COSMOS 3 Rotor engines
Where the heck are these engines from and what versions can you get 'em in?
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It's an engine from the Japan-only Mazda Cosmo.
It has a 3 rotor engine (20B). "Basically" just a normal 13B (RX-7) engine with an extra rotor added on. I'm not sure about power output, but I know a stock 20B with stock 3rd gen twin turbos at 12.5psi boost makes approx. 550hp. |
Re: COSMOS 3 Rotor engines
Originally posted by ROSHX7 Where the heck are these engines from and what versions can you get 'em in? http://www.srx7.com/ Originally posted by Coolidge It's an engine from the Japan-only Mazda Cosmo. It has a 3 rotor engine (20B). "Basically" just a normal 13B (RX-7) engine with an extra rotor added on. Originally posted by Coolidge I'm not sure about power output, but I know a stock 20B with stock 3rd gen twin turbos at 12.5psi boost makes approx. 550hp. You can learn more about the Cosmo here: http://www.3rotor.com http://www.dmrh.com.au/ Here's a good site on a 13B Cosmo FC conversion: http://www.wickedrotary.freeservers.com/photo.html Here are sites on 20B Cosmo FC conversions: http://www.3rotor.com/chito.htm http://www.cris.com/~Asam/20B.html http://www.geocities.com/neo_beta1/20B_FD.html http://www.k2rd.com/Projects/20B/20Bpics.htm Sites with my 20B FC: http://home.talkcity.com/ThePits/spinracing/index.html http://www.spinracing.net/ http://www.rx-7.cc/edgar/auto/rx-7picnic/index.htm |
That's about what the 3 rotory rx-7 concepts made in 88 were tuned to. It buys you more low end torque and greater performance potential.
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I accidentally gave you an FD 20B page instead of this one:
http://www.se-rx7.com/20b/ This is probably the best site out there for those interested in a 20B swap for an FC. Hehehe, as you can tell, I have been researching this a bit. :) |
well then you might want to research it some more, because the cosmos 20b did not only come in one version, it came in a turbo and non-turbo version. my friend has a 1st gen cosmo with a 20b NON turbo.
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Does anyone know what a 20B conversion costs?
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Originally posted by presetlimits well then you might want to research it some more, because the cosmos 20b did not only come in one version, it came in a turbo and non-turbo version. my friend has a 1st gen cosmo with a 20b NON turbo. A Cosmo brochure from 1968 - no 20B engine, though: http://www.eunos.com/keith/110S/ Hehehe... Our engine runs circles around your engine! Hmm, a 20B rotor comparison, but still just 2-rotor engines: http://members.nbci.com/craigpage/PG16.HTM Nope, no 20B for the 1Gen Cosmo here, either: http://www.monito.com/wankel/engines.html Und der Cosmo ist heir mit dem 2-rotor (kein 20B): http://www.der-wankelmotor.de/Fahrze...smo_sport.html ... aber ich habe das drei-rotor flugzeugmotor gern! http://www.der-wankelmotor.de/Motore...-vaz-lada.html (Sorry, I got off track) Man, my research is really lame - No 20B NA 1Gen Cosmo anywhere! I guess it could be because the 20B wasn't developed until the mid-80's, but I like to keep an open mind. Help me out here, where can I find a 3-rotor NA 1Gen Cosmo? |
Originally posted by Flobb Does anyone know what a 20B conversion costs? Here's a recent link on the subject: https://www.rx7club.com/vforums/show...threadid=17205 |
i dont know a site on them, but its a first gen cosmo, but im not sure the year. but its a 20b non turbo. known for a fact
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$40-$50 grand is a lot. You think a Renesis conversion will be any cheaper when the time comes? For an N/A.
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The N/A 20B started life out as a twin turbo 20B from the latest Cosmo (late 80s through the mid 90s) line up. Mazda never sold 20B as N/A, only twin turbo and only in the Cosmo. Of course that never stopped anybody with the money and imagination from swapping the 20B and making it N/A. Out of Japan I've seen in a magazine a FC with a carbed 20B N/A. The Option video specifically for the RX7 (#33 I think) has a N/A 20B in a FD doing a top speed run on a test track.
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