I recently acquired a 2007 Nitro 591 with a 150efi. Total of 75 hours on boat and motor. Motor was checked and everything is firing like it should. It came with a Tempest 21p. It had a hard time getting on plane but when it did it would run like a scalded ape. I had the largest PVS plugs in the prop but it just wasn't spinning up fast enough to get on plane and would hold only 4800-5000 RPMs at WOT. I tried a 13.5" Laser 2 24p that a friend of had laying around. The laser spun up great, but would cavitate at about 5000 RPMs when getting on plane. I would say that despite the cavitation the hole shot was improved over the Tempest due to the RPMs. Once on plane WOT was about 5600 - 5800 RPMs but top speed was only about 54 mph vs 63 with the Tempest. Trying to figure out what type of prop I need. I'm thinking something like the trophy plus since it's smaller than the Tempest, but with the PVS plugs I can adjust how much the water is aerated around the prop to control cavitation.
4800 - 5000 RPMs WOT
5600-5800 RPMs WOT
Cross her eyes, and dot her T's