The TRUTH About Building and Owning a 3 Rotor 20B Mazda RX7

[@KennyatHumble]

This comment section teaches us all that the people that know the most about 20B engines are the ones who have never touched, cannot afford, nor will ever own one. Lots of internet experts here. Let me remind me you, every single RX7 with a 20B in this video was built by us.

[@Mitch3343]

But but but. I read it on the forums. ;)

[@IllPearce]

Hating Finding A Username 😂😂😂

[@Dominuce]

Can you please DEBUNK this video kzbin.info/www/bejne/o2TTdH-gfb-gnq8

[@donmerrigan2362]

Rotors Magazine there's a guy in another videos comment section cursing at and telling everyone that he can find a complete 20b swap for 5k. This even though the cheapest 20b on eBay right now is 6300 including ECU and wiring harness only.

[@alycestapleton]

Rotors Magazine i live here in oz or Australia outside of japan Australia is one number in rotary engine been doing them since the early 80's many years before anyone else around the world even i have worked on them indeed they cost alot most of my mate here had or have one they spent more time at the workshop then driving them

[@brandonbayon8100]

This made me appreciate people with 20B engines even more. Respect to all the Rotary owners who ignore all the risks and seek enjoyment

[@sandervanderkammen9230]

The 20b is definitely NOT a performance engine, it was cobbled together for a failed luxury car...

[@sandervanderkammen9230]

@Chris Farley Both companies have a reputation for low cost, entry-level cars targeting first time buyers.. Nissan launched the Infiniti brand with limited success but remains viable in some markets. Mazda's reputation is definitely on the low-end market and it's attempts at launching luxury brands such as Eunos, efini and Amati have all been failures.

[@bobspence5322]

youre a troll that has no appreciation of the superior rotary engine.

[@gwrcpa]

Hey everyone. I have a 20B 3rd gen RX7. I highly recommend if you are going to do the conversion that you push the transmission back 3 inches and get custom drive shaft. This is because the subframe that people normally use does not allow the engine to be back far enough and the power steering rack needs to move too much. Basically, I had the subframe kit and the car felt disconnected. I spent an additional 3K to move tranny back and it made all the difference. The car felt like stock again and handled way better.

[@darthkillstealer3181]

The cosmo gets better looking with age.

[@KennyatHumble]

agreed

[@lordcanti2921]

Brad Webster you guys down to help me snag mad miles rx7.3 cause that is the most gorgeous car ever conceived

[@mikezoller2673]

I would love to see a video explaining the process/cost of importing these cosmos! I've been contemplating pulling the trigger on one for the longest time, but I don't know what to look for.

[@MajorMatt79]

That is so funny you said that, i have loved rotors from day 1 but thought the Cosmo was ugly AF back in the day, i haven't seen 1 for a while and i actually like it.

[@jonnyindianajd]

I had a 76 Cosmo in about 1990, fully loaded, power everything 5spd white, red and blue trim work. I was young, had no money, so wished I had it now. My step dad had a early 70's Rx3, it was about as fast as his 65 hypo 289 Stang. I was really into rotaries in the mid 80's in the Silicon Valley. Ron if your reading this, it's John, Scott's friend, summer of 85, San Jose. At any rate, a Cosmo would be would be the Pinnacle for me, not an Rx4 or a Rx7. The only other would be an Rx3 SP. Not that that would be all that, it's just a cool old sports coupe from Japan. John from Noblesville.

[@howardjames7559]

When you slightly mis-stamp a "B" on a block you get an "E"

[@TheForcedinductn]

Great video but don't forget about us FC RX7 owners, the FD wasn't the only RX7 ever made :)

[@KennyatHumble]

FORCED-INDUCTN only true RX7 ever made :)

[@TheForcedinductn]

Wouldn't that be the FB as it was the simplest and purest?

[@TonyToretto25]

No, because the engineers couldnt get a watts link right on such a primitive suspension design.

[@bluecollarjose]

I seen a fb featured on 1320 videos. The turbo bigger than the motor. Highly modified of course.

[@KennyatHumble]

#freecody yeah you're swimming in subs lolol

[@dj4monie]

Thank You for the video, very informative. I never thought a 20B would be so expensive to have a reliable and powerful car based around one. You are right, the internet make you believe they are grown on trees but that isn't the case at all, very involved and expensive. Even more so if you don't have an RX-7 already...

