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Mazda Cosmo

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Old 05-06-02, 08:38 PM
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Mazda Cosmo

On the way home from school(yes im still in highschool) I spotted a beat-up Mazda Cosmo for sale. I was wondering since they have a 3 rotