Plus from what I've been able to gleam, if your producing a spark at the proper time during the engine cycle, having a more powerful spark will only cause the spark to occur sooner and thus reduce power output.
"The 300ZX Turbo is a dance; it's a song; it's rolling, roaring automotive art. There is no color that doesn't suit it. There is no mood-lifting chemical substance it can't replace." - Automobile Magazine