[@Slays_Media]

My dream car is a naturally aspirated 20b swapped fc3s. Since rotary territory is foreign to me aside from what I read in forums and see in videos, I already figured it would be pricey as hell to have a clean and reliable setup. Since this video cleared that up for me, I'll definitely put that idea off until later in life. In the meantime, I'll just stick with an sr20 swap. 😆

[@rogerdavis2056]

A long ,long time ago a friend of mine had a rotary truck after that ride I bought a 79 rx-7 got it running a then the rotary bug hit me! Previously I was into V-8. I have had 4 rx-7, one rx-8. Time to get another one! Great video, Thanks.

[@angusjoejohnson1036]

I have 2 20B converted FD cars and I can tell you it is really cool but truthfully you can make a 10 second 2 rotor on pump and water meth a whole lot cheaper. That being said, the sound of the 3 rotor is intoxicating and will last longer because you run less boost. The torque is also a huge plus. I suggest doweling and running a smaller turbo on the street. I run a BW efr 9180 on water meth and the car blows the tires out in 1-4 gears. I see 15 psi by 3000 rpm.

[@177SCmaro]

Swapping engines is more expensive then a lot of people realize. Just swapping a basically stock rebuilt 2zzge and C60 into a Celica GT cost me around 5500-6000 (the cost of the engine, trans, clutch, ect.) and that was doing all the work myself. And that is an engine Toyota designed to go in there.

[@joserotary9636]

I've been a rotary guy for years but do to $$$ and a single parent now I own a 92 hatch civic so, like the vtech technology, just subscribed to the channel, keep it coming.

[@RX7FDfreak]

Been considering a 20b swap in my FD for quite some time since its my favorite rotary. Glad I found this video to better prepare myself, thank you!

[@genya3162]

so howd it go?

[@Happymali10]

Thank you for this video. In Germany the rotary-community itself is tiny, and 99% of it is "if you change the wheels, you're a monster and belong in jail". So there's NO solid knowledge on 13b/20b-engines, swapping them or modifying them. Only a lot of "I did it kinda-sorta" or "If you do XY it should...."

[@JohnCherubin]

i want a 20B when i finally get an RX-7 but i know its not easy to find plus expensive...this video broke down the cost and time needed to do the job right. Great video!

[@willthacker5182]

20k! Wow...I'd do it if i had a fd sitting in my driveway w/20k in the glove box. Rotary's are pretty awesome though. I prefer piston engines, but being into all things mechanical, im definitely intrigued by the rotary. Theres a reason why ppl put them in small aircraft. They must not be too unreliable.

[@KillaRock404]

One day I would love to put a 20B into my RX-8. Just give me a decade or two to save up lol

[@chrismccreary2976]

KillaRock404 I don't care for the RX8 but that's a freakin sweet idea man. That'll be maaad!

[@worldhello1234]

Do you really live in a 3rd world country? It is just the price of an average new car in the west but still expensive. :)

[@kayceebrooks1428]

An average new car is going on a 3 or 4 year financing term, you're not typically going to finance a 30 thousand dollar project. It's already a bad idea financing a depreciating asset, it's an even worse idea to finance a depreciating project.

[@k9forkids]

or you save up a couple of month and add an junkyard 5.3 with a turbo and just do it instead of sitting on a couch dreaming about $30K Rotary builds. To many people are dreaming about the exclusive and most exotic builds, instead they could go with what is cheap and available and go out there and have fun.

[@KillaRock404]

To me putting anything but a rotory in a RX is sacrilege. Yes swapping a 3 or 4 rotor into anything is going to be time consuming and expensive, but it's not about the money if you go that route. My dream is to have a 3 rotor RX-8, sure it will take time (I"m fairly young and I need to do a couple things before I can get just spend 30k freely like that), but it would be my ultimate car goal. From my research, LS swaps cost about 20k+ so why just go for it with the extra 10k? I know you can fit a turbo with a 3 rotor into an engine bay. Can you even fit a turbo if you LS swap it?

[@kevinhartley4521]

Your video showed me that these builds are true commitments. I love the sound of these engines. Thanks for the education. Beautiful car also.

