How to rebuild a Rotary Bridge Port engine ~ fullBOOST tech files
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- čas přidán 23. 08. 2024
- FullBOOST Tech Files, Ep 1 ~ Rebuild and Bridgeport of a 13B rotary engine @ Mr Parts.
We have started with a stripped down 1984 Mazda RX7 13BT engine, and will run through the steps involved in bridge porting the engine, then assembly, to the start up in its new home, a 1972 Mazda 808 (RX3).
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#rotary #13b #enginebuild
Having only worked on piston engines, this was very enlightening. I had basic knowledge of the internals of a rotary but now understand what makes a 2 and 3 rotor engine. You just gotta love the simplicity of it all. BTW, nice RX-3, as it is known here in the States.
Just watched a whole rotary being assembled and they STILL seem like black magic.
And they quite reliable too
Wow. This was a really REALLY good rebuild video. Wasn't all over the place and confusing. I feel like going out and getting one just to rebuild now. lol
Mate, feel the same.
I have an s2k that I daily yet have always loved the rotary engine.
Would need to be a secondary car as I couldn't cope not getting to work in the case of a rebuild.
If only funds weren't an issue. :)
4.57 S2K
Buy a focus se. lol. Bullet proof little cars with a manual trans and if you get a CVH do the valve seats and you'll see 400k before you know it.
OMG! Thank you! Such a nice build video. I used to have a 1973 Mazda RX 3 Wagon that the previous owner cut the roof off of, because he wanted a convertible! Soon after doing that, he discovered that the vehicle flexed way too much without the roof , so he had his local shop weld in a custom full roll-cage. Then he had the 12B rebuilt for high performance and did some minor suspension work. It had a Wink Mirror and DAMN! that thing was so much fun to drive, especially in the early eighties when the congestion wasn't too bad... Rotaries love to rev, not like pistons that have the whole: up, stop, down, stop BS. Rotaries, once they get going, just want to keep winding up. I remember the over rev buzzer all too fondly and miss my old, what some had termed, Road Warrior Car...
Rotaries Rock!!!!
keep this guide, because you will need it every 40,000 to 75,000 miles!
got 160000km at my last build buddy
@@seanstrange69 still nothing to brag about...🤪
Unfortunately you are correct...
awesome video, i love your in depth videos with engine builders and narratives, showing the portwork and many internal parts of a rotary i did not know existed, also filling alot of blanks, thank you for taking the time! as always!
Sloppy Mechanics hi Matt
I've watched a bunch of rebuild video's and this one is easily one of the best! Awesome work guys!!
itd be cool is this process did actually take 24 minutes and 12 seconds.
You can rebuild one and put it back into the car in a day if you know what you're doing.
Only if you want to blow your tips off
🤣🤣🤣
@@boblecocojames you give us hope
I'm Old School Rotary Junky And This Video Is Well Done!
Fantastic video! I think this is a great addition to your channel, straight forward, easy to understand and to the point. I really hope these videos take off. Great work and thanks!
Thanks for the positive feedback everyone. We'd like to do more videos like this.
@ 22:49 you can hear why the rotary never "took off". Don't get me wrong. I absolutely LOVE these engines. That sound you hear is actually the engine losing a LOT of it's compression when the apex seals hit the plug holes. Fantastic video! thanks...
THANK YOU,GUYS...Making it easy for those that we LOVE Rotary....
Best video on engines I have ever seen
Chris McEvoy thanks, we have a few more coming, and hopefully by the end of the year we will start work from scratch on a project car so make sure you subscribe to the channel!
+MrParts_RotaryRaceCars
No, you was very disrespectful to the other guy above asking about the seal.
We will not subscribe to people like you who think that they are entitled to mistreat people whenever they feel like.
People, look for aaroncake here on you tube, he has a very good series of videos about rotary engine rebuild.
+Juan Cabeza
*you were
matt williams shhhhhhhh... kid
juan cabeza Lol sissyboy don"t get your panties all bunched up in there.
YES! More of this kind of stuff Fullboost! Can never have enough rotary!
Great video. Nice to see a motor put together and explained how and why it was done.
Please make more instructional videos like this, I think these videos provide a lot of in depth technical information for motorheads like myself
Watching this makes me want to install a rotary into an old pickup with a failed engine just to have some fun. Thank you.
This is a great resource on bridge port. I always hear about bridge port in rotaries, but knows nothing about it. Now i know! Thanks!
What a marvel... Lots of delicate looking seals...I know they work well but Im still surprised. All in all definitely fewer parts than a normal piston engine. I really need to pick up a 13B or two and marry them together... This looks very easy and my understanding of the rotary has moved a bit further because of this engine rebuild video....and you just GOTTA LOVE a rebuild video that ends under the hood and running for us...SWEET... Nicely done!
