Building a Semi PP 2 Rotor. Because we maxed out stock ports
HTML-код
- Опубликовано: 16 сен 2024
- T-Shirts: www.dahmracing...
Patreon for Build Videos: bit.ly/2koiw8G
Instagram: bit.ly/RobDahmIG
Subscribe to Rob Dahm: bit.ly/1OAN9yi
AWD 4 Rotor Video Series: bit.ly/2QiFduE
“The rotary vette, was born out of hate” got me rolling 🤣
my favourite line
Rob knows how to handle a semi pp
@@SAIFSWORLDFUN Yes, a Semi PP
Lol 😂😂😂
Going to give him a call
@@palleppalsson lmao
I can vouch for that, speaking from experience ❤
Rob is teaching a new generation of rotary builders.
I love him improving the weak points of rotaries. I truly think Rob can make the reliable rotary possible
No he isnt. He cant even build his own engines that last for longer than 5 minutes. Plenty on new gen builders that know a lot more than him.
@@giddyup3451 bro it’s not 2018 anymore your idiotic hater arguments have long been invalid 😂😂
@Sasha Lemay any Australian engine builder, including the person that he bought his engines from then copied.
@@giddyurp but those aussies don't make youtube and be partly secrecy about how to rotary
rob just came up and spew out anything about rotary with non-secrecy in his book with aussies permission to published everything in his 4 rotary
everyone said rotary don't take 4stroke oil which rob debunk it
weak point of rotary rob disclose it
rotary don't make power which rob proves that it can go 4 digit mark
apex seals sucks which rob is on his own research to which apex is the best rn
he even told people about clearance which in my country it's secrecy and only close friend/student of rotary builder would know
now tell me who is doing exactly this and be informative ?
i'd love to follow them through and shout out to them that they made it big.
The e-shaft thermo pellet isn't designed to relieve oil pressure in the way you described. It's purpose is to block the rotor oil jet cooling port within the e-shaft when the engine is cold. Mazda found that full time oil jet cooling lowered the efficiency of the rotor because the rotor would take too long to come up to temp. The Pellet opens up as the oil temps come up and THEN it allows rotor cooling from the inside from those jets you just screwed in. Cold rotors will also build tons of carbon on a street car and put out more pollution. On a race car that's running full time upper rpm, the pellet isn't necessary.
His audience doesn't know, Rob doesn't know, it's entertainment content, not educational 😂
@@JV_214 Which is why I posted because of all the amateurs watching. They don't know any better because some of them think Rob knows everything because of his unique and cool projects.
Well that's a first. I knew something ROB didn't know! Although I only knew about the emissions aspect, not of efficiency changes. But hey, I'm just a driver, with a dead RX in the drive.
thank you for sharing that, i never would have known otherwise!
You need a probing cycle in your mill to locate off the combustion chamber. Then you don't have to rely on the stock hole position being correct. If you do that, you will also want to use an endmill and circular interpolation to rough the hole out before reaming. A drill will follow the existing hole regardless of how you locate the housing.
Don't know why Rob's not over a million yet. Hopefully the top gear episodes helps him get there 😀
Thanks for the awesome content!
Apparently Rob is doing a bungee jump to celebrate 1million.
I think it's because people like action on youtube, A smaller percentage like the technical videos
@@MattyEngland haha yes! 😄
Because he doesn't play into the algorithm and just let's his channel grow organically. His ratio of subs to views is probably higher than most because of it
@@alexelrod242 not really
I remember when certain types of porting jobs were a secret lol. Rob smashed that annoying trend
He's a fanatic and madman but he doesn't want to be alone on his journey, he wants to show us everything he can. Love him for it.
That's the whole reason Rob is doing this. He's forcibly spearheading a new Era of rotaries, and you know what, it's working.
To be fair, there's still plenty of "secrets" on the matter. All Rob did on this engine was use an existing off the shelf template, something your average home builder has been able to do for decades.
