Now that CC has had their hands on Centurion for 5 years...

[tdc_worm]

...they are missing an opportunity to adopt whatever it is that Centurion is doing to reduce engine noise. I have had the good fortune of demo'ing all of the top players in the market over the past 2 weeks. Centurion RI237 was by far the quietest (almost electric), and the the 2021 G25 (paragon hull) was by far the loudest in terms of engine noise. More engine noise/drone requires more stereo volume and, at the end of the day, results in way more overall sound pollution and fatigue to the people on the boat.

It is so significant that Centurion even touts it as feature on their website:

https://www.centurionboats.com/why-centurion/quiet-ride

***this is not a shot at CC...just hoping they lurk on these forums. I will be in the market to upgrade my 230 in the next couple of years and quieter will be more awesomerer.

[Gtsum2]

I’d sure like to see CC up the quality of the interior on centurions. I was surprised how far behind nautique they are in fit and finish and just the overall feel of quality on the inside (when we looked at them a month ago and ended up with our g23). They are quiet though


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[jjackkrash]

When I bought my 200 with the H5 in '16, it was the quietest ski boat I had ever been in. I don't know why the wakeboats would be particularly loud. Interesting.

[Kenv]

Sooo...in a nutshell....if both boats ran a PCM 450....what would it take Nautique to quiet it down to Centurion's level?? Minimal changes? Thicker fiberglass around the engine? Thoughts?....I could go for a little quieter ride in my Nautique at cruising speeds.

[tdc_worm]

Sooo...in a nutshell....if both boats ran a PCM 450....what would it take Nautique to quiet it down to Centurion's level?? Minimal changes? Thicker fiberglass around the engine? Thoughts?....I could go for a little quieter ride in my Nautique at cruising speeds.

that's the million dollar question. who knows if it is the process, the materials, the design, or all three? either way, Centurion is the only one advertising it as a feature, so they know they are on to something. Quote from their website (i discovered this AFTER the demo):

"Centurion Boats are no noisier than your average dishwasher. That’s quiet — as low as 86.5 decibels in the driver’s seat when pulling a wakesurfer running at 3500 rpm. The hush factor was achieved through the strength of unibody vacuum infused construction, combined with the available Patented Silent Stinger Wake Plate Exhaust System and the efficient power of GM Marine by PCM. Unibody construction chemically fuses the points where hull, stringer system, and deck converge, eliminating water noise and engine vibration."

On this Silent Stinger Wake Plate....it looks like they are using the main trim tab to diffuse the exhaust noise. Is it measurably different than an FAE? Could be?

[Kmayotte]

...they are missing an opportunity to adopt whatever it is that Centurion is doing to reduce engine noise. I have had the good fortune of demo'ing all of the top players in the market over the past 2 weeks. Centurion RI237 was by far the quietest (almost electric), and the the 2021 G25 (paragon hull) was by far the loudest in terms of engine noise. More engine noise/drone requires more stereo volume and, at the end of the day, results in way more overall sound pollution and fatigue to the people on the boat.

It is so significant that Centurion even touts it as feature on their website:

https://www.centurionboats.com/why-centurion/quiet-ride

***this is not a shot at CC...just hoping they lurk on these forums. I will be in the market to upgrade my 230 in the next couple of years and quieter will be more awesomerer.

Couldn't agree more! Though I've never been in a Centurion the cabin noise in the G is our biggest complaint. Maybe since the towers are higher after 2016 it's not as bad. I'm sure the low Bimini traps noise and it bounces around.

I can say that our stereo is inaudible at cruising speed without cranking it. Our stereo is lower tier but with a sub, two amps and two tower speakers it should be much better than it is. My friend has the upgraded stereo package with wave front and you can actually here it when driving without cranking it! It's a big upgrade.

But if they could quiet down the cabin noise would be nice not to have to make sure I have wavefront on the next boat.

[greggmck]

Perhaps its because the engine is surrounded by large bags of water since the boat lacks sufficient subfloor ballast to make it's wave. Noise is muffled by the bags. There are obvious trade offs to this "feature".

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[vision]

Perhaps its because the engine is surrounded by large bags of water since the boat lacks sufficient subfloor ballast to make it's wave. Noise is muffled by the bags. There are obvious trade offs to this "feature".

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Good thought, but no.

I spend time both a G23 and Ri237 with the exact same PCM motor. No ballast or full ballast, Ri237 is way quieter.

Even the transmission noise, which I notice the most in the G, is not as prominent in the Ri or Fi.


