Don't make the same mistake that Steve Morris almost made recently. You *NEED* waste gates and BOVs to keep the turbo speed controlled. Just bleeding off boost will make the turbo heat the intake air and you will have less air (by weight) coming in to the engine and at the temperature you get it in, you will get more knock and less power on top of that. Steve has a good video explaining it up on his channel, really recent too so not too hard to find.
@@Scoots1994 Last i heard is that steve is using wastegates, but replacing the BOV's with boost bypass controllers, so that he can have the turbo's spooled up on the line ready to make 60psi but with less boost going to the engine, then as he goes down track the boost bypass' close gradually. but yes, not using wastegates will cause the turbo's to be going WAY over their efficiency rage and creating hot, useless air
Mix that pail of coolant with water so it's like 10/90. The bacteria that tends to make it icky is the anaerobic type in my experience, so it only grows once the aerobic bacteria forms a film on the surface and cuts it off from air. If you keep the top layer skimmed it lasts a lot longer. They also make little cakes you can throw in to slow down the process.
20+ years CNC service here. Blue coolant is fine. The main thing is to make sure the coolant you use is optimal for what you’re using the machine for. Synthetic coolants can sometimes be rough on machines. Try to clean the coolant tank and replace the coolant annually to keep it working at its best. Also, keep an eye on concentration. Rich coolant mixes can sometimes do more harm than good. If evaporation happens, it’s generally just the water evaporating, so adding more mix can sometimes richen the concentration.
When ours gets rich we just spray down the inside of the machine lightly with a water hose to help clean up the dried on coolant and then add some to the reservoir.
Anyone who has welded stainless and formed pipe like that knows how much talent it takes. I don't know who that welder is but he is a true artist. I wish I had half his welding skills.
I work in a machine shop. We use cimstar for the coolant, like a inch or 2 in 5 gallon bucket rest water. Just avoid dumping straight water on your table. Coolant should look a milky color when it gets real dark flush it out and refill Waylube 68 for the machine oil. Straight!!
The coolant in your machine is very important.. and can grow bacteria, cause staph infections etc if not properly maintained. Also the fluid you put in is concentrated and needs to be "brixed" to achieve the proper concentration. Wont get the best results by just dumping it straight in and running it. Get yourself a brix refractometer 🙌🤓 proper coolant brix can improve surface finishes aswell 👍 hth
hmm, learnt something new. having worked in the alcohol production industry i always thought/assumed brix was just sugar content, when its actually all dissolved solids. thanks!
Get some dip slides / incubator and check it on regular intervals. Also get some PH strips and check it weekly. The PH will tell if the bacteria isn't growing. You can also get antifoam in a smaller bottle that can dampen down the foam. It looks way better than mine did, the growth is like a solid goop. We use the blue in a wet dust extraction system, I have seen it called "smurf blood" in CNC circles.
@@jackmiller8851 This is the first time i've seen the term used outside of wine making. I guess it makes sense that a brix measurement would apply to other kinds of solutions too.
Rob took a break of exactly 2 business hours after Pike’s Peak and got right to work on the 12-rotor, now THAT’S dedication 😮💨 thank you Dahm and the whole team 🙏🏼
3:05 keep in mind, that fluid down there is a breeding ground for infection. Do not put your cut fingers in coolant. It's like lottery... only every time you loose there's a guy with a hammer waiting to hit them piggies. Also, i recommend on the next fluid swap, that you do a forced flush and clean of the whole machine and check any rubber that might be in contact with the fluid (if any - unsure of this brnd).
My old shop ran XTREME CUT 250C in the CNC Mill. We ran around 7-9% dilution(1 inch of coolant in the bottom of a 5 gallon bucket, the rest water will get you close). Keep the water to coolant ratio in spec or you may run into issues with poor surface finish and/or excess tool wear. If you don't have a refractometer you should get one. Hope this helps!
Hey Rob 👋 I'm going to say it. The cinematography production value is extremely high in this video. If only there was a place that rewards such hard work and dedication.
Omg, I got an add precisely at 16:20, right after the “there might be a 12 rotor at…(ad)”. I thought that was you screwing with us with your usual endings Rob💀🤣
@@RobDahm your team is also awesome. They were like a professional pit crew on the hill climb. From where you started to what level you are operating at is really inspiring. Not many content creators that have your passion for excellence. Thank you.
