Some time ago I built an ignition booster for gasoline engine which gives very big sparks. It uses simple components and performs better than “Crane-Cams” or “MSD”. I think this kind of booster is very promising in drag racing scene.
Here is the normal sparks from ignition coil:
Here is the beginning of sparks with ignition booster on:
Here is the big ball of plasma:
This is the installation on my car:
And here is the result of ca. 300 km driving with booster on:
Compare to a new spark plug: