3-rotor 20B PP rotary engine dyno | The Silver Bullet
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- เผยแพร่เมื่อ 13 ก.ย. 2024
- Chris Muscat of Centreline Suspension gives us an up close look at their 3-rotor 20B rotary peripheral port naturally aspirated race engine on the dyno at JPC. The 3-rotor features a custom variable intake runner length manifold that powers the fantastic sounding Centreline Mazda RX-7 Sports Sedan circuit racer.
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Chris Muscat of Centreline Suspension gives us an up close look at their 3-rotor 20B rotary peripheral port naturally aspirated race engine on the dyno at JPC. The 3-rotor features a custom variable intake runner length manifold that powers the fantastic sounding Centreline Mazda RX-7 Sports Sedan circuit racer.
Fullboost is the engine for sale
Anything is for sale for the right price ;-)
Strong man ;Isn't just a matter of time with a Rotary?!
Ase Morton false I have a rx-7 with its original 12a rotary still in it and with propermaintenance it has 120k on the current rebuild and running strong. The engine itself haves over 250k original miles total and now 120k after the rebuild. You just gotta know how to upkeep the engine you gotta do premix and make sure it’s not starved upgraded fuel pump and injectors etc and make sure you rev the piss out of it not like a mad man tho and let it rev out while driving it they last long but people say they are unreliable because they don’t know nothing about upkeep and treat them like piston engines that’s there down fall.
Irish swaggkidd What's the importance of reving them (other than the fact thats how they make their power) in relation to longevity/reliability!?
that induction system with the adjustable trumpets is ingenious.
The idea comes from Mazda, who used variable intake runners on the 787B. This is first time I've seen someone else do it. Either way, it's pretty cool.
TFTM22 yeah, I watched the video.
Last years engine masters competition in the states had a similar design but on a hemi v8 -> th-cam.com/video/J6rBsztpt8I/w-d-xo.html
Left Is Best Volvo and alfa Romeo had variable intakes 1996 so nothing new
piffiiiiiiit Alfa Romeo’s and Volvo had variable intake 1996
Using the 12v drill motor to control the intake is genius. I believe Mazda used power window motors on the 787b.
It looks like it switches between long and short runners at a given RPM. If he used a micro controller paired with a stepper or servo motor he could have a continuous runner length adjustment rather than the simple two position system.
@@splint3048 exactly what I was thinking too, i imagine a stepper working alongside the throttle to make things easy
Such a humble bloke deserves the success he has had. That engine sounds like pure sex. And that induction is pure genius. Awesome video lads
that adjustable intake length is the coolest thing I've ever seen.
Japan, New Zealand, Australia and a little bit of Puerto Rico= Land of Rotaries.... Felix would be proud.
what a redundant reply. why would you comment that saqib
Tell me saqib would you premix a 2 stroke? Why do you say rotaries are unreliable? Is it because you heard a lot of people repeat it over and over without any experience or ownership? If you maintain your rotary engine it will go way longer than 35k
Saqib Sharieff all you did was recite what you’ve heard other ppl say w/o any experience
A little bit of Puerto Rico? More like A LOT of Puerto Rico.
@Sharieff sharif Yeah m8 rebore that Rotary, do you run forged pistons in it too?
“Wild” is an understatement. Watching the ITBs retract halfway through the run was wild to watch.
"5 litre V8 would be great, but I'd got a 4 rotor while I can" or something like that...well there's music to my ears!
Plus 4 rotors would be lighter than v8
@@dress2impress1000 incorrect. 3 rotors are about on par with V8's. The only advantage is a 4 rotor is smoother, potentially higher revving and way lower center of gravity (this is coming from a rotary guy who is currently wearing a Rob Dahm LS/13B swap shirt)
@@jacobwebb8818 true. But billet 4 rotors like rob's
@@jacobwebb8818 how 4 rotors have higher revving than 3 rotors?
@@YansenHaryanto4547 depends how they're built and set up
what a legend of a bloke, great interview guys!
I like this guy, he seems very modest.