@@RobDahm You may actually o_O.... to account for that volume intake from all three of those monsters just to not starve it, I don't know rotary math too well but that's gotta be a ton of CFM at positive intake pressure given you've got somewhere for it to go
The moment Pikes Peak wrapped up we got right back on this monster. Its rather involved as you can see with the fuel rails and planning something that has never (nor should ever) exist haha
Almost had an hearth attack when I herard “The rumour has it there might be 12 rotor at sema” and got an add right after that. Thought that was the end of this video.
Rob, just a thought, on the lower part of the intake manifold, closest to that header. Integrate a stand alone cooling loop. Something that bolts directly to the intake, shares surface area with the bottom and flows past, much like water cooled PC components. Separate electric pump and radiator with temperature controls for flow rate. It would solve the odle heat issue and pull the temps away more efficiently
Coolant brand is subjective IMO. I use qualichem 251C for my Haas. But what IS important is using clean water, and accurate concentrations. You need at minimum a basic refractometer that reads between 0-15% brix, and some water test strips. That will tell you if your concentrations and water are good. It's critical that it's at above a MINIMUM of 7% otherwise that water is going to rust out your machine. That's what it shows on the back of your Haas, that little sticker is referring to the coolant concentration.
The welding in this video is just god damn artistry. Every time I watch one of these videos I'm caught between thinking it's an amazing feat of engineering, and that it appears to be a project fueled by enthusiasm and insanity. It could be both. If I have a concern, it's that this engine has so much potential, that attempting to exploit its maximum potential may exceed the physical limits of the materials. The heat generation alone will be absurd.
My main concern is that poor output shaft. All three banks eventually send their power out a single shaft and that thing is going to be under ridiculous strain.
Have you considered ceramic plating those pipes? It would help a lot with radiant heat, that way you would later have less heat to deal with, and more heat getting into turbos is usually better. Keep up the good work! I cant wait to see the final application of this motor.
@@gupti What heat is he experiencing? I've used Jet Hot on my headers in the past (non-turbo). They have a 2500 degree coating; I'm sure it's not cheap.
The engineering behind this project is something I am completely fascinated in watching unfold. As you said, I’m interested to see how you deal with the heat problems. 3 turbos Rob? THREE?? You seem to have lost your marbles. I love it. Everything else you’ve done has trained you to deal with this very 12 rotor, and I’m incredibly proud. Living your dream, making friends, having fun. That’s what it’s all about. I wish I could be apart of it. I have a feeling this is going to be quite the challenge, much like the 4 rotor was years ago now, but it’s also going to be so worth it in the end.
I just watched a video where a turbo technician talked about the differences between bleed valves in the intake side, and wastegates on the exhaust side. They found they made less power with the bleed valves and had excessive wear on turbos. Because the Turbo is still trying to make 50Psi even if you are bleeding it down to 30. So you are going to see a lot higher shaft speeds, at the same boost level. Not to mention the side effects that come with the higher shaft speeds at the same boost. Which is excessive production of heat by the compressor wheel, and excessive wear on the turbo bearings, as well as higher oil temperatures post turbo, and higher egt's. Now I'm not an expert by any means. And at this point i'm just regurgitating information I obtained from what I deemed a reputable source. But if you're only doing it for packaging reasons I get it. But for longevity's sake and peak power, if you're going all out, and you have the room, maybe wastegates might be a better idea😂
Was able to see the 3 rotor and Rob at the WV Hillfest. It was such an experience getting to see and hear the 3 rotor and Rob blasting through the WV mountians. Seeing the car up close one can truly appreciate how special it is that this car exists and the amount of work that was put into it. Got a few pictures and videos, made sure to capture the Pikes Peak inspection and race stickers, and even snapped one of the iconic Dahm laptop. Will say, Rob seems as genuine and real as he is in his videos. Wanted to congratulate him on his Pikes Peak accomplishment and he took the time out of his day to appreciate the words and one can easily tell how passionate and proud he is of his achievements. During the festival on Saturday night he was there taking pictures with his fans. Know the last run didn’t turn out as you had wanted, but hope you had a great time here in West Virginia and it is appreciated that you came out all this way to race and let us see you and the 3 rotor. Can’t wait to hear the 12 rotor come to life.
That's what I am really excited about hearing this monster roar. It will be cool to see it in a boat but meh. Hopefully someday someone will put that motor in something with wheels.