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[greggmck]

I have driven Centurion Ri237s, Ri257s, Fi23 and Fi25s. Probably 50 plus hours in dozens of these boats in competition and in training in the past two years alone, each time in brand new factory boats. I have not noticed them being quieter in any way.

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[tdc_worm]

Perhaps its because the engine is surrounded by large bags of water since the boat lacks sufficient subfloor ballast to make it's wave. Noise is muffled by the bags. There are obvious trade offs to this "feature".

as long as we are in the spirit of making assumptions, one could assume that brand loyalists see things through rose colored glasses or that obedient brand ambassadors are incentivized to plant seeds of doubt and never miss an opportunity to denigrate the competition. but i'd rather stick to fact rather than fiction.

G25s dry weight is 6400lbs + sub floor 2200lbs ballast = 8600lbs
Ri237s dry weight is 5450lbs + sub floor 2850lbs ballast = 8300lbs (without PnP)
They both share the same 102" beam, but the longer boat will have longer wetted surface.

Using Archimedes principle we know that the volume of water displaced is equivalent to the mass of the boat. The G25's extra 1'5" in length likely makes its extra 300lbs of mass negligible because of its increased wetted surface. That is to say that it any difference in displacement is a rounding error. There are only so many ways you can drag a hole (or a hull, if you prefer puns) through the water. I've surfed both, and both were incredibly similar.....except for that PnP thing you mentioned. I have my preference, but this post isnt about d!ck measuring over wave size.

So, to put everyone at ease, here is how we surfed each:

G25 (paragon hull) - 3 adults on board (540lbs?), full ballast, 1400lbs of lead (400 each port and starboard stern, 400 port midship, 200 starboard midship)
Ri237 - 5 adults, (860lbs), full ramfill ballast (the boat DOES NOT HAVE PnP)

control boat: My 230 - with stock ballast, 750s plumbed in the rear lockers, arrow head plumbed in the belly (a boat WITH water isolating the engine compartmentt).

we lowered the Ri237 off the lift, used the ramfill to soak the tanks, went to surfing. It was by far the quietest. Second quietest was my 230 with fat sack isolation. Not only was the G the loudest of the three, it was the loudest of any boat we tested.

the important piece here is that CC owns technology that can make our experience better. i hope, on that, we can agree.

[greggmck]

More useful would be actual sound pressure measurements in these boats vs. an opinion. Surfing a boat a few times and coming up with an observation is andidotal at best.

Several of my Blusurf team members are sponsored by Centurion. We train together regularly... Practicing at Worlds in the Fi...
https://www.instagram.com/p/B2DEDrZA..._web_copy_link

I'm not arguing that the Centurion is quieter or not, just that after spending extensive time in both boats I have never noticed this.

[Kenv]

Yeah....now I'm curious to hear it myself. From Worm's first post on this...he's saying the Centurion was BY FAR the quietest....not just maybe...not just a hair...but I imagine noticeably different. I don't think you even have to surf a boat a few times to tell which one is quieter than the other. SOOO..who's ear is better...Worm...or Greg.....Worm says "**** yeah...Centurion quieter...Greg says "I never noticed this"......I bet I could tell with one 5 minute ride in each boat.

[tdc_worm]

More useful would be actual sound pressure measurements in these boats vs. an opinion. Surfing a boat a few times and coming up with an observation is andidotal at best.

Several of my Blusurf team members are sponsored by Centurion. We train together regularly... Practicing at Worlds in the Fi...
https://www.instagram.com/p/B2DEDrZA..._web_copy_link

I'm not arguing that the Centurion is quieter or not, just that after spending extensive time in both boats I have never noticed this.

that's a good call out on measuring DB...helps to separate the objective from the subjective? i did a little search, turns out there is an app for that:

https://thenewyorkhearingcenter.com/...r-smartphones/

we should set up an experiment measuring idle, surf and cruise speeds.

[scottb7]

So many factors in play all of which overlap...in no order:

• How much you paid for the boat
• How brand loyal you are
• How much you talk vs actually listen
• Which boat is really quieter
• How willing you are to admit something to yourself
• How willing you are to admit something to others
• How loud the stereo is on
• How old your ears are

What am i missing?

[vision]

I own Nautiques. The Centurion is noticeably quieter unballasted or ballasted. You do have to turn off the stereo to appreciate. I will say the 2020 Nautiques are at least not as noisy as the 2019s. Not quiet, but better. A db reading woukd be useful.


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