If you have any questions or comments about what we are doing - make them. Blaine tries to answer every one of them over coffee in the morning. It's kinda his thing and I personally think he enjoys it! So please keep him happy and make a comment.

When you over build mounts you will never have to be concerned about a failure. Well done. Something I always wanted to learn is Tig welding. I have done industrial Mig and Stick welding for years. I own a Miller Mig with an aluminum spool that works incredibly well for a small welder. As always just a hint of sexual innuendo in every video just enough to get a chuckle 🍻

@OnboardTangaroa

Ай бұрын

Thanks! The front mounts weren't quite what I envisioned, but I was having a bit of a hard time with metal supply. Surprisingly Vancouver is considerably more difficult to find damn near everything than Victoria. I am happy with the results though. I do likely machine. I have some gas for the mig side now as well so may be using it more. Glad we can keep you entertained! Until next time!

There is so much more room in the engine room! Boot stripe is looking good. Red is her color.

@OnboardTangaroa

Ай бұрын

Thanks! It is a nice color with the bare aluminum for sure.

excellent engineering and so much weight saved

@OnboardTangaroa

Ай бұрын

Thanks! We have dropped about 6000 lbs of weight going to the new engines.

This is Grandma and Grandpa in Spokane! Your personalities is what sold me on your channel! Plus I am excited to see your future!!!!!

@OnboardTangaroa

Ай бұрын

Lovely to have you guys join us! We try to keep it pretty light. Stay tuned as there will be lots of futuring happening 😁.

It's almost like Blaine knows what he's doing 😂. Congrats on 10k guys. 100k to come.

@OnboardTangaroa

Ай бұрын

I can hold my own 😁. Thanks Justin! We will just keep doing what we are doing and see where it takes us.

Had thyroidectomy (at least 20 years ago) and was in the hospital for 3-4 days after surgery! Not fun, but glad I did it! I think I noticed that you have a fresh scar there, I’m surprised you are up and about and so active. Wonderful!

@OnboardTangaroa

21 күн бұрын

I can't even imagine having to stay in a hospital that long after a surgery. Its miserable even for a day! At this point it has not been all that long since the surgery. She is very good at keeping it covered up though so the scar can heal.

Nice work. Hard to imagine those Cummins will be powerful enough to power that big yacht. They look miniscule compared to the big honking 12 cylinder prior powerplants.

@OnboardTangaroa

Ай бұрын

Thanks! It's pretty wild imagining but it's all in the math. Tangaroa is a big boat but not a fast boat. If you don't need to go fast your power requirements drop exponentially. That being said, the Cummins 6.7 marine engines are rated to a max of 550HP and 1250 ft/lbs. The Detriots we had were rated at 458hp and 1200 ft/lbs. Eighty years of technological advances go a long way.

@keimo2007

16 күн бұрын

​ @OnboardTangaroa Iagree.. Those Cummins are overkill if anything not underpowered! Care to elaborate what's your typical cruising speed? Did you consider smaller ones? Would 2x 200HP not have been enough?

@OnboardTangaroa

16 күн бұрын

Typical cruising speed is 9 knots. We could have gotten away with less engine but these are easy to find and have fantastic parts availability.

Miss you guys . Always Nice to see Blaine in his element. Great job on the vids 👍🏽

@OnboardTangaroa

Ай бұрын

Miss you too bud! Make sure you reach out next time you are in Vic. Would love to catch up. Thanks for the compliment!

looking at the outro, the vessel has very clean lines cutting through the water, hardly any wash, it will be interesting to see her cruising with the new engines.

@OnboardTangaroa

Ай бұрын

We are traveling pretty slowly in the outro but even at cruise speed the disturbance is minimal compared to many boats we have seen.

The overall project is cool enough but the fab work is the icing on the cake as we would all like to do a project like this in our mind but we lack the vision and skill. STill cant get over the size difference in the engines.

@OnboardTangaroa

Ай бұрын

Glad you are enjoying the videos! I enjoy the fabrication side but I must admit I am getting a bit tired of working with the thick metal I have been using lately. Need to get the boat back in the water so I can take a break. It is pretty cool walking into the engine room and seeing how much less "busy" it is now. Thanks for watching!

Amazing work

@OnboardTangaroa

Ай бұрын

Thanks!

Dang, do clamp the pieces when drilling with the drillpress! Easy to lose fingers and / or mash hands trying to grab the now spinning piece. I didn't want to watch that... Anyway, what a fabulous boat! Too interesting all the permutations of how it is currently configured, and how you are managing that.

@OnboardTangaroa

24 күн бұрын

I sometimes clamp if the holes are big enough or the drill press is powerful enough. I wasn't too worried in this case as the belts would slip if it grabbed. Glad you are enjoying the videos! Plenty more to come!

