What should rpms run while surfing

[Langwell]

I bent my prop and just replaced it with the acme 2419 on a z3. I was wondering where my rpms should be hanging around , both cruising and surfing

[UNSTUCK]

Need to know what your drivetrain specs are, how much ballast your run while surfing, your lakes elevation, how many people in the boat.

[Germaine Marine]

Only one ratio in a Z3, aside from the 575 should all be roughy the same at surf speed given the motors are building roughly the same torque at that speed. Heavily ballasted you should be 3500-3900 at surf speed. Cruise speed will vary, at 27-28 you should be in the 4s if my mind serves me right.

[bsreid]

Rzx with that prop and tranny I’m right at 4000 or just under for surfing,

[cnote]

at 1000' amsl, 2419 prop, '18 R23, raptor 400, full rear ballast bags, 900# lead in rear (even), and 60/40 in front bags, 3 ppl ~500#, goofy wave, 11.4, taps 4/4 i think, and we were running right around 3200rpm

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[cnote]

at 1000' amsl, 2419 prop, '18 R23, raptor 400, full rear ballast bags, 900# lead in rear (even), and 60/40 in front bags, 3 ppl ~500#, goofy wave, 11.4, taps 4/4 i think, and we were running right around 3200rpm

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and cruising (~28), no ballast, same ppl, right around 4100-4200. but i wasn't paying as close attention but will this weekend and report back. I'm really impressed with the setup on this boatfor surf efficiency, for me one of the selling points. I think we used just over 15 gal of 90 octane for about 2-3 hours of surfing with a little cruise mixed in.

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[Langwell]

Thank you guys as always, I will keep a much closer tab on it over the next few weeks and report in.

[cnote]

@Langwell: updated numbers from this weekend w/ the 2419 on my '18 R23, raptor 400. Surfing was ~3100rpm with 700# people, 500# lead all in back, rear bags full, forward bags 50/50. 11mph, 4/3 surf/taps. Cruising ~4000 RPM 28mph, no water ballast, 700# ppl and 500# lead in the back. WOT 39mph @ 5400rpm (just me in the boat, with the lead). Hope that helps.

[duffymahoney]

Lower the better for wash and a clean wave. I think I turn 2100 at 12.75-13.25 mph and heavily ballasted.