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Hein    59

2016_first_day_launch.jpg

 

 

We've owned this boat for about a year and we are hooked on wake surfing. So I've been making some improvements and have ambitions to do more. Who doesn't like a project, anyway...

 

Last summer I added 2 more hard tanks in the back on top of the stock hard tanks. Probably should have went with Enzo sacs but would have to fab a better enclosure for those. Additional hard tanks were easier at the time. Also added a bow bag (with vent and a drain pump) and another pump to fill it and the bag we put on the back seats.

 

The extra hard tanks are plumbed in parallel with the stock tanks. I added dedicated drain pumps to the new tanks this spring so they would drain quicker.

 

starboard_rear_upper_hard_tank.jpg

 

port_rear_upper_hard_tank.jpg

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Hein    59

Spruced up the wiring for the sound system, reconnected the tower speakers and added a 12" Polk sub to the kick panel. Also added a small digital volt meter (above heater vent) so I can see what the battery voltage is when I power up with the Perko switch. I cut the kick panel into two pieces so there is a smaller piece on the left that can be removed to access the batteries.

 

12inch_subwoofer_in_kick_panel.jpg

Edited by Hein

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Hein    59

Oil filter relocation:

 

5/8" ID hoses with 150 degree and 90 degree AN ends.

remote_oil_filter_hoses.jpg

 

engine connections:

remote_oil_filter_engine_connections.jpg

 

filter mounted to front starboard engine mount.

remote_oil_filter_filter_mounting.jpg

Edited by Hein

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Hein    59

I designed some cowls for the side swipe ports to help reduce exhaust noise. These are 3D printed by Shapeways. We tried version 1 last year but they fell off because I hurriedly attached them with silicon sealant. The noise was less but we didn't get a chance to fully test with them. Version 2 below is attached internally with small angle brackets held on by the screws in the sideswipe bezel. And then the perimeter is sealed with urethane adhesive. Hopefully they'll stay put this time so we can make a proper evaluation. I am hoping these will keep the exhaust gasses submerged so we won't have switch the exhaust to just one side.

 

sideswipe_cowl_v2.jpg

Edited by Hein
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DarksideR    1,678

WOW! Other than the hard tanks, I'd say you've done a bang up job on the mods! Keep us posted on the Sideswipe baffles for sure! And ... ditch those hard tanks and get Enzo sacks. You'll be glad you did! What's this about an enclosure for them??? The only thing you should need to do is reinforce the locker/engine dividers. And that's even negligible.

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Hein    59

Thanks and agree that bags are a needed upgrade. Our dividers would need some help for sure. There is quite a bit of sharp stuff (fiberglass edges, etc.) where the bags would go so would need to sort that out.

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stoked    1,041

Awesome!!!!! Solid work!

 

Those Enzo sacs are pretty tough!!! It should be minimal work

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Hein    59

Thanks for the info regarding the Enzo sacs. Being new to wake surfing boats, we didn't realize how much innovation is being applied to improving the size and shape of the wake. I think it's awesome! Adding ballast is straight forward enough. We ride on the Columbia River with barge traffic so would like to keep the rub rail mostly dry and prefer to be more or less evenly weighted.

 

So in attempt to draw the wave out a bit I added a 'beaver' tail to the OEM fixed trim plate. It's CNC'd to fit over the OEM tab and attached with two rows of 1/4-20 bolts. There was no real reason to flare it out other than to not have it rectangular. Material is 1/2" HDPE (Seaboard). It's was on there all last season. There is a little bit of flex in it.

 

centurion_beaver_tail_top.jpg

 

centurion_beaver_tail_bottom.jpg

 

Our wave on a good day.

alex1.jpg

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ENZODAYZ    3

I designed some cowls for the side swipe ports to help reduce exhaust noise. These are 3D printed by Shapeways. We tried version 1 last year but they fell off because I hurriedly attached them with silicon sealant. The noise was less but we didn't get a chance to fully test with them. Version 2 below is attached internally with small angle brackets held on by the screws in the sideswipe bezel. And then the perimeter is sealed with urethane adhesive. Hopefully they'll stay put this time so we can make a proper evaluation. I am hoping these will keep the exhaust gasses submerged so we won't have switch the exhaust to just one side.

 

sideswipe_cowl_v2.jpg

How did the second set of cowls for the side swipe turn out? Did they cut back on the exhaust noise?

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Hein    59

Noise results for the cowl were good but not sure about whether there was any improvement to exhaust smell for the rider. We still ran with the sideswipe set to the opposite side as the rider. We'll leave them on and do some more evaluation. Here is a video while surfing at about 11 mph.

 

And one at the dock at idle.

(Before the ballast tanks were full. With tanks full the exhaust is underwater.)

 

 

Close up while surfing:

 

Edited by Hein

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gravity12    82

That beaver tail has me interested.  Did it work as you expected? 

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Hein    59
On 7/16/2017 at 10:38 PM, gravity12 said:

That beaver tail has me interested.  Did it work as you expected? 

I think it helped. Want me to machine one for you?

Edited by Hein

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Hein, I have the side swipe as well (04 cyclone)  and am looking for ways to decrease the noise. How effective was your cover?   I've been looking at these: 

Slip-in silencer 

http://www.cpperformance.com/p-12622-4-slip-in-silencer.aspx

Or 

Exhaust baffle

https://www.bakesonline.com/detail.aspx?ID=3278

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Hein    59
6 hours ago, Maxpowers1207 said:

Hein, I have the side swipe as well (04 cyclone)  and am looking for ways to decrease the noise. How effective was your cover?

We think they were an improvement but can't compare to the silencers/mufflers you are considering. Did you watch the video on youtube?

Finally getting some work done on the boat since I had a shoulder worked on.

Custom bags to replace our tanks.  Not looking forward to the plumbing/electrical work. We already have a bow bag and separate pump and two pumps and sprinkler valves for 6 hard tanks we had in back. Went with two bags one each side for more control than off the shelf enzon sacs. The rear ones are notched at the back to extend over the cover box I made for the sideswipe exhaust piping and valve.

Bags

custom_enzo_bags_aired.png

sideswipe cover

sideswipe_cover_box1.png

We have been running a suck gate and water is entering the vent so I machined some plugs that I will insert into the last 2 holes under the vent cover. The remaining two will allow plenty of air in. Also added a drain port and hose that will lead to the bilge so the carpet doesn't get soaked.

plugs

enzo_vent_plugs_back.png

installed:

enzo_vent_plugs_installed.png

drain port. I bonded the fitting in with 3M 5200.

enzo_vent_drain_outside.png

inside where hose to bilge will be attached

enzo_vent_drain_inside.png

Also replaced the spark arrestor with an air cleaner. PCV hose into the end.

air_filter_with_pcv_hose.png

more progress coming up...

Edited by Hein
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On 5/21/2016 at 11:30 PM, Hein said:

I designed some cowls for the side swipe ports to help reduce exhaust noise. These are 3D printed by Shapeways. We tried version 1 last year but they fell off because I hurriedly attached them with silicon sealant. The noise was less but we didn't get a chance to fully test with them. Version 2 below is attached internally with small angle brackets held on by the screws in the sideswipe bezel. And then the perimeter is sealed with urethane adhesive. Hopefully they'll stay put this time so we can make a proper evaluation. I am hoping these will keep the exhaust gasses submerged so we won't have switch the exhaust to just one side.

 

sideswipe_cowl_v2.jpg

Hein, I'm just following up with your cowls...did you make them yourself or buy them?

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h20king    791
On 8/8/2017 at 7:26 PM, Hein said:

We think they were an improvement but can't compare to the silencers/mufflers you are considering. Did you watch the video on youtube?

Finally getting some work done on the boat since I had a shoulder worked on.

Custom bags to replace our tanks.  Not looking forward to the plumbing/electrical work. We already have a bow bag and separate pump and two pumps and sprinkler valves for 6 hard tanks we had in back. Went with two bags one each side for more control than off the shelf enzon sacs. The rear ones are notched at the back to extend over the cover box I made for the sideswipe exhaust piping and valve.

Bags

custom_enzo_bags_aired.png

sideswipe cover

sideswipe_cover_box1.png

We have been running a suck gate and water is entering the vent so I machined some plugs that I will insert into the last 2 holes under the vent cover. The remaining two will allow plenty of air in. Also added a drain port and hose that will lead to the bilge so the carpet doesn't get soaked.

plugs

enzo_vent_plugs_back.png

installed:

enzo_vent_plugs_installed.png

drain port. I bonded the fitting in with 3M 5200.

enzo_vent_drain_outside.png

inside where hose to bilge will be attached

enzo_vent_drain_inside.png

Also replaced the spark arrestor with an air cleaner. PCV hose into the end.

air_filter_with_pcv_hose.png

more progress coming up...

Spark arrestor is there for a reason and are required by law in Oregon. When you get stopped for a inspection they check the spark arrestor and verify it's clean 

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Jake707    166

Same in CA. Hell they check my dirt bikes for spark arrestors every time. 

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Hein    59

Thanks for the replies.

