AMS Build & AMS Modified: Dyno - 572.1RWHP / 590RWTQ / 21psi / Pump gas

If you mean power curve as in the torque, then yes. I've been giving this some thought and what I forgot to mention is that I also have a 2.25" venturi installed in the pipe about 6" prior to each muffler.
I'm not sure if that venturi had any effect on limiting my overall max HP or if it contributed towards my torque level being higher than other similar rwhp Zeds.

And so far it drives and performs quite impressively and predictably on the street.

 

jschrauwen congrats on your build and a sweet ride!

Earlier you mentioned a colder plug would have given you more power, but that's not necessarily true. Only if you're retarding the timing to avoid pre-ignition would that apply. From what I can tell these cars encounter detonation way before pre-ignition unless your running a power adder like NOS.

just my 2 cents, I'd hate for you to waste money on plugs and not see any benefits.

 

https://www.youtube.com/watch?v=HKZ2WFLU3qI