[@victornishimoto6029]

Hi, I love your detailed stories! I'm kinda that "other guy" Having a Mitsubishi evo x gsr, I went online ready to build. After purchasing my volk te37rt in magnesium blue, I spent another $11,500.00!! Dollars on a one of a kind (in USA) Elmer racing cnc forged 4b11t billet race block and prototype head plus a custom billet valve cover. Now that I have all the major parts... I now dont have enough build the darn thing!!!! Thanks

[@BuzzzdLightyear]

How about a video on how expensive/capable 13b builds can be? I know they have a lot of potential but people overlook them for the 20/26B.

[@michaelbrown9031]

Great vid. A lot of food for thought and a massive damper on my 20B plans haha. Will always be the dream. Keep up the good work, really enjoy the channel

[@tscooter22]

Original FD (95% stock) owner here. 'If' I were to do a 3 rotor swap (no way would I do it) I would make it NA. Hell, I'd even consider going old school with a carburetor. I don't want 700 hp, but I do want a reliable power plant without the complications and heat of a turbo. I'd be fine with ~300 wheel hp and the advantage of consistent throttle response you get with an NA engine. I like to drive the backroads and the track, not race on straightaways. The stock FD has plenty of power to get you between the turns on public roads. I had a 91 Miata before I traded it for the RX-7 and had a blast backroad bashing with that car! The original 12a and 13b RX-7s were much more simple back in the day! I'm not a big fan of all of this computerized crap. Simple EFI would be fine for me too. Nice video, btw. Thumbs up and subscribed.

[@theonlym12]

great video. it gets annoying when people always say that to me. "3 rotor swap it bro" -__-

[@Dylanschillin]

theonlym12 hemi swap it lol

[@worldhello1234]

Nope, that is only for cheap fuckers or people who don't take care of their rotary engines.

[@worldhello1234]

Nope buddy, do it right and order some fancy 4 rotor from PPRE. It is 30 grand+ but muricans have no problems to indebt their sorry asses for decades for a new car, so it is not that bad. ;)

[@KennyatHumble]

Red Phoenix be careful, if you’re not a big name PPRE with give you a half assed engine.

[@richardprice5978]

Blacksmith Lewis how about all of them 😏 just not at the same time on the road. By using different subframes 😏 that fit the same car

[@Rickybobby702]

Have an Evo myself but thinking of making that switch to rotary powa!!! Thanks for all the info and I will check out your shop online. 🙌

[@b16snv]

Thank you for this video very informative! All the answers I've been looking for

[@MJTAUTOMOTIVE]

Hi Kenny, Thank you, someone finally told the history of the 20b. I get the the same question about is your car 2 or 3 rotor. I Should have my RX3 12a Bridgeport with 48Ida finished soon. I will try and send you some pictures or videos if I can workout how to do it. Thanks for the cool video. Cheers from Queensland Australia. Mark Thomas.

[@nodcarillol.6550]

Rotary owners are some of the most geekiest in the car community. Respect

[@tgracing5532]

Just embarked on my 20b d-series built motor into my fd with tremec t56 magnum behind it... cannot wait but yes this vid is correct they are not cheap it will be around 50-60k with the car purchase excluding paint when finished... Great vid

[@kevinlynch8239]

Excellent discussion on the rarity and high costs of 20B engine installs in the RX-7. I also was unaware of the 20B A-E build numbers and early iteration problems. I will attend more of Kenny's lectures before I commit to a swap.

[@1truzilla458]

He's right about everything he's saying. I've got a 20b in my FD And I've spent in total 40k. 16k of that was engine. I'm still not running right. And on top of that alot of people don't know what there doing. So everything he's saying is correct. I'm actually finishing my other build of my skyline and that's been cheaper to swap a RB30 into that than my RX7. I'm going to finish that and save up and send it out to maybe rotors magazine.

[@KennyatHumble]

If you need help, hit us up on facebook. We regularly build 20Bs, every FD in this video was built by us.

[@1truzilla458]

Rotors Magazine cool. The motors in the car, it's got a custom t56 transmission, BW S480 turbo and custom 8.8 electronic locking rear w/ driveshaft shop axel's. I'm just trying to get all my parts back from the mechanic that was working on it😒😒. One of those deals were some of my parts went missing. After I finish my Skyline I'll give you guys a shout! Thank you...

[@DomBeal57]

best of both worlds you have... skyline and fd

[@1truzilla458]

Dom Beal yea my friends say my garage is like a video game lol. RB30 Skyline and 20b Rx7.

[@hansorlich6406]

Rotors Magazine Do you also build 26B's? If not, do you know who builds these?

[@deftonesfan81]

Very excited for the cosmo build!! Cant wait to see what you do!

[@kwtc6134]

When people ask if my rx7 is a one rotor... I hope you can understand that feel -_-

[@KennyatHumble]

Yep.

[@Mortalomena]

didnt the earlier ones come with 1 rotor also?

[@KennyatHumble]

No.

[@johnqiu1659]

Mortalomena roasty toasty

[@asomedeadmou5]

KWTC i think there have been a couple of bikes with 1 rotor engines

[@TriniRogue]

Awesome video, a lil exaggerated on some pricing points but i can get behind that as its necessary to show people the extreme that they may end up in if they arnt cautious, also VERY!!!! VERY!! interested in a cosmo build jesus i been waiting to see this forever :D keep up the great work man.

[@KennyatHumble]

It's not exaggerated. In fact, it's very much on the low end.

[@Piotr94L]

I hate 20b swaps, because of that Mazda Cosmo has to go to crushing machine.

[@AGGINYZARCENO]

False...there are companies that make long blocks.

[@doktorbimmer]

*But those would not be real 20b engines... they are after market replica engines.*

[@KXP70]

@@doktorbimmer there's nothing wrong with that

[@doktorbimmer]

*There is nothing relevant about it either... the are several small shops that specialize in custom building replicas of obsolete or antique engines... because these engines like the Mazda 20b are both rare and no longer available.*

[@Happymali10]

You do realize that a lot of 20Bs come from cars going to the scrapper anyways, and that, in some countries, you can also put a 3-rotor together yourself/have it put together, or extend a 13B.

[@francischazz9496]

Yeeeesss! I've been looking forward to this build and can't wait to hear more about 20B's and etc. sick Cosmo pickup. looking forward to that as well! cheers! PS. this vid was too short.

[@peterdelgado1223]

I'm thinking of putting a 13b in an MX-5 i think this build would be alot cheaper. Smaller car, smaller engine and miata's are very light and balanced.

[@djdeertz5450]

Damn only 5,000 20bs made lol. Makes them all that more special. I figured more like the 10k range of production numbers but damn was I wrong. Wonder how many are functioning.

[@christianVSR]

Thanks for putting this together. Good insight. What is your opinion on the JC Cosmo? They've always been one my of my favorites. I've been trying to inform myself as much as possible on these cars. I look forward to your videos on them.

[@christianc1562004]

Great video. Do one for the 26B? That's the one I'm really interested on.

[@KennyatHumble]

I have no direct experience with a 4 rotor. But I have people in my contacts who are, perhaps!

[@KillaRock404]

I've heard that 26Bs can cost upwards to 100k just do do right. I think I read that somewhere on RX8Club or RX7Club

[@christianc1562004]

KillaRock404 I'll be honest...I think it's well worth it lol if you have the pocket change that is.

[@KennyatHumble]

David, the guy we featured a few videos back, spent well over $100,000 on his 4 rotor FD.

[@KillaRock404]

I'm with you. The sound alone makes me want to do it lol

[@michaelhooper2888]

Bro in New Zealand you can pick up full front end of of cosmos with 20bs for like 5k and that's 3.6usd that's with every thing except engine mounts

[@KennyatHumble]

You also have to deal with freight shipping and still the motor rebuild as well as customs and moving the car from port. If you're in a port city, it might be chaper, but you also have to do more work to get it there.

[@michaelhooper2888]

Rotors Magazine yeah nvm but in New Zealand u can drive anywhere and pick it up it's only a 2 day drive from the top to the bottom and so many were imported New we have so many I know of 3 20bs around me a na fd a Mazda Luce and a Nissan laurel

[@wankel84]

Yea its probably alot cheaper for you guys, you guys are surrounded with them lol.

[@followthegrow108]

Michael Hooper fr this guy is over pricing everything

[@followthegrow108]

Rotors Magazine youre wrong.

[@GBrai-mu5zy]

Thank you so much for speaking the honest reality of it.it is needed.

[@Javierm0n0]

It's awesome u picked up a Cosmo! Can't wait for that series.

[@johnnnytsunami5479]

Can you make a video about the 4 rotary motor? And can you also make a video showing your shop? And can you guys build a 4 rotary engine? And if I'm you guys are up to it, can you make a video of N/A vs. Turbo rotary builds? I just saw your page and want to know as much as I can about the infamous Rotary motor.