Lap records are pretty impressive considering supercars done a 1:31 in 2016 and this did a 1:34 in 2002...
LandRoverLife rotary power!
Chloe Delaney Supercars as in the top racing series here in australia the one that Luke Youlden won Bathurst last year in.....
Lap record for 3l engined car.
Chloe Delaney what a noob
Chloe Delaney not that id expect much from a female lmao. all show and no go
That was my video @6:39 Awesome to see that you used it for your video!
Cheers thanks Nash, just subbed to your channel mate ;-)
Fantastic! Thanks mate, you boys keep up the killer content 🤙🏻
Ask before using something that’s not yours and give credit when using it
Biggest FC3S fan and WOW first time seeing this race car of yours.
That is so good looking!!
It takes an obsessed Aussy to make something so utterly awesome.
thats some variable intake setup..... cool stuff
Adjusting velocity stacks...Genius shit fellas! Nice
Great interview.
Humble gentleman.
Great tips on who to see.
I just love how it's obvious that the adjustable intake trumpets actually do something it hits a spot they go down then it screams on
Thanks for sharing Chris! Followed this car since 2000... sorry to hear things didn't go as well as planned at the bend - time to add another rotor & go 26B?
The removable rear clip is great. Sure wish I'd had it on my FC road car, would have made maintenance so much easier. I love that someone is still pushing this platform to find it's limits.
Seen the engine and entire car torn down in their shop.. seriously awesome stuff
That shop-built variable intake system is impressive.
Sickest FC ever
The 20b is the only engine I keep turning down my phone volume and the sound keeps getting louder love it
Them moving trumpets are so flippin awesome. And that sound gave me a chubby lol!
That 3rotor rx7 is SUPERPHAT!
3 rotor, 4 rotor, 5 rotor and/or 6 rotor rx7, rx8 or F1 of this? Hellz yeah I am so in!
A four rotor of this ? Yes please ! The cars weight distribution looks like it should be incredible, especially with the interesting engine placement in the chassis. Albeit a bit freaky if there is a major mishap. Would hope there is more surrounding that engine that the usual sheet metal work most race cars have.
I always hear or see people with long and short tube for the intake for the torque curve. And that setup is sick.
Everyone knows that intake is insane. Not only does it look cool but it works REALLY well.
Great feature length video guys. More of this please. Maybe a series that looks into sports sedans car by car?
What a beautiful noise !!
@4:21 OHH MY GAWWWD!!!! and that revmatch!
Bravo!
That intake system is so cool!
Loving the variable intake trumpets
Great rotary content and i love that inlet design! Id like to build a N/A 26B with that style inlet and model the exhaust manifold off the Le mans design too - how awesome would that sound!?
I believe the 787B also used 3 spark plugs per rotor, and likely had some other changes.
That sound is glorious
The stock RX8 inlet manifold does a similar job, albeit not infinitely variable.
Love this car what a nice package and this guy can definitely drive the wheels off of it!
Sounds awesome. I gotta settle for my stock 1.3. 😊. Keep up the great work!!!
That was awesome, what wicked little car. I loved the in car footage coming down con-rod and carving up the competition B-)
Little glimpse of it running up the hill at Baskerville nice..
That’s some crazy stuff
the LaFerrari V12 uses variable intake runners as well, awesome execution here
Porsche and maserati too.
Porsche have been using it since the 993 25 years ago...
Great video mate
4:06 AGRESSIVE!!!!!!!!!!!!! GOOD LORD!
How long ago did this race at Baskerville? You should bring it back over now that the track has been resurfaced. Awesome car I love sports sedans, I wish there was more of them here in tas!
C.Renalds knows his stuff.
Lol my mum always thought they were F1 engines with the amount of fire they blew. Funny though coz she drove a 13b Capella for years. Bit like he said, when your the driver you have no idea...
Watching the inlet screws unwind themselves
Sounds awesome
This is awesome!
So fast!! Amazing sensations omg!
That FC onboard video made me lose my breath. Sick!!!
