Blown 1500,
cam part #54899. 578 in/ 595ex 114 lobe seperation 232 in/242ex at .050 lift. Engine was a HP500 carb.Put Dart 310 cc heads bowl ported , exhaust ported, chambers opened up to 127cc. B&M 420. Cam is ground 4 deg. advanced. Grind #RRB1-232-242-A. Total timing 30 deg. No innercooler.
Thank You

Are the Crane hydraulic roller cams manufactured with smooth, easy going ramp speeds so that they are EASY on lifters and the entire valve train???

Right now I have Crower hydraulic roller cams and they have very easy, slow ramp speeds to help the valve train live. These cams are very simular in comparison to the Crane 741 as far as duration @.050" go. (236*/244* on 114* lobes) advertised duration is: 300*/307*

Actually, I prefer the slower ramp speed cams to help the valve train live longer and I am willing to sacrifice a few HP in order to do that, but was wondering how Crane's ramp speeds compare to a Crower.

Liquid Kroozer, the 741 will wake up your motor. A custom grind even more.
Kaama, the Crane and most other manufactureres have easy enough valve action that you shouldn't have any problems with cams in the ranges we run in these boats. The Crower you have is almost the same as the 741 Crane. Check the duration numbers at .100" lifter rise. If they are close, the cams are almost the same. If one is noticably longer, it has more aggresive valve action.

Blown 1500,
I am interested in a recomendation/purchase . I have a Gen 6 and would want to stick with hydraulic roller and how much if any idle quality would I sacrifice as my wife also drives the boat.
Thank You

Liquid Kroozer, I need more info. The same cam profiles are used for the IV,V, and VI. Is the motor FI? What prop, boat weight, fuel................pm a number and I'll call you.