[@ramonvilla4682]

Awesome info. I knew it was expensive to do cuz i have a friend with a 20b fd and i asked him but now i know why its expensive.

[@phoenixrising7047]

I say you guys drop another one seeing as theyre not making them anymore and we'll all go in there and clean them out.

[@ardyshane23]

Cannot wait for the cosmo build. Someday I will do a 20b, but na. Like you said it's the holy grail, and only a few drop the cash.

[@ravindersingh3901]

E Series engines were never issued in the production of the mk1 and mk11 cosmo, there was a recall on the weaker engines and they were supplied with the E type 20b..

[@joshstane5926]

I’m pretty sure the late rx-7’s in Japan came stock with 20b’s.. after they discontinued in the US, they kept up production in Japan for a few more years and put 20b’s in those. They also kept the 13b but some came with 20b from factory. From my knowledge of course, I could always be wrong.

[@EK-rr2md]

No rx-7 ever came with a 20b, even in Japan.

[@PeloMR2]

Wow I didn't realise you're a pro with rotaries! Nice. It will be cool to see some Cosmo videos. I spent far too much time as a teen watching Cosmo videos on 3rotor.com, back before youtube existed!

[@Danny-d]

Love the way 20b and 26b sound but man they are expensive.. miss the rx7

[@bobnewhart4318]

Great video wasn't expecting that 20k price tag

[@neoanderson7]

People have alot money available to be doing 20B swaps into their FD's. I think this happens more in the US than anywhere else. I know alot of people up here don't do 20B swaps. When we attended DGRR this year, there were at least 4 FD's that had 20B's swapped into them. The rest of us were normal 2 rotors but with a variety of people running twins or single turbos. I think you spend alot of money getting a decent single turbo 13B running in the FD. Let alone a 20B. Can't even imagine the amount of fuel you'll be sucking down.

[@FukU2222]

I think the Eunos Cosmo was truly ahead of it's time.

[@FukU2222]

Would love a run down on 13b differences throughout the years in detail. I know the basics like compression ratio and rotor weight(s) etc... But stuff like port opening(s) and closing timing(s) and size(s) on S4/S5 and RE vs REW as well as maybe some earlier model stuff if you can track down some decent parts to use as reference. Would be gr8 m8 Good luck on the cosmo too, is the one your picked up 20b as well Kenny?

[@alexmartinez280]

The 20b is such a special engine I don’t get why more people don’t build high compression NA 3 rotors. Plenty of power especially in the glorious top end. Less stress, less complication and a serious weight loss. Light weight sport cars go with light weight power plants. Throw in ITBs and IMO it’s THE perfect set up. If turbo is your thing, building a high compression, low boost yield BIG power and not so unbalanced in power delivery. I drive an S65 M3 with 415bhp stock at 12:1 CR. Introducing just 6 lbs of boost takes output to 625-650bhp. Rotary engines are no different in that way. Mike Vargas is building this exact set up and proving my point. 450whp on 6psi!!! It is the drivers set up for those no just wAnting straight line pulls which is EXACTLY WHAT THE RX cars are. Comment below and let’s shine more like light to the upcoming holy grail RX 13/20b engine setups. High compression is the best way for true well balanced sports cars. I will build an FB soon to Group C Rallye spec. It dominated in its day and will dominate the streets as well over the accepted path of present day low compression high boost lopsided builds. The talent is already available, this fresh idea is all that’s needed teamed up with the rotary heads attention.

[@kasper_429]

How do you know what letter code the engine is? I've found several 20B engine packages for sale through JDM importers, anywhere from $4500 to around $7000 depending on the importer. Also, I've found a 20B swap kit through a company called Defined Autoworks, $1670 if you don't want A/C, and $2070 if you want to keep A/C. All they require is a shortened lower intake manifold so the engine clears the FD hood, and they offer the modification for around $500. Stupid question, but will the stock 13B-REW manual transmission bolt right up to a 20B? Or is there an adapter or any modification needed? This is all still a dream for me right now, as I have yet to find an FD for sale near me for a reasonable price, but I'm just doing research anyway.