Eh...I have templates sitting in my stash that were made in 2001-2008 for porting types. These arent new at all.
Come for the the Rotary, stay for the kitty
best part of the videos
Damn rob you (and your Crew) are seriously working your asses off. Im impressed.
Yeah they really are putting the pedal to the metal
Rob dahm: spends hours making a video for my enjoyment pouring his heart into his art wanting people to take him seriously.
My brain when I read the title: hehe PP
I can picture A LOT of people just trusting it was right the first time. Good for you for knowing something was not right and doing something about it!
That kitty is so thankful for you taking it off the street and she wants you to know it
-COOLANT SEAL ISSUE FIX Rob, I have had the same issue for years with outside seals. I have gotten away from HYLOMAR and now literally (thinly) coat the seal in PERMATEX ULTRA COPPER. Handles heat WAY better 750F + . Also seen guys use PURE Copper Wire like a crush washer (more durable, no melt). Hope this helps somebody!🙏
Can you expand on your anecdotal experience with this? What engine and how much abuse were you giving it? How long did the seals last for you vs after coating it with that? Thanks brotha this sounds very interesting
@@dooby1445 13b in my 84 rx, done time attack stuff, a few drift events, street drivin on the weekends. At 350-ish (Assembled with Hylomar) It was ok at first, then about 6 months into use, was pushin oil into coolant. On Tear down the seals were shot. Bought goopy instead...Same issue. Guy on forum mentioned the greater heat tolerance on permatex ultra copper, Hylomar litteraly says on it it's not for that purpose, I now see why. Rotary puts out lots of heat, greater heat protection on seals = longer life. Im now at about 400 with no issues 9 months in.. Worked for me... good luck
It's awesome seeing how excited Rob is doing all this.
Best side note that cat loves you guy’s. Been watching for 4 years. You guy’s saved her.
the thermopellet in the shaft is to make the engine warm up faster. WIth it working correctly, on a cold start up it will allow oil in the shaft to bleed out through the small hole and it doesnt let the squirters squirt to cool the rotors. Once the oil heats up it expands the thermopellet and it blocks the hole and oil can now be squirted inside the rotor.
Rob u must always keep the cats in the videos. It is truly what keeps the wife watching your channel brotha 😆.
and how else am I gonna get her to learn about the amazing Winkle "rotary". thanx champ.
These videos are addicting. Just the sheer raw footage and even when there’s mistakes he shows it so everyone including him can learn.
I come for the rotary adventures, I stay for the kitty snuggles :)
So cool seeing the shop cat as a shop cat and not a hobo cat any more!
I remember you trying to feed her all those times and her always running away
I love how Rob cleans the drive shaft, he knows what he's doing 😂
Can't get enough of you content you KEEPS on delivering.
I'm a big fan of Riley Reid... family of yours?
@@g60force commenting for updates for a friend
@@michaelh.1262 i know right XD
@@g60force in all seriousness though his pfp looks like he’s a cannibal, and his grammar is that of a brain dead person, so it’s safe to say he’s a zombie.
I wish if you know what I mean... "what's it gonna take bro"?
41:25 bro I legit lol'd when you whipped out that massive thing, I wasn't expecting seeing something of that heft in a video about a semi pp
" grease in the sparkplug holes." " I don't know what that means." I laughed out loud.
Hey Rob, I work for a company programming for a CNC control software (mostly Lua), I write GCODE when necessary for users and probing cycles often. Using FANUC. In our software I just finished our probe UI. So I'm kinda into probing right now you could say... I know MAZDA has those holes drilled and they're not always exact. If you'd like to drill YOUR holes to their "intolerant" holes(based on their drilling cycles "tolerance issues"). You could create a sub program that contains a probing cycle within it. So your GCODE would command a specific location (I use machine cords for relative locations in know fixtures because it's always the same on the table). Move Z down into the hole (anywhere in the hole). Then your probe cycle would X+, X-, Y+, Y- G31's and store those locations in pound vars for each extreme... with this you know the exact center of the hole (little math required). Then you could tool change from probe, set tool offset and start banging holes! Keep up the good work guys.
