Thread: Will the Gspec/N1 WP pulley be enough?

So I prepping my car for nasa time trials. Right now, I'm sorting out the cooling system and getting it ready for sustained high-rpm use. Knowing that the water pump tends to cavitate at about 6500, I want to do the whole underdrive routine with the pulleys. Now, I'm not 100% sure I want to run a lightened crank pulley. That being said, will the Gspec (N1 replica) water pump pulley be enough on its own. I know the UR pulleys work in conjunction with the undersized crank pulley and oversized water pump pulley. From what I have read, the Gspec WP pulley is supposed to be even larger the the UR WP pulley, leading me to believe that it could work by itself (meaning keeping the crank pulley stock).

Any ideas? I need the engine reliable to the 7800rpm fuel cut.

Thanks in advance.