[@smase944]

Well now i know what to look for and start saving, thanks

[@adamlemus7585]

Good video. Although I'm just now getting into Mazda RX serries cars but I started out with Aircooled VW's. There was an equivalent motor swap everyone thought was easy peasy but was expensive and difficult. It was the Porsche Type 901 F6. I would get the question every day "hey man why don't you put a 901 motor in it" to which I would reply cause I'm not stupid and made of money. So the three rotor deal and the truth behind it all really is something I'm happy to know cause I don't want to be the "why don't you put a three rotor in it?" Guy

[@_baller]

The big question... why are rotaries for sports cars only and not ordinary cars? Just not worth it?

[@zsquints]

To answere your question back in the 70's there were cars and even buses that had rotary engines in them at the time. The reason as to why they stopped putting rotary engines in consumer vehicles was mainly due to inefficiency, when the gas crisis happened those vehicles pretty much died and 4 and 6 cylinders started their reign into the average consumer car.

[@Muldoon111]

The D block is the holy grail.

[@darianmurcott-istead3001]

For sale in Sydney Aus right now.. (Fresh built 20b bridge port turbo. Series C. Lapped, nitrided, stud and doweled, balanced rotating assembly, lightened rotors, have new Pac apex seals, billet drive shaft etc. 7.5k aud) that's $5,878 usd🤔

[@crxsleeper18]

I remember i fell in love with the firsr gen rotary i got to drive. Always wanted to dive into the rotary world. Untill i looked a rebuild prices. I can rebuild my boosted crx for 300 bucks. Rotary seems like a rich man sport

[@flyboy8282]

You learn something new everyday

[@rabidrabbittt]

I tried getting a road legal fd with a 3rotor already swapped for ~40k$ as a 1st car lol. Couldnt get a loan. (I live in norway, and a gt86/brz costs more) (ended up with a supercharged is200)

[@j0lel666]

Olav Nyheim there was fd with 3 rotor for 15k € in finland brand new and we dont have many rx7s in finland id say 20 total in street

[@MrMazda-ih8cw]

Great video man. Really helpful - thanks for sharing!

[@Neocodeauthor187]

Looking forward to your Eunos build, I'm saving towards also securing one.

[@MajorMatt79]

Epic Vid bro, very informative and spot on. For all the muppets who thumbs down the video, you have no idea.

[@joelperezgumba]

What about the legends of people stacking an extra rotor and swapping eccentric shaft what I mean is is there any way to essentially mechanically build your own with internal parts and do the electronic stuff on your own

[@MrJman967]

I really appreciated this video, I just bought my first rx7(FC) and always fantasized about 3 rotor swapping it. After seeing this I'm having second thoughts. Any idea how expensive it would be to swap the FD motor in my FC? Assuming we're not using stock twins and going single turbo

[@Vipurs]

10gs

[@anyau]

My dream would be to keep it all oem. NA 20b in an FC. RX8 box. Stock porting etc. All under £10,000 would be a dream

[@truckloadofrhymes1]

It's actually quite common here in Canada to see 3 rotor RX7 lots of FCS

[@Tink-wo4yy]

I know nothing about a rotary engine! Except they can sound cool and run surprisingly well! I came across this video just asking Google what they cost, and damn! For that kind of loot i can build one hell of a dart block small block Chevy! And I've seen the little rotary cars do well in say a no prep drag race, have seen them in many, small and big tire car's, but ya know what? I've never seen one win the whole event, whether at a track or street. Hell 20-30 grand I could build a nasty big block Chevy! That will make more power and gobs more torque! So I'll stick with a good ol American V-8!!! 🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸

[@REVMedia]

Why do you think the Eunos Cosmo never take off in tuned culture? It's a brilliant and beautiful car.. looking forward to the build.

[@Vykk_Draygo]

Because it was expensive and rare?

[@84gssteve]

Another fact you didn't mention is that not all Cosmos came with the 20B. Many (most?) had the 13BREW engine, making the 3-rotor all the more rare, given that the Cosmo was not exactly a car produced in huge numbers to begin with. I lusted over a 20B swap back in the early 00's but reality kicked in and I ended up building a top notch, S6 internals S5 13BT for my FB. Didn't cost too much and 350hp is plenty fine in a 1st gen......plus she's still smog legal.

[@MrAusterror]

I think it was a 60/40 split in favour of the 13B. Had bigger stock ports too.

[@luisbarraza9709]

My 1st car was a 1979 Rx7. It would be sick to put a 20B in one of those.

