Yellow_ICC_OK

Brett,

Got the results on the bravo one 30/4 blade you sent last week. Pretty much as expected, not as much top end as I thought. Maybe just a touch too much pitch, but close.

Old Mach 27....5400 rpm max = 81 mph
New bravo 30....4900 rpm max = 83 mph

Cruise at 3000 rpm= 52 mph, supercruise 4000 rpm = 69!

Wow, got a much more efficient boat here, with gas at $4.

Midrange is still strong, boat accelerates hard to 70-73. The only thing i noticed is, noticeably more chine walk at top end? Can a prop cause this? Should we try a 5 blade hydro or something?

Thanks,

Mike
Tulsa

bbladesprops

Yes we can try a 5 blade propeller.

Also, we can talk about a adjustment to the B1.

offthefront

iTrader: (1)

Thats a big jump from the 27 Mach to the 30 B1 ? Is the Mach 3 blade ? I bet if Brett "tunes" the 30 and gets the RPM back you'll get the results your looking for

Yellow_ICC_OK

It is a pretty big jump, but the boat really needed it. Brett, I think the boat needs a 28.5 to be about perfect. The 30 kicks azz but i'm afraid that if i have a full boat it will be a little doggy. Can you take that 30 and "lab" it or something to get me another 150-200 rpm? Bow lift was good, so good in fact that might be causing my chine walk..

I will send the prop back to ya, and if you can send me a 5 blade hydro to try (or whatever you recommend) that would be similar, and that doesn't work, you could go ahead and work the 30 over, right?

THANKS,

MIKE

Griff

With your 525SC, I would prop it to run a solid 5200rpms. I had mine dialed in to run just shy of the 5350 rev limiter with just me, light fuel and 70* air temps. It would run about 5200rpms then with 4 peeps and 80 gallons of fuel.

Also, fuel consumption goes up quite a bit when the secondaries open around 3800-4000rpms.