Originally posted by mikey boy:
Originally posted by DemonSVT:

1 coil for each cylinder. Thus eliminating the rpm factor in coil runoff.

That stands out as a serious improvement.






is what your talking about "coil on plug?" are there any drawbacks to the coil on plug setup?



Coil on plug call for one coil for each spark plug instead of one coil for two spark plugs so it is more expensive.

Coil on plug eliminates the need for plug wires and so may have an advantage.

The big advantage to coil on plug is that the ignition timing can be controlled for each individual cylinder. It is a critical component for run safe strategy that can keep an engine from overheating even when there is a coolant loss.

Coil over plug also eliminates the need for dual platinum spark plugs. Single platinum will wear just as long since the only tip that really must have the platinum tip is the tip that the spark jumps from. On waste fire ignition systems, half of the cylinders fire with reverse polarity, with the spark jumping from the side wire to the center electrode, just the oposite of conventional ignition systems.

Jim Johnson 98 SVT 03 Escape Limited