The bolts on the induction air box had me stressing, you can see them vibrating violently so close to the trumpets would be a bad situation if one of them was to find its way into the engine.
That dude can drive in the silver bullet 😝
Rotary 4 Life you have one beautiful engine braaappp braaappp braaappp baby lol
Could someone please share the contact details for the guy who designed the induction system. It looks so special
if anyone were to rebuild the 787b it would be this man
Love it!
AWESOME AWESOME AWESOME
0:02 rotary "vtec" engages
I didn't know Australia got suckered into making E85
@GbbJunkie that's bs! I've ran my Evo on e85 for over 8yrs with zero issues with it eating rubber fuel lines & plastic!
I wonder what the dyno shows on a stock itb set up to this adjustable set up? Also would like to see the dyno sheet for this thing with & without the box. Please & thanks :)
can anyone tell me what this tube looking things are that go up and down ?
Yes.
That's one wicked weed wacker. Sounds AMAZING.
HP Logic in Florida has a NA 3 rotor that they milled a port into each of the irons to increase the top end overlap with fuel and air. Curious what your thoughts are about that yellow 20b FD3S
@Leland Holton
No, definedautoworks did the build and its known as a semi-peripheral port in the rotary world. This is a full peripheral port - a much larger hole in the rotor housing allowing more air into the motor. Jack at HP logic races that car in a series where full peripheral porting isnt allowed and as such his motor is a VERY complex build to meet those regulations. That is what he didn't explain in his videos to people who dont know about rotary!
Wtf incredible itb 😯🤤♥️🇮🇹🏁
I want this engine in an MX-5
Is that a type of putty on the fuel line connects to keep it from unscrewing?
I need to see a dyno curve of this
Love it
awesome
Pity you never get to see a dyno curve properly anywhere.
Not showing the difference/change in power/torque for the active & fixed stack lengths make me question what is it doing there ??
Thats one hell of a cold air delivery system he has put into that race car.
a snip of this video made it onto donut media =D
1962cc it's a 1.9 liter or a 2 liter for marketing reasons
These coils seem pretty similar to late 80s mercury outboards.
if you ran on E85 you'd make that same power with more timing and lower RPM or you could make more power .. you'd need much more fuel pressure, and a mechanical pump for reliability and use a lot more fuel. problably 40 50% more
you would think those trumpets would move slower at lower RPM. they kinda only move at what 8.5K to 10K redline
Well, as it is a racing car I think that the most usable range would be in the higher RPMs
Hey guys I just come across this video. And you said that your 3 rotor is a 3 ltr. I run a 3 rotor in my s 2 rx7. And it’s all 20 b parts and it’s a 2ltr. 1995cc’s. How did you make yours a 3 ltr? Because I have just panted a Rotory engine that’s is a 4ltr and you can’t use any normal rotary parts. So that’s 13b/20b/ 12a or 10a parts. Its all custom. So I think you said you used 13b housings so that means the rotors will be 3x221.6 I think off the top of my head. Making each rotor around 665cc’s so 3x 665cc’s is 1995cc’s so 2ltr. Or did you make a mistake saying 3 ltr? Or it being a rotary you have to step up to the 3ltr class? I’m just asking not trying to course any problems with any one or anything like that. I’m just asking. Because it is very interesting to me. I’m all ways wanting to learn things from anyone who has done something different. Oh and I must say cool racing. Love the 7. It’s kickass. I just have a busted ass series 2 Rx7 with a 20b in it. With a modified GT47. To suit the 20b. I run it to 10,000 rpm and I only need 12psi. But I love it at 20psi, it’s just sick now with all the mods I’ve done to it. And when I finish my the 40p I call it. No turbo needed. It’s going to make big hp na. I love 4 rotors. But I wanted to have something that no one else has got. It’s my design and the way I want it. But anyone who wanted to build one can go do it. It’s not hard. There are a lot of people around the world building crazy rotors. And it’s kickass to see. Good on ya guys good work.