Don't cut down the shelf wall on intake port during porting. It's there to induce tumble during low RPM and prevent fuel from flowing into seals around e shaft and removing oil in that area.
This is the first I've heard of that reasoning, in comparison to anti-reversion or whatever else.
Admittedly I work on the earlier blocks, but that lip is rarely consistent between castings. Sometimes it's under the port edge, sometimes it's beyond it, sometimes it's basically flush. Maybe it's something that was refined as time went on (ie. 86+)? Now I'm curious.
Isaiah saying we’re professionals… with Rob dancing in the back was gold!🤣
Next up is acquiring yet another vehicle that wants to kill you: a rotary motorcycle. Norton and Crighton both made some excellent rotary motorcycles. Norton's stuff was even air-cooled, so you could get even more aggressive brap-brap noises from it.
I think this is among the best if not the best informative videos on the rotary subject that You've done so far. I mean it it mentioned a lot of stuff, the seals, springs, superglue, tolerances, proper torque, proper gaskets, keeping it clean, many oil pressure mods, properly checking with a wrench that the engine at least seems to work as it should, the side to side crankshaft slack...
Really nice, with all of this info condensed into one video it would be much easier for an enthusiast to build one semi piproperly themselves.
The rotary compression tester is also simple but genius diagnosis tool.
2:58 What a lovely cat... *.*
I love how he ends his videos without an outro to force you to watch the the ads thinking the video is not over therefore watching them all the way through.
Rob, why don't you run the mazdatrix factory dry sump front covers? That would solve your oil pressure and also volume issues a 3 stage dry sump pump built into the factory front cover would be pretty good at that , no?
They are NLA and if i recall they were extremely expensive. like, as much as a 13b on its own.
Extremely expensive, they dont flow all that much more, and they're near impossible to get as they dont make them anymore(as above guy said...NLA=no longer available)
I like how we have all seen you progress over the years and so has your cat
Rob Dahm knows his stuff and seems like a good dude, not even a rotary guy but its cool to see someone excited and pushing the limits.
Thank you for a long video….I freakin love the long ones….keep it up the dahm good work!
Why are all peripheral ports done by hand? I've never seen one done by CNC on RUclips before and I figured Rob would take any chance to break out the Haas that he can
I think his machine is only a 3 axis CNC. I think he would need a 4 or 5 axis cnc.
This is a complete shot in the dark, I know next to nothing about these machines
He talks about why he isn’t machining it at the start of the video, and says he probably will machine the 4-rotor when he does that. Around here: 0:48
I guess it's cause of the angles, the cnc can only go up down left right and not at a diagonal?
@@acherontiaatropos1 I believe it would be called, Pitch, Roll and Yaw. Depending on what axis you are rotating on.
@@acherontiaatropos1 You can do it with step over ballmilling. It’s longer to do, but pretty consistent. You can get a glass finish if your willing to let ballmill work and small step overs.
Please give this man a million subscribers!!!
Awwww the poor baby kitten!... I have two of those, jealous of each other too 😂
I wanna see a high(er) level of attention out into a renesis like you guys are doing for the rotaryvette and the FC, maybe a hybrid or something for Isaiah's rx8
To assemble the engine with a solid/long dowel, you can use an OEM dowel first until you have your mid plate on, then pull the oem dowel out and insert your solid/long dowel
I wish I was local so I could try and work with your crew, you guys are awesome.
3:00 She is just like my Cat. I saved her from starving and other bad conditions. That is exactly why I think that Cats aren't such poopholes than everybody says.
They are extremely grateful.
11:28 there's a Finnish company(?) that makes a pin+bolt that go in that port. The pin is machined such that it will peak thru the housing (and it's your job to face it) and the bolt locks it in place. I think it's Finnish, last i saw that mod it was in a Finnish video .