Please wear safety glasses when grinding

@OnboardTangaroa

Ай бұрын

We try our best to remember but do forget at times.

Great work! Im sorry, even though i drive a Cummins . Those engines are soooo tiny in there, unbelievable how much room you have now!!! It’s going to work so much better and be quiet!

@OnboardTangaroa

Ай бұрын

Thanks! It's pretty mindblowing how much space that freed up. We are very much looking forward to seeing how much difference there is.

@troyturner-ve1zj

Ай бұрын

@@OnboardTangaroa I hope it does change the handling to much! Very interested in the fuel burn and cruising speed you achieve! I hope you nail the props and transmissions first try! Been there done that and as you probably know, can get expensive when your in your prop size!!

@OnboardTangaroa

Ай бұрын

It shouldn't adversely affect the handling. The weight was removed forward and the boat has always had a bit of a nose down push underway. We are expecting around a 34% reduction in fuel burn based on bsfc numbers of the Detroits vs the Cummins. Hoping to get the pitch right first try as well. Not too keen on having to come out of the water again any time soon.

Going well team . . 💐👋🇳🇿🍻twa

@OnboardTangaroa

Ай бұрын

So far so good! Need to do a big push this week.

Could you provide a link to the company that made the custom couplers. Looks like a really good solution to a problem I’ve been dealing with.

@OnboardTangaroa

24 күн бұрын

The shop name is VM Dafoe. Their website is vmdafoe.com/ . They can be difficult to deal with at times but do excellent quality work.

What do you think of stray current corrosion detectors?

@OnboardTangaroa

Ай бұрын

I haven't really done much looking into them. I do have a hull potential meter onboard though and I do check it regularly. The yacht I work on does have some sort of a more advanced system. It measures potential and actually adjusts hull potential through an anode. I am not sure of the specifics but it seems to work.

You all are taking a big horse power hit aren’t ya from the Detroit to the Cummins

@jakleo337

Ай бұрын

A massive gain in fuel mileage.

@OnboardTangaroa

Ай бұрын

Not really. The Detroits were the least powerful of all the 12v-71's. I think they were rated somewhere around 400HP . Of that 400 we have only ever demanded about 120HP. The new engines, while capable of 400HP will be derated to around 300HP. That still leaves enough for our original demands plus gobs extra for emergencies. Any additional power we had with the Detroits would have been completely unusable.

@keimo2007

16 күн бұрын

@@OnboardTangaroa "The new engines, while capable of 400HP will be derated to around 300HP." Care to elaborate, Does that derating mean something else than just reducing the max power output? What are the benefits of doing so? I assume it requires software tweak?

@OnboardTangaroa

16 күн бұрын

You have it correct. Derating them basically just reduces maximum engine load and is a function of the programming in the ecu. The benefits are just reduction in wear and tear. We could do the same just by "keeping our foot out of it" as well.

@keimo2007

15 күн бұрын

@@OnboardTangaroa Thanks for elaborating! Cheers!

So is the bare aluminum a new style or just a preference! What will you have to do to keep it protected?

@OnboardTangaroa

Ай бұрын

The bare aluminum is a preference for us but most of the fishing boats up here in the Pacific Northwest leave the hulls bare. It may not be as "attractive" as paint but you don't have any maintenance to protect the aluminum. It will form an oxide layer by itself which inhibits further corrosion.

@debragonser745

Ай бұрын

@@OnboardTangaroa thanks for answering me! I’m not a boat person. My hubby loves boats and I love you two so we enjoy your channel together. I would prefer the aluminum over chipping paint any day! 😉

@OnboardTangaroa

Ай бұрын

I try my very best to answer all of the comments. We are so very glad you guys can both enjoy watching the channel. Yes, the bare aluminum makes things soooooo much easier. Take care!

What is the different specs between the old Detroit 12v71s and the Cummins inline 6 cylinder 6.7 liter replacements? What is the Hp and torque output of the engines and how much is the weight change between the two? How much slower are the Cummins re-power units going to push the boat at both cruise and top speed for when you need to make a dash top speed run for any reason? I expect your Cummins fuel consumption will be between 40% and 60% less than the Detroits at the same hull speed.

@OnboardTangaroa

27 күн бұрын

The Detroits were rated at 456HP and 1200ft/lbs with a 2:1 gear ratio. The new engines will likely be around 300 HP and 860 ft/lbs with a 3:1 ratio. The 12v-71's weigh around 4900 lbs. The Cummins should be in the 1750 lb range. The Cummins engines won't push the boat any slower than the Detroits as both engines far exceed the hull speed power requirements. My fuel burn calculations are showing around a 34% reduction in fuel consumption at our cruise speed. The sea trial will tell all. Looking forward to getting it all done. We should be launching in the next week or so. Thanks for watching!

