If I remember it restored the torque lost when they did the first tune. But in truth, I cannot remember the HP numbers.
Tony was inching HP and torque forward with multiple pulls but we did not print it out every time.

Sorry.

Keep in mind that when you add more fuel and air a second hot spark can help facilitate ignition.
Eurocharged may have some data on the plugs. They promote them so i imagine they have been asked to prove it.

franc