That engine sounds so sweet! Can’t wait to get my own one🥰
Thanks for posting this. Always wanted to see the rotary engine dissected.
bloody awesome video guys. Thanks so much for posting. Watched it all the way through.
Awesome video and beautiful vehicle!
Nice video, thanks!
However - for clarification to anyone not aware...
When installing the oil control rings into the rotor, the notch side not only needs to go down, but the notch must align with the squared tab end of the spring.
You were clear about the other side - the rounded end of the spring being positioned into one of the small holes in thew rotor, but you did not mention the notch needs to align with the spring as well.
Thanks again for sharing!
Thanks for putting this video together, its been really interesting to watch.
man rotary engines are cool, I so need to try one of these babies out! Thanks for sharing this.
That was really cool! I have always wanted to see how one of these engines is rebuilt. The car that it went into is very beautiful and I love the paint color. Thanks for sharing
Thanks for that. I've always been fascinated by the 'other' type of engine but not had a really good understanding of how it is put together.
learning about this motor in my highschool shop classroom with our teacher mr spaulding was awsome
Dang, lucky
This was absolutely the best video so far!! Great job!
This was very cool! Never knew how these motors worked. Thanx.
My first car was a first gen rx-7, i also got an A+ in "advanced" auto shop class in hs for rebuilding an engine for it...
I remember how much "fun" getting those seals in place was, the corner and the side seals were a serious pita.
Back then (96), there was not nearly as much available as there is now, however i spent lots of time browsing those mazda trix catalogs dreaming...
Makes me almost want to pick up another one of those cars.
And i think transmission assembly gel would work much better holding everything in place when assembling. ;)
They even have different grades depending on how much hold you want vs temperature.
That engine sounds so good
Excellent video,I was facinated and at how intricate these things are!
here I am at 5am watching someone fixing a rotary engine
and I don’t even own a car.
outstanding work! also that is one of the nicest sounding engines i have ever heard..
@fellowship of the goat, The Corner seal and Side Seal run along the Bridge, If you had one big port in the side the seals would fall in and it wouldn't end well.
For the novice rebuilder. Sideseal clearance is 15-40 tenths (.0015-.0040,) not 15-40 thou. (.015-.040)
Love to know the power numbers this engine makes.
I built a model Wankel long ago, even read a book on them, great idea, but it was never intended for making huge power numbers, glad some do.
Not in the rotary engine crowd but this video was very precise and detailed!
Good instructive video. Suggest removing the pressure relief valve from the front of the E shaft and replacing with solid plug as most of your extra oil pressure will just vent off there. Don't want to add pooh to your ointment lads, but while the external port profile is good, the internal profile of the bridge port is crude. It sounds great at idle but doesn't bump up the hp of the engine as much as it could. Most of the intake charge will rush past the b/port and go through the main port anyway. Trick is to redirect an even higher percentage of the flow through the b/port. Thats all for free ;o)))
Awesome video! It was really easy to understand the process.
rotary enige sounds very clear nice done
My dream is to fix and build rotary engines. They don’t have any big names shops here in New York and I would love to start helping people with their cars.
that was one of the best things I have seen on CZcams for ages.
Have you guys got any other porting videos
I could watch shit like this all day!
Amazing!! These engines are much more simple than a piston engine I like it now you need to do a video on how to turbo one of these
Thats bad ass man. My first look inside a rotery. Who ever came up with that kind of motor idea was brilliant and eccentric. Seems like it would take a bit of a twisted mind to come up with that and then make it work. And you can beat the living piss out of it too.
It's probably more simple then it looks once you know what your doing and done it a few times. I wouldn't mind having one to play with
+starbattles1 Rotary engines are fantastic to work on, because they are so simple. You will work on them quite often however :)
I like some of the puns you used there haha
+patto505 lol
Wankel engine. If I remember correctly, Felix Wankel was his name.
Wankel... this is a Wankel engine..
Now I feel comfy buying the rx8 thanks man ^^
the rx8 is poop. it's extremely slow for its sporty pretensions. And takes a bunch of $$$ to make it anything near quick, which only makes it even less reliable. If you want a rotary, but think this is a ton of complex work you don't want to deal with. than in reality you actually don't want a rotary. the rx8 drivetrain is not reliable and requires constant love and maintenance to keep it happy. even in stock configuration. Plus God only knows what the previous owner put the car through and how well he maintained the rotary. Like I said, if you want a rotary for whatever reason, but don't want to deal with headaches owning a rotary can cause. than take my word for it you don't want a rotary lol.
+Mike Labonte whats with the hate ?
+cok Bagus I currently have a vw gti but I'm looking to buy a non turbo fc3s soon, and doing my research on these. I do notice much hate on people who own a rotary, I don't understand either, they seem fairly simple to handle if you know what you're doing.
Mike Labonte have you even owned one?