Just remember, with the same pump, a higher pressure means lower flow (think about blocking the output of the pump - no flow but the pump pushes hard pressure).
what a nice cat, I've had my 2 sister cats since kittens and they never show me love like that.... my lil dog does tho
Waiting for the 4 Rotor Dyno Tune and 4wd track shakedown. ! Keep up the good work!
Rob says he reads all of our comments. I can die happy now. Also, waiting for that hybrid rx8 motor to happen =p
34:13 6 rotor e shaft casually chilling in the background
A lot of Australian 2 rotors and even 3 rotors are semi pp or Bridgeport very common over here.
Rob, keep up the realness, one of the coolest dudes I watch on youtube.
You guys are working hard on this! So much to learn!!
USE A INDICATOR TO MAKE SURE THE HOUSING IS PERFECTLY FLAT BEFORE DRILLING/ REAMING! Very easy for a chip or hair to get caught underneath and you would never notice unless you use a indicator
Line reaming a whole motor together might be the move
Can’t wait to hear this thing run! Just rebuilt my engine with semi pp and fully machined rotors so I can’t wait to get to see what to expect when mines running!
Chip's way of semi pp blew my mind when I first saw it. Haven't been on social media in years, but I wonder if those are still holding up well
Rob, since you said you read all the comments, you should make a video on what semi pp is and the benefits of it. As always, keep up the great work.
Love watching & learning along side you two knuckleheads, keep up the great work!
Would love to see you add a manual lathe to the shop to be able to shorten your dowels and cut bolts, etc when needed!
Damn never been this early before, keep vibing and thriving Dahm and the rest of the team!
Always forget just how old Rob is til he says quotes like, “The canary in the coal mine.” 😜
Rob, if you interpolated the pilot holes on the CNC, I believe that would give you a better hole pattern for the dowels. I think the drill is always going to try to follow the existing hole (even a fat beefy drill). Where an interpolated hole would create a new center exactly where you want it. Then ream to final size. Just my $0.02.
front reg is 140 psi and a stock rear reg is 72FC ( 90 cosmo ) 110 FD. crushed and still with stroke then the FC reg can make 100. there is no need to mod a front reg . if you do you raise the pressure seen in the front hose and oil cooler when the oil is cold . mazda uses the front reg to prevent failure of the front hose and oil cooler turbidulators
More cat content please and sprinkle in some car stuff.
Rob an FD rx7 is my dream car and imma probably end up coming back to this vid when im rebuilding its motor
Thanks yet again for the content Rob and Isiah!
Also, it wouldn't be a Dahm episode without hearing 'Dowel' at least once.
35:15 Those alligator clip wire jumpers, (available in normal and heavy duty), are constructed to fuse slowly and not combust, (just lots of smoke), at 5 and 10 Amps. Use in parallel for higher currents. Pretty cheap and very handy for testing and dodgy set ups.
I had that happen except it was a crushed side seal. We got it all assembled and it wouldnt turn over. In your case it wouldnt have been obvious w/o your bench compression test to disassemble and visually check. definitely got lucky!
Man love all your rotary stuff. also it would be cool if there was a way to mate 2 four rotor engines together.. like 2 of em beside each other mated to something somehow, idk seems cool in my head .
They have gearboxes the can take drive from 2 different engines and combine the outputs, it's definitely possible
@@Matty.Hill_87 Then i hope someone out there is crazy enough to try and make it. would love to hear it
Twin Four Rotar
I'm pretty sure someone has done something similar
@@UnauthorizedFab some guy's got a "v"12 rotary, or at least used to like 4 or 5 years ago
The moment with Isaiah and the cat.... Well let's just say I'm buying some Dahm shirts keep it up boyz. See you at gridlife 😎
Always check any unusual noise. It will save you a lot of trouble in the long run.
I like it when you put the motor in the engine
I came here for the 4 rotor. I stayed for the super wholesome cat videos.
