The Stovebolt Site Forums The Shop Area Engine Shop Enerpulse's Pulstar® PlasmaCore Plugs Provide Bigger Spark, More Power

Run a dyno test on an engine with old plugs (and probably poorly tuned as a consequence).

Change the plugs with any plugs.
Tune the engine.

Run a dyno test.

What results do you expect?

Look at the controlled test at the links posted above.

Those plugs provided only a modest increase in power and mpg. The payback might have been OK (not substantial, but OK) if you drive your vehicle a lot.