That' looks even less complicated than a 2 stroke.
Thats exactly what I just wrote in my comment, about 3 or 4 comments up ☝! But that is so true! I feel like I can build a Rotary after watching a couple people building them in different videos. The ONLY place where I would get mixed up at is when you have to start adding all the parts that attach to the engine, Like the A/C and all that, but even that looks slightly easy... depending on what your adding, because this is a clean N/A setup. But yea man.. . . I was thinking the same damn thing!
Nothing is less complicated than 50cc 2 stroke
@@ViceVersaMusik1 haha the assembly is easy its the measuring of all the tollerances on everything.... otherwise engine will not last and fail
*Today marks the 7th anniversary of the end of RX production, on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.*
You really dislike those engines hey? lol
*Not at all! I love to collect old antique and obsolete engines*
Always thought of the Rotary as a "air and fuel goes in, illuminati and brap brap happens".
Learned a lot from this! Thanks a lot :)
You didn't finish that,
Gas and air go in,
Illuminati, Doritos and brad brap happen,
And Apex seals come out.
modwlego
From what I`ve seen, apex seals come out when idiots add random Stage 3 shit, start turning up fuel and boost with zero fucks given, then they go balls out on the throttle 95% of the time they drive the car :)
Not to mention all the drag-strip rotary`s live a pretty harsh life as it is (almost 100% on full throttle).
Take a healthy stock engine, add moderate boost levels, be mindful of when you floor it, and it`ll last as long as any modded motor.
+ToreDL87 so, if we look at all the RX-7 drivers on the road, profile them, and determine their driving style, that means the amount of engines that are going to blow every seal in 10k kms is about...
All of them.
modwlego
:V Sorta cant argue that can I... I dont own a RX7 :P
Awesome video. You make it seem like anyone could go do this easily
would this build be the same for the rx8 engine?
Yup, I'm thinking of doing it myself too even though a shop I found, was charging me 800 which is not bad but I like trying new things!! With this video I'm sure I would be able to do it I just wouldn't fire it up. Unless it was getting tuned right away.
Brilliant Video !!!!
I really enjoyed that and it sounds amazing
Great vid! suggestion, use a press for bridge porting & follow up with dremmel router. that way you get crisper angles & then flute edge. Flute like 01°. Does that make sense the way I explained? I use rotarys geared down for my aircraft.
The best tutorial ever!!!!
Thanks for the info, especially regarding the D-shaped exhaust port. I suspected that would be the best design, but I wasn't certain. I was also intrigued to see how you milled the faces of the rotors to prevent scuffing against the housings at high RPM. I plan to use this info to modify the tiny rotary engine in one of my RC cars...if I ever get that car up and running in the first place.
I have a question, though: Are the scoops in the faces of the rotors really the best way to transfer the fuel charge from the cold side of the housing to the hot side of the housing? Or would it be better to have channels cut into the housing at the point of maximum compression, and use non-scooped rotors instead? It seems like non-scooped rotors would do a better job of thoroughly evacuating the exhaust gases, and also minimize port overlap regardless of the port design.
Rotary Engines Dont Look To Bad To Build, And The sound of a Ported and Bridged Rotary Engine is just Priceless! Theres No Other motors that are like a Rotary! Thats why they are worth owning in my opinion. Id Like to buy a 20B and drop it in a Mazda Miata or a Honda S2000 because there really small cars and I just think a Rotary would look good in those engine bays, and sound nice too.
Awesome vid! Wish I could get a hold of one to play with.
Top job mate.. Clean and organised..
Very Informative I've always wondered how they seal the combustion chamber & now I know, Thank You. I'm a Valiant-Holden Man Myself & A Firm Believer In "There's No Substitute For Cubic Inches" But Credit Where Credits Due, Rotary's Are Bloody Awesome & Theoretically There's No Size Limit For Rotary's, I'm Also A Firm Believer In Extreme Power & Revolutions, Interesting?
AWESOME.... more like this
Excellent video guys, a mine of information. Cheers, I feel my upcoming rebuild is in good hands now!
Still done by hand?? I thought in this day and age it would be done with a CNC machine
Bravo
Nope, HEAPS of rotors are still built by hand exactly like this.
Fullboost Must be some talented blokes around
piffiiiiiiit people who love their jobs i bet
i'd love to be a machinist, the art of porting and angle grinding is just awesome. especially when you see how a minute angle difference in a grind job can make such a difference in some cases.
All you gearheads stay safe. Just here to show some love. Greetings from Houston, TX!
Michael Gedies There's a lot of work available for machinists, you can make a good living at it, too... especially if you save up enough money to get your own equipment and do it on your own. I think 2-axis CNC plate work usually runs us $60-80 an hour if it can't be done in house unless it's really big and needs to go on a boring mil. The sky is the limit then.
