I would say at low altitudes, you would be hard pressed to run out of engine with the 400,
High altitudes is where the 450 might be required and the option of the SC575 starts to shine.
Sent from my iPhone using Tapatalk
Printable View
I would say at low altitudes, you would be hard pressed to run out of engine with the 400,
High altitudes is where the 450 might be required and the option of the SC575 starts to shine.
Sent from my iPhone using Tapatalk
I haven’t counted people weight before. I have run 2100 lbs of additional ballast plus 4 people on the 450 and it runs 3700 or so rpm. And it’s starting to work hard. I suppose we were someplace around 7000 total weight.
One thing to note and consider—to make the primo surf wave, the boat has to be at 9.5 degrees nose high and 3-4 degrees list with 20 or less of center plate(preferably zero), and 50 or so of surf plate (40-50 seems ideal).
Depending on how you have that weight in the boat, what attitude/angles you’re running at, and how much center plate/surf plate you’re using , the load on the motor can vary drastically at the same loading.
In other words, I could probably put 8000# in a boat and get it to run “easy” if the weight and plates were arranged as such to allow that.
If you were able to get these results under ideal pitch/roll/plates for primo surfing, then you’re golden. But I still have no idea how the RPMS would not change in 2 mph? That’s wild.
Sent from my iPhone using Tapatalk
They didn't stay the same as it did flicker to 3500 a few times @ 12.5 but never stayed there where as @ 10.5 it stayed at 3400 the entire time. Due to the lack of precision of the RPM Gauge (showing increments of 100 vs 50) I assumed it to be 3450 but I guess it could have been 3499 the whole time.... There was no way to really tell unless there is another screen that shows it more precisely that i missed which is very possible.
I would consider 3400-3499 for all practical purposes “no change.”
Sent from my iPhone using Tapatalk
So when we did the "loaded" test we did use Flow 2.0 set to port side surfing. Then we did turn Autowake on with Flow 2.0 and I jumped in the nippy 55Deg water to give it a go and the boat did pump off a little ballast (less than 10% @ the bow & starboard side) to achieve Ideal pitch and roll. Me jumping out also took 230# out of the stern on the port side. With the speed set to 10.8 the boat was running 3400 RPM as well. Now I wasn't behind the wheel so I am not sure if it was bouncing to 35 or 33 at any point in the runs but my buddy said everything he saw was 3400.
I do understand and completely agree with your point that a boat can be manipulated to run "easier" due to ballast placement moving the CG. I was doing my best to put the weight (my friends) in place so that the boat would retain as much ballast as possible and still achieve the right angles.
Don't forget you can reprop too, your demo may have had the standard prop or the upgraded prop. I only surf so I don't care about top end.
His motor is actually turning at very very low rpm given the situation. His prop is potentially too good....[emoji1743]*[emoji3603]
Sent from my iPhone using Tapatalk