@@jqmark It's probably going to sound a _lot_ different with three separate exhausts for each bank instead of two six-to-one arrangements as Tyson had it originally.
The 12 rota' getting 3x 90s' mm giant Garrett's!!! 2 Haltech nexus R5's needed just to run it and drinking straight methanol. I thought this thing would never run again and the old 00's footage of it being tested would be it. With the engine just being a museum piece. This is beyond dream come true territory for thousands of people. Thanks for making it happen Rob Dahm! The Disneyland of Doritos is nearly upon us friends!
You're going to need something like a 72 Lincoln Continental to have an engine bay long and wide enough for this thing! Can't wait to see what you end up putting it in!
Pretty sure that was the same year Lincoln that my grandpa used for vacation and long trips.. Thing was a floating boat.. I'm thinking of say the Rolls Royce that had the 16 cylinder airplane engine and completely stiffen everything up with extra bracing everywhere.. Thinking that car had 6 wheels so could use 6WD. Or even a Semi truck, possibilities are endless. Could always break the speed barrier on those max speed sand flats..
It mounts to a Chevy Big Block mount, so it's gonna need to go in something like a Silverado 3500. This engine simply will not fit in a car, only a very large truck/SUV. And that's assuming they even put it in a car at all instead of a boat like it was originally intended for.
So cool to see work finally being done on this engine! Altough it is sad not to see Iseah in the videos, I am really liking Fab Robs vibe. Looks to be a very competent fabricator..! Can't wait for the next video in this series.
You can use a "refractometer" to measure the amount of oil in your coolant, it looks a ton of concentrate but that's not going to work against you much besides making a big mist. There should be some information you can look up from the manufacturer on acceptable levels [which varies based on what material or how fast you're cutting] be sure to wear gloves when handling that blue crap. Keep up the great work!
12 rotor at Sema......you heard it folks I don't care if Rob makes Sema.......it just means we get to see tons of stuff about a kickass engine I wish Rob, Isaiah and the team nothing but good luck and smooth sailing from here on out
@@midbc1midbc199Nah, it's most likely going back in a boat. Rob is just getting it working. They might temporarily put it in a Chevy truck or something (i.e. Silverado 3500), but its final mount will be in a race boat.
You and your team sure know how to make a killer video dude. The amount of knowledge in just a small clip is so captivating that I was bracing for most of the video, anticipating a classic Rob ending. I might also add that you guys have been motivating me to pursue video production, and I don't even have much of interest to film lol. Amazing shots and editing as always
Hey Rob you probably won't do it.. but how about putting that motor in an old school repu rotary truck. The bed of the truck would give you plenty of room for that 12 rotor. It could be an mid engine race truck...ganranteed 100 mil views for the series!
The new guy on the channel is an awesome dude...u better keep him Rob he is very talented and he thinks out of the box..Plus he is hardworking too..Great humble mindset and awesome work ethic..🎉
The trick at this point is to commit to things and be a man of your word. No better motivation tbh. I mean obviously i love what i do and know it could be gone tomorrow. But even i want to sit in the shop some days and do absolutely nothing. Positive motivation isnt strong enough when things are good enough. Not wanting to let you guys down is such a driving force for me.
@@RobDahm from your perspective i totally understand, plus still loving the things you do while pouring blood, sweat and tears into everything, just solidifies the fact that this is the path you want to be on, everyday a new adventure, everday is never the same and you strive to create something nobody has even seen before, YOU are the true inspiration here Rob, i am a geek about rotaries and love them so much even before i found your old 3 rotor video back in 2018, as a young, 23 year old kid who loves cars more then anything else in this world, thank you for keeping the rotary relevant ❤️, sending best of wishes on the 12 rotor build from AB Canada
Measuring the volume of each runner is so dope. Tossing that in the memory bank for when I build up to building my own custom system. Guess I gotta get a welder first...
15:30 Wait, what chassis is going to hold this MASSIVE engine?!!! Sorry if this have been answered before! This would be great for a full sized Sports truck like the SRT10 RAM back in the day!!!