Great video i really enjoy it and learn a lil bit more about rotary engines
The tail lights are 🔥🔥🔥🔥
Fantastic video. Thank you for sharing.
Would it make sense to tape off the rest of that plate while you are machine the port so you don't accidentally scrape it up?
Oh... and here I had always thought building rotary engines was complicated...
Crimmy Sun Most things don't look complicated when done perfectly for a video. Ofcourse, they're professionals :P So an individual would have more trouble.
Wow such doge Nope, tore down and assembled one, it's really just that easy lol
Crimmy Sun How'd that go? I'm a beginner rotary guy and im trying to learn every possible thing before buying one, which i will then rebuild to ensure longevity of the engine.
It's honestly quite simple, if you have any experience with building a typical piston engine, you've pretty much over qualified. All the piston engine aspects are present in different ways. if you do a bit of digging on the parts and their purposes, you'll start to draw a lot of parallels and the dots will begin to connect. It also doesn't hurt to have a friend that explains things here and there when you are unsure of something.
Crimmy Sun hey bro, i'm also a beginner in rotary., there is no workshop at my place are able to restore rotary, so i'm going to restore it by myself and learning it from the internet., is there any differences between stock port and bridgeport? how about fuel consumption and what is better if i'm going to use it for daily use
sweet video, guys.
How did you degree the cam? How many angle valve job did you perform? What is the ratio of the rocker arms used? Sounds like a mean V-8. :-)
LOL, I know.
It's the roller rockers and cam with the two huge lobes that does the job!🤣😂🤣🤣👍
Beautiful engine, beautiful car!!
Excellent video and description! You need to show is how to do PP rotary now please, thanks.
Great vid guys
0_o I'm speechless. Rotary is an art to rebuild for damn sure. very good walk-through video.
Badass instructional video, very detailed
Have you had any issues running 2 piece apex seals with notched rotor housings?
Most of what I've read say to use 1 piece seals.
Thanks for posting this, very few builders show the porting process.
Do a 20B Turbo build next :)
You shape the exhaust ports to minimize overlap on a bridge port?! I may be being trolled here and not getting the joke but the bridges basically mean 100% overlap regardless of exhaust port closing timing. That's um, one of benefits and side effects of the bridgeport. And then later in the video clearancing is shown because the customer likes high RPM, so attempting to eliminate overlap really doesn't make any sense because that's what's going help make that high RPM power.
Well it still effects overlap, so maybe instead of 150° it has only 145° overlap :P XDD
massive fan Aaron. I'm a die hard subscriber. Waiting for your next upload man.
Verum Quaerere Seek Truth aaroncake same here aaron video's rocks watched every single one of them
Aj Dosa SAME HERE. It use to be my daily routine
Mostly cuz this is a boosted application. You don't want too much overlap or reliability hurting stuff done.....that keeps boost in the "cylinder"(cant remember what its called in a rotory cuz it's early lol)and reliability up at high rpm
That was the most gangster video I've see all day
I watched this video once and I convinced myself to buy a fd rx7
WOW so interesting, never ever seen a Rotary engine before and I can't believe how physically small they are .
Im now wondering why they aren't used in Kit cars like the Caterham etc
nicely explained video...now i want a roatary engine to disasemble and put together again :P....didn't know they were that simple... :) have done some disasembly and reasembly of volvo enginges in my early days.... :)
they are not as simple as you think...
it takes alot of time and patience
They are simple just tedious
What ... no burnout ? : ]
Haven't seen an 808 for probly 20 years here... thanks for the memories
That was awesome !
No need for assembly lube then just straight Vaseline ??
Instead of messing with the oil dif, can i just premix as well?
Such an informative video. Cheers guys.
Fantastic video . Thank you
Would you recommend having a professional do this or would is it ok for someone that is mechanical inclined to do porting by themselves using a template from Atkins Rotary or Racing Beat.
Good advice a dremel unbelievable lol
Hi. I have just bought a mazda RX5 -77 and i'm going to overhaul the motor, i wonder where you recomend buying all gaskets and apex. Thanks!
Rickard from Sweden
THE FOUR STROKES OF A INTERNAL COMBUSTION OCCURS SIMULTANEOUSLY IN A WANKEL ENGINE THIS MAKES IT MORE EFFICIENT THAN A PISTON ENGINE
Question.. if the impact on the Rotors is at the upper/lower part of the rotor near the apex seal why would you not clearance that part of the Rotor as well ?..Racing Beat does clearance the upper section only. I would think it may be prudent to remove some material from the whole surface..let me know what your thoughts are ..Thanks....for sharing your video..
excellent vid, first class !!
this is the first guy, who knows how to fix the screws in a motor. In X cross to get same pressure at the whole part. And!!!!: use those bolts only one time! Guess why
Outstanding video cheers
Very good excellent very good 10/10 👌