Capacity of a rotary engine is measured in different ways. In Motorsport they are usually upscaled. This engine is still factory capacity.
Fullboost ok cool. No worries. Good work. When I finish I will send you the info. And you can build your self up an engine that will make the hp you want with out devil makes. And lest then hafe the fuel. And that’s NA. No turbo. But if you do turbo it ? She will be one hell of a ride. Thanks again and I look forward to talking to you soon. Patt.
Top story 👍
Billy Connolly sure worked on his australian accent.
i always thought those things had more granularity. instead they just go up or down
Omg there's more
Xtreme Rotaries out of business? Another shop that could be recommended?
Defined Autoworks (according to rob dahm)
Depends where you are, if your in Australia you have plenty of choice, Same as New Zealand.
So how many hp does it have
Takahasi bross approve this
Long trumpet for power, short trumpet for torque. It's work like that right?
Sorry for bad english
other way around
o yea she sounds cool as fuck !!!!!!!!!!
if the intake moves down near the top of RPM why not make it short to get the extra hp all the time ...or is it like v-tec for mazda
look up acoustic supercharging friend, long runners actually give you more power at lower RPM, whereas they don't make as much power at higher RPMS,
short runners make a lot more power at the top end of the RPM range but make very little torque when you're at low RPM
That's not how this works, go watch engineering explained's video on variable length intakes
How is it considered a 3 litre? 3x693cc rotors isnt it? Sounds delicious. 26B would sound even better. Long live the Silver Bullet in rotary guise....
3 rotors are 2 liters
Yeah so whats your explanation? He was saying it was a 3 litre motor.
5:21. 654cc each rotor not 693cc.
3 litre class of racing maybe?
CAMS applies a factor of 1.6 to rotary engine capacity to make it fairer for piston engines. So whatever capacity the rotary is it has to be multiplied by 1.6 and that's the class they race in. A similar factor is applied to forced induction motors.
Sounds a bit lile old F1 V10s
A oui voila un vrai moteur avec un vrai son.....
Can’t someone explain to me why the itb’s retreat/get smaller at a certain rpm? Is it for more airflow at the top end?
TheOne AndOnly They match the acoustical tuning of the intake to the engine. Every time the port opens or closes, a pressure wave passes back though the intake runner. Similarly, when it reaches the end of the pipe, a wave reflects back towards the port. The goal of intake tuning is the line up the high pressure part of the oscillating flow to coincide with the open port, driving air into the engine.
It’s all wave harmonics and resonant frequencies, if done properly, you can get more than 100% volumetric efficiency by induction tuning.
So how much hp/torque does it make?
@Pähkel
He said in the video, 500
I always thought that the 20B was a 2L not 3L
Technically it is a 2.0 litre but in racing they put em in the next class up so 20B in the 3 Litre class. The 13B runs in the 2 Litre class i think? It just depends on what class and what country you race in, as the rules are different everywhere you go. Whats really impressive about this RX7 is most race meetings its snapping at the heels of 6.3 litre chevs and other monstrous beasts that are in the open class. It punches above its weight and has been since early 2000s Chris and the centerline team have earned the respect of everyone in the [paddock including his competitors
Mega.
It's a 3 liter! everyone remember it's only
a 3 liter!!**
**with the same # of combustion events per rpm as a 9 cylinder but the weight of a Briggs and Stratton... And it spins like a dam turbine! still I'm sure there's a 3 liter 6cyl out there that can make that kind of power na with better torque, more predictably and less rpm... there is something to be said for the volumetric efficiency and the round combustion chamber of a piston. It's funny how on paper the rotary should be far and away better but it's just not in real life... The weight advantage is real but the rotary is just a labor of love regardless..
Each rotor fires once per crank revolution so a 3 rotor has same number of firing event per revolution as a 6cylinder . So a 20b is effectively a 4.0L but I guess they class it as a 3.0 given its inefficiencies compared to a piston engine .
No le entendí un carajo, pero me gusta ver el vídeo
4:15 wtf are they doing?
Three cylinder : nah Three rotary : oh shit