He would need a custom chassis..... but technically, this was made for a boat, and his Lincoln Continental is the size of a boat...... so that's what I'm hoping for
This is why I am such a fan, Rob. I live by a mantra: Go ALL THE F#CKING WAY or don't bother. It's not go big or go home. I tell those people to go ahead and go on home. When I see you do things you go ALL THE F#CKING WAY and I am a HUGE fan!! That Pike's run was EPIC and as a lifelong fan of the rotary I was excited to see, and hear, one do this run. Seeing you enjoy this world you have built is icing. That was a lot of effort, beyond building the car, and I have to give you props. Way to go!!!!!! Thanks for the channel and your go all the way approach to what you do. Keep it up. Rotary lovers are on board!!! And 12 rotors, 3 monster turbos. Yeah, a boat. SO, we had an entire decade of American Made Boats. I'm thinking this should go in a 1973 Fleetwood. It's BIG and should hold that engine just fine. Drive train won't but that's for y'all to "fix". That's my two cents of contribution.
your going to need a dyno that can hold at the very least 5000 hp I recommend calling Steve Morris his dynos can and do take upwards of 5000 hp and have been modified to hold it . anything more then that is going to need an industrial dyno good luck finding one of those that will let you test.
It didn't actually look nearly as bad as some I've cleaned. The worst is plasma cutter table water. It's exposed to whatever is in the shop 24x7 and often even more ignored than CNC machines. Ick.
Had to clean out a grinder in work, coolant had globbed up in a jellyfish like film, smell was pretty gnarly but it had nothing on the alien life texture
@@Scoots1994/videos Funny thing is... it's so easy to make a clean CNC plasma setup. Stainless steel basin, with at least 30 cm of standing water, grate at 10 cm, S runners, air hood (and you cover the empty space on the table as the air gets sucked from the work area with wet welding mats) and a skimmer basin added to the back so that it constantly self cleans the top layer of water of trapped dust. Ours is absolutely cleaned and the only maintenance done (other than cleanup of the machine itself) is water change every 2 months, anti bacterial additives, and every four months the entire basin gets cleaned up of the gunk that pools up at the bottom under the grate where the jet can't disturb it. No rust, no foam, no smell. And you don't need to put the best materials up front for this, just good enough, that's the best part. Ours is made from junk and stuff we had around. The skimmer pond that's attached to the big basin under the table is an old CNC oil coolant tank that had its top pierced at some point. Even the squirrel cage fan outside is an old AC unit one we got second hand. Plasma cutters can be made to be clean, just have to make them work right. And on the topic of "work right" ever since the system has been in place, the cuts have been better too. Cleaner and with less dross - so it's having a positive effect on the cut as well, not just our intern's health.
Rob, for the love of rotaries, please look up H1 Unlimited Hydroplanes, they use 3000+HP turbine engines, the last piston engine was last year's twin turbo V12 allison, the rules regarding powertrain are unlimited, imagine swapping the 12 rotors into an F-Zero shaped boat
Hey Rob, Steve Morris tried the boost side blow off valve setup on his pro-mod engine and had issues, he made a video about it and ended up doing both!
Can't wait to see how you are going to defeat the heat. More outside the box solutions, it's going to be interesting. The G55 is a beast. The 12 rotor is one sexy, shiny slab of metal.😆
@@MrDinospike a boat would have to be constant High rev and with it being a rotary engine, that would just generate too much heat and where I believe Rob could probably do it ... it could end up causing other severe issues.
When I first saw this engine, I thought it was always going to be a pipe dream. Now that it is FINALLY coming together, I cannot wait to see the next video, and all that follow in the series!!
this is something you'd see on like a tractor pull build! I don't know how you'll get this thing into something other than a tractor or a boat, but I have faith! And either way, it will be awesome!
thank you rob for making my day 12 rotor content is always needed. what about a carb style intake where the throttle bodies rest on top of the manifold like an old school chevy that way the electronics are safe, a custom design piping can be done and most of all it allows the chamber to be easy to design as well as a true eye catching piece.
I can imagine how insane this thing might look in the end. Just a maze of pipes with three huge turbos making it sound like a jet engine. Could really only see this thing in some form of truck or boat. Honestly it could probably be put in a Locomotive. Just crazy.
I have the perfect use for this monster. Picture a beautifully prepared tractor with this fitted in front. And pulling a tractor pull sled behind to a full pull!
I’d model your current setup in some CAD software so you can play with intake plenum/routing designs. Your exhaust (though beautiful) probably could have benefitted from doing so as well. Great build man, excited to see more progress.