[@pastormichaelhibbertminist7486]

I'm getting one...Great Video

[@CronusandRhea]

I love RX-7s but after watching these videos I'm discouraged rather than excited. I think I'll look into importing a Lancia Delta Integrale, which isn't a rotary but then I don't have to work on it myself. I live in an apartment and just can't do the work it takes to own a 7 or a rx-3 even.

[@user-wi7mi5kz2f]

Great, informative video. Looking forward for eunos cosmo 😊👍🏼

[@LEVIN6921]

Im not a rotary expert even if I really like them but there is something that really interests me. Northon has a 1 rotor bike, Mazda has 2-3-4 rotor cars. There is a custom built 6 rotor car. Why there isnt't a 5 rotor built?I would so do that.

[@21Noire]

Really like the video. I was that guy when I first got my FC then the more i looked into the more I thought fuck that, 2 rotors are good for me. But I was wondering if you could do a similar video about the 13B-RE and swapping that into an FC?

[@KennyatHumble]

I sold my Cosmo-RE swapped 10th Anniversary a few months back. It's pretty straightforward though.

[@21Noire]

Rotors Magazine I remember I saw it facebook lol. Glad to knoe its straight forward for the RE swap. I fine nice write up in fc3spro about it. Still not a cheap swap by any means but much more realistic for me

[@Macinvodakin]

Great info and break down of cost.

[@ImMrHonda4u]

finally some footage of a 20b

[@willable5922]

Hey. I have gotten myself deep into an RX8 swap. I had an FC motor built with New housings, Rotors, Seals at Mazmart here in GA. And i assumed wrongly that someone would have motor mounts available. Can you please give me some advise? Anybody you know could work out some mounts?

[@KennyatHumble]

Just going to take a lot of custom work. REWs are easier and people make swap mounts for them because of where the mounts sit on them vs. a TII

[@FukU2222]

Don't forget that bumpsteer on FDs

[@MrMeoow91]

If I am going to get a 20b, I will keep it stock and NA. It's the most safe way to make the engine last long.

[@ballstothewall38]

Nice vid, brings back many memories 👌

[@PochoNieves]

I just wish my 13B was working right and we had Kenney doing a sabbatical in Hawaii, lol!

[@doktorbimmer]

*The 13B never worked right... that is why Mazda finally discontinued them and RXs completely... they dropped it like a bad habit.*

[@mrairsoftkng]

I’m more of a numbers guy. So my question is what is the total cost of building / swapping a 3rotor into an FD and what is the yearly costs of maintenance of daily driving a 3 rotor. And if you have any information and answers to the same question but for a 4rotor. Please message me back or reply. Thank you

[@doktorbimmer]

*If you need to know how much it will cost? You definitely cannot afford it kid.*

[@andrayineka9019]

If a person was to look at purchasing an RX7, which model and year would it be, if money was not an issue ? I am asking for your opinion as you seem to truly know this vehicle well? And why?

[@lIIl_lIl_lIIl]

found a 1991 Eunos Cosmo local while looking for an fc, pretty cool lookin cars

[@eimundk98]

Awesome video! But I have one question.. What about an NA 20B engine? What would be the price to build an non turbo 20B?

[@boarderboi7]

Are NA 20B's more or less expensive than a turbo 20B's? My dream engine would be a PP'd 20B; not saying I could afford it but would love to know more.

[@hudsondonnell444]

The 20B is a unicorn amongst coveted rare engines.

[@zaccorpseman7366]

Beautiful car! Btw what's the setup for your tail lights?

[@dr_tal]

20bs are way more than money nowadays than they used to be. Mazda need to release a new car with a 20b in it or a crate motor series

[@gmonsen]

I think this is a good video that tells people a lot about the 20b swap. However, as a very long time Rx7 owner and modifier, I think it is wrong to give people the impression that they can put a 20b in their Rx7 for as little as $20,000. Maybe you could do it, but I have never seen or heard of anyone actually paying anywhere close to as little as $20,000 for the conversion. (I should note that I did the swap in 2006 and have a lot of time and knowledge about them and many friends who have done the swap as well and know what we all spent.) I think a base swap might get done for $30,000, but that's not going to be any 600-700 hp motor. It will be a base motor making 450-500 whp at most. The reason the costs are so high is that the motor costs, say, $6500. The rebuild with good seals and scalloping and balancing the rotating assembly is going to add at least $5,000 and could be $7500. When you add an ECU, like a Haltech or Microtech for maybe $1500-2000 minimum, you also need a $1000 wiring harness and a number of expensive sensors adding another say $500. You may need things like a new trigger wheel -- $200 --and fuel rails -- $300? -- and better Injector Dynamics injectors at maybe $500. Then, you need some smart coils, like AEM's, at maybe $250 for 3 of them. Add a decent turbo for $5000 and an intercooler for $2000. I'll go along with the Hinson subframe with bumpsteer kit for $2-2500. This is all maybe $30,000 and I think it downplays the cost of labor. I have seen 20b builds that go over $50,000.

