wide.
[This message has been edited by Marvin McInnis (edited 06-06-2008).]