Rob builds the absolute best rotaries in the world
Also Rob: @ 30:50 don’t build your engines the way I do
I’ve been following you for too long to know you are a genius and master of this craft. If you add a washer, it is for a reason
Can’t wait for the production to start off
Long Daddy Dahm video, just what the evening needed
Rob needs a video just about the shop cats.
Rob. The auto flex plate bolts are perfect for blocking the oil injection port
Very nice billet front cover.
@19:30 future me almost always ends up despising past me for making assumptions like that lmao.
@ 25:45 the pregulator had me rolling cuz the other day I was thinking about how I wasn't thinking or speaking right all day and accidently said I couldn't "SPINK" right 😂 🤣
Hi, I'm Rob Dahm.
Gone are the days when I used cheap ass products like vasoline. Now I only use premium lubrication products from valvoline, because I'm worth it.
I’ve waited so long to see Robe semi PP, thank you
rob has some of the hardest car projects rn
Hylomar will react with certain types of rubber so that could be what’s causing your outer coolant seal to react like it has. Loving the content though 👌
Joel the true hero.
Rob. It is clearly time to get a second CNC machine so that you can work on you're semi pp's as you need to.
Bruh idk if that shop could handle a second CNC machine lol
@@snipinmonsta I don't know if he could afford that, I remember him talking about how crazy the first was, he had to take out a massive loan for it.
I vote that he gets a millturn/multiaxis lathe.
Yo, it’s that guy from that BBC video, he’s also on Top Gear 😉
You gotta give yourself credit for the things you know Rob, I know it’s easier on the mind to say you don’t but you know much more than most
Rob's going to make me buy a rotory at some point. I can already feel it.
I watch this channel because I know my day is coming for my original 1985 GSL-XE engine to be rebuilt, it has 150k miles on it. 😲
Love u man I need to make a rotary C5 to be honest. We need more rotary corvettes in the car community.
I would think the seals are being crushed between the housings because they are not fitting into the groove, but you could test that. Assemble one and go heavy on one plate and not on another an see if the heavy one destroys the seals. Never have to run it so you don't even need rotors in it to test this.
After all your videos I'm pretty confident I could rebuild a rotary if I ever have to
Oil pressure relief in e shaft is for start up under extremely low temps. It will prevent oil pressure spikes.
That's mainly the job of the front cover by-pass valve. The thermal pellet was added primarily to decrease warm up time by lessening the oil cooling spray inside the rotors.
The valve itself is spec'd to close at 60C. While it might act a little like a pressure damper, that's not the primary goal of any thermostatic valve.
I hope your bearings are OK after putting all that shock force through them with that impact.
I daily use an old, warn 9 inch disk on my DeWalt 5 inch grinder because it's 6+ inches and I need the extra depth. I will never use a guard. The disks stall or explode often, taking out lights on the ceiling... but I never get hurt because I don't hold the angle grinder incorrectly! ...and yes, I've been doing this for more than 10 years without getting hurt from it, but I always wear a baseball cap, thick leather gloves and safety glasses, always! Gotta protect ya'self from falling light bulbs :)
F.Y.I: 9 inch grinder is fatter and the 9 inch disk will not cut as deep as a 7 inch disk on a 5 inch grinder.
This is my rotor. There are many like it, but this one is mine....
This is my rotor, this is my gun....
One is for fighting, one is for fun...
Rob need to make a T-shirt that say”Ugga Dugga everything”
@Rob Dahm. Adjusting the relief pressure to your oil system for higher results may add an additional force in the mechanical efficiency of the engine and potentially reduce engine power!
hey bro . build it with stock dowels and pull them out one at a time and replace with a solid when the last housing is on
Whenever You See Robs Hair That Messy It Only Leaves “1” Of “2” Possibilities Either (Glorious Rotor Things Have Been Learned) - Or (Something To Do With Semi PP’s).. Either Way Great Work Rob..👏