[@KennyatHumble]

The word in play is 'minimum'. Yes, a 20B can be done for $20,000. But that's bare minimum. Done it several times. If you know how to build a motor yourself and do the machine work yourself, it's more than possible. Having the ability to fabricate a subframe, manifold, fuel rails, etc. yourself could potentially make it a little lower. 20B: $6500 Subframe: $2000 ECU: $1500 (Microtech includes flying lead harness), and runs off stock dizzy negating your trigger wheel and harness cost. Stock injectors can still be used. Manifolds can be had for under $1000, Turbos, $500-1000. Rebuild: $2500-3500 with proper access to tools. LS Coils are $150-200 for set of 6. A decent intercooler core ~$300-600. Custom fab your own piping. That means you're running a ticking time bomb of a transmission, more than likely a clutch that wont hold much torque, a diff that will explode after a dig hit, etc. These are all bare minimum basic build, not what I would recommend, but entirely possible.

[@nk0723]

gmonsen you're talking about sourcing an engine and then completely rebuilding it plus putting a bunch of aftermarket stuff on it which you don't really need though.

[@gmonsen]

Where someone is able and willing to do a lot of the work, you can get a 20b in for $20,000. I really was not -- am not -- disputing that and very glad to hear of a newer rotary shop in Iowa. I would just say that what you end up with is going to be pretty crude and won't be what someone might expect of the swap. If you do none of the work yourself and hire a shop to do everything, I think $30,000 is kind of the minimum.

[@gmonsen]

The only way you put a 20b in a car for anything close to $20,000 is if you do all the work yourself and are happy with a pretty crude and extremely basic swap when done.

[@johnyutah9542]

In the UK I was quoted £10,000 for just the block! Brand new of course, but with new turbo, exhaust, inlet etc your talking £20k+ easy. Just can't justify that in my eyes. I went 1jz with mine but if I win the lottery, maybe one day..

[@allouttagum4919]

This cosmo was insane on Tokyo extreme racer

[@rotarycollection]

Having a 20B is the best thing

[@christopherselleck5150]

Thanks for this video and the honesty the reality check .. Any kind of engine swap is going to cost $$$ plus time in work shop $$$$ to fit it all in unless your a wiz with mechanics ! The cost of things ... l nearly fell over when l resurched a cost of a quad rotor engine build $40 grand Aus this is not included the quad throttle body .. and honestly what also put the brakes on me about to drop this in a old trooper Land cruiser .I had to scrutinise options cost and what the finish product well be like ! I would ask who has the extra thousands of cash to invest into a car this is like a home owners deposit kind of prices !!! The Red Bull drift car quad rotor might be just the engine to install in that project ... and the top of the throttle body sticking up out the engine give it the look .. I do appreciate the explanation and pointing out the rubbish that can be mistakenly bought that why your building engines in the shop and we are watching the videos... I look towards seeing you project build.. It be great if you could as a shop mechanic dissect the quad rotor as some time . The engine seating in Mad Mikes RX7 quad rotor and that aggressive air filters top of the throttle body poking out the engine bonnet... I'm sure this car has alot of people on the edge off there seat thrilling viewing. It is a wonder how young drivers are traveling around in cars that are custom and have been to into a work shop for modifications . The value and the amount of money to have a out standing car suitable for a show or the race track would be considerable high and well thousands of dollars . And a much desired item many people adding myself when l was younger wanted to own . This would also be a trap and loop hole for criminal activity and a way to source the finances needed!! It is not easy to desire something seeing other people driving around it cars custom .... The car , the girl , the cool look...A trap many who would be vulnerable to influence would be drawn into a life or sector of the community to obtain cash .. I just hold a strong question about where the finances comes from ?

[@simpleclean2468]

If its hard to put into an FD, its probably gonna be twice as hard for an RX8 like Mad Mike cause that was a goal for me.