@americanrambler4972

26 күн бұрын

@@OnboardTangaroa Thanks. Are you going to need to do new meta center, center of buoyancy, center of gravity and stability testing and are calculations with all the significant weight changes and locations you’re doing? That’s not an insignificant amount of weight and mass changes you’re making. Are you going to offset the changes with additional tankage and storage?

@OnboardTangaroa

26 күн бұрын

Not planning on any stability calculations. I'm more of a visual thinker. I know the location and weight of all of my tankage. That weight is akin to having one of our three skin tanks empty. My thought was to build a few seawater ballast tanks in the bilge of the engine room. That way we can pump the water in as we need additional ballast. We also still have one generator and a few batteries going into the engine room. It should be able to offset the weight removed from the Detroits or at least close. Tangaroa is inherently fairly stable as there isn't a lot of weight up top and the hull is progressively and substantially thicker from the chine down.

Hi guys, if Blaine could tell me how much of a weight savings you should have after the refit.

@OnboardTangaroa

Ай бұрын

Thanks for watching Hank! We will be roughly 6000lbs lighter after this refit. Enough weight loss down low that I am looking into seawater ballast tanks to help us maintain stability when we are empty of fuel.

@HankFrederiks

Ай бұрын

@OnboardTangaroa I was interested in fuel savings. Or do you calculate that a gallon burned per hour at the same speed.

@OnboardTangaroa

Ай бұрын

For percentages I just took the data from both the detroit and cummins bsfc charts which list lbs/hp/hr for each engine at known rpm ranges. At our 1000RPM cruise area the Detroits are literally off the chart for low bsfc. Judging by the curve they would be sitting in the .48lb/hp/hr range. The Cummins with the new 3:1 gearboxes would be closer to the 1500 RPM range and show around .32lb/hp/hr. You can just determine the fuel burn difference from there.

I was twitching watching Janis use an electric die grinder without safety glasses 🫣 Aluminum chips flying everywhere 😲 Somebody needs to give that girl a slap on the wrist or she might like a spanking better lol. Have a discussion about PPE. Yeah, I'm guilty about not using gloves or ear muffs. I sure don't screw around with eyes. Safety squints don't cut it. I've never tig welded before, we didn't do it in our shop or have one in our shop. With those engine mounts, I'd burn them in with 7018. I know some would say mig weld them. I don't trust wire feed welding. I want something to hold stick welding with 7018 it is. I know guys will argue that mig strong, yeah, I call bullsh*t. I know my welds hold the proof is in the pudding. The shaft couplers that come off the detroits talk about overkill 😂 I think you are going to notice a difference in quicker response when it comes to slow speed maneuvers. You won't be waiting for all that rotational mass to slow down or visa versa. You may miss it when cruising, the boat is prolly close to 1000lbs lighter maybe more.

@OnboardTangaroa

Ай бұрын

Lol, when I watched the video before Janis posted my first comment was "You know someone is going to mention the lack of safety glasses". There may or may not have been a spanking later😁. Funny, I have been to the hospital twice to have small bits of metal removed from my eyes. Both times I was wearing safety glasses. Never had to go to the hospital when I forgot to wear safety glasses. Coincidence or. ???😂. I do love tig welding. It is so peaceful compared to slag flying everywhere. Its very similar to oxy/acetylene welding but cleaner. I have a fair bit of mig experience but absolutely no stick experience. Tig is pretty much my go to. It is just unfortunately very slow. The boat is actually 6000 lbs lighter without the Detroits. Will need to do some ballast work for sure.

New to your channel. Are you two, mother & son?

@OnboardTangaroa

25 күн бұрын

We are not. Husband and wife of 22 years. Only 5 years difference in age.

@JustJefffff

25 күн бұрын

@@OnboardTangaroa Thanks for responding. I was just curious & wasn't implying anything. I'm really enjoying your channel

@OnboardTangaroa

25 күн бұрын

We get that a lot. Glad you are enjoying the channel!

Way not go to a place to have it arc welded it would be a lot better.!!!!!!!!!!!

@OnboardTangaroa

Ай бұрын

I just got it root welded. We brought it over to Action Welding to have Jim and Max finish it up. My welder just wasn't up to the task.

Careful with dissimilar metals like steel and aluminum. They are trouble when put together in salt water...

@OnboardTangaroa

Ай бұрын

Hopefully I won't be getting any saltwater up on my engine mounts! If you go through our past videos you will hear me harping about dissimilar metals on board. They actually used COPPER for fuel lines on board. You can visibly see everywhere one of those lines was touching the aluminum.