I'd like to get some feedback on a Lunati Solid Roller grind, part number 40230733/60333: 249/255 @ .050, LSA:110, Lift: .585/.600.

Engine Specs: 4.15 stroke RB engine, 4.375 bore, Diamond dish pistons at 10.3 CR, .039 quench, 440EZ MW ported by Hughes with Comp 1.5 rockers, Indy single plane EFI with 90mm TB with Edelbock Elbow, Holley HP EFI with knock sensors, 34* total timing. Using Hi-Tek 1.75" header/manifold, but a custom set of Hi-Tek 2.25" have been ordered and are on their way. Using closed loop cooling, 180* t-stat, CP oil cooler.

I have this mill in a 24ft jet boat, built for the large whitewater in Hells Canyon on the Snake River, formerly powering a Hamilton HJ212 water jet. When building the engine, I had originally considered the Lunati 60333 cam, however on advise of Hamilton, they suggested that the motor be toned down to keep the pump from being overpowered and blowing out (severe cavitation), which the Hamilton was only rated at 350hp. What I ended up with is a Hughes solid roller, 235/241, LSA: 110, Lift: .535/.545. However even with the little mild cam, the Hamilton was still over powered and required a delicate hand on the throttle to avoid blowing out. Out of frustration, I ended up swapping the Hamilton pump for a Scott Jet 912, which is a very capable two stage pump rated up to 1200hp. Now that the pump is up to par, I am considering going back to my original plan and swap to the Lunati 60333, to give a few extra ftlbs in the 4500-5000 rpm. Currently with the mild cam, the Scott loads the engine out at 4500 rpm, which equates to 494hp/577ft lbs. I'd like to bump it to the 630-640 ft lbs to get the WOT revs up around 4800 +/-, like some of the dyno numbers I seen posted with that cam. The motor cruises the boat at 3300 rpm, and low end torque is not a concern since the jet can't utilize it anyway in the lower revs. I am also considering using a lower rate valve spring (200/500) on advice of Lunati, to keep the stresses off the Morel roller lifters, and since the motor will unlikely see anything over 5000 rpm with the new pump; EFI rev limiter set at 6500.

The feedback I'd like to get about the cam is idle quality, tunability with EFI, and longevity (again, using lighter 74620K1 springs). I have this motor's idle set at 900 rpm, with 13" of vacuum...keep in mind this is while turning the jet, which is directly coupled to the engine. I would consider the idle very tame, and would have no problem stepping it up, but I wouldn't want it too raunchy and make it cantankerous. Thanks