I am aware of the requirement but would rather have clean air going into the engine.  IMO, the AEM air cleaner will be fine for arresting sparks but I suppose I could get an SAE rated one from K&N. Not too keen on their performance and having to soak them in oil. Seems that would be more flammable than a dry filter.  We had our boat inspected last year and the sheriff never lifted the engine cover. Your results may vary.

h20king, Glad to hear your input but please don't quote all my photos if you want to reply. It' seems sort of redundant.

Edited by Hein

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h20king    791
5 hours ago, Hein said:

Thanks for the replies.

I am aware of the requirement but would rather have clean air going into the engine.  IMO, the AEM air cleaner will be fine for arresting sparks but I suppose I could get an SAE rated one from K&N. Not too keen on their performance and having to soak them in oil. Seems that would be more flammable than a dry filter.  We had our boat inspected last year and the sheriff never lifted the engine cover. Your results may vary.

h20king, Glad to hear your input but please don't quote all my photos if you want to reply. It' seems sort of redundant.

Really? I'm still figuring out the new sight. Fact is though this is a public site  if you don't like the way people reply don't post.

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Hein    59

Dearest H20king,

Sorry to hear that you are having trouble figuring out the new interface. My request to you was friendly. I thought it would be fun to share some work I'm doing and provide some content for the Centurion Crew to enjoy. The flavor of your reply has me reconsidering.

In the mean time...

I contacted AEM to see if their filter would meet the flame (its not for sparks) arrestor requirement and will post their response.  The OEM flame arrestor was loosely installed with two tiny screws on one side. I am pretty sure it would have blown off with a backfire so probably not adequate in the first place.

I also had a look at the Oregon boating laws and the requirement is so old (1948) that it predates the electronic fuel injection that most all inboards have these days. I don't think its likely that these newer engines will backfire during normal operation. It has never happened on our boat. But I do remember it being a more frequent on boats with carburetors which were easy to flood if you pumped the gas too much.

All the best,

Hein

Edited by Hein

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Hein    59
On 8/10/2017 at 1:07 PM, Maxpowers1207 said:

Hein, I'm just following up with your cowls...did you make them yourself or buy them?

I had them 3D printed at Shapeways.com. I can make them publicly available via my shop there if you would like to purchase a set.  I won't mark them up so you can get them at my cost. There is a right and a left and the price is $40 ea plus shipping.  There are some little brackets I made by hand that you would have to fabricate. I used aluminum angle. Also have to seal the edge where it meets the boat with some 3M 4200 or 5200 adhesive.

P.S.   I made them available at our shop:

https://www.shapeways.com/shops/impactproducts

Edited by Hein

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Hein    59

Bags are all in and plumbed!  First photo is of starboard bag looking towards the back. The step/box covers the sideswipe valves. They are made of Celtec expanded PVC. A bulkhead comes forward and has a channel for the engine side panels. I CNC'd new ones to fit.

starboard_rear_bag+ventlines_and_sideswi

Below is an earlier photo of one of the the custom inner bulkheads that go beside the front bags under the seats. Aluminum channel was attached to the lighter edge for the engine side panels. I re-used the hard tank brackets to attach the new bulkheads at the bottom. I glued blocks under the seats to fix the top of the bulkheads. Then fully carpeted the space.

starboard_underseat_bulkhead_looking%20f

Below is the rear end of the port side under seat bulkhead with new divider panel beside the engine. I rebuilt the whole setup on both sides to fully constrain the bags on the inside.

port_underseat_bulkhead+divider_panel.pn

Below is the port bag installed showing new engine divider panel and vent lines.

port_rearbag_undeseatbag+dividerpanel.pn

We now have 4 ballast fill pumps. This photo shows the OEM pump (above) which fill the rear bags and the new pump horizontal which fills the front bags which are tee'd together. I retained the original separate drain pumps. Just don't think we can keep from damaging the  the reverse-able pumps by running them dry.

starboard_side_ballast_pumps.png

Below. Each fill pump is connected to a dedicated port with ball valve.

ballast_inlets_4_1in_ball_valves.png

One of the pumps is used for the bow bag and bag we throw on the seat sometimes. We added a couple thru-hull fittings to vent and drain this bag.

bow_bag.png

Edited by Hein
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Hein    59

Cut and installed some new aluminum channels and CNC'd a slip-in panel for the bottom half of the walkway to the bow. Used some VHB tape on the back of the channels to attach them more securely than the 3 #8 screws used at the factory. I made the panel out of Celtec expanded PVC instead of seaboard HDPE. It's lighter and a smidge thinner so doesn't need to be machined down to fit inside the channels.

pass_through_panel_from_back.png

pass_through_panel_from_front.png

We keep the seats propped up when the boat is in storage so air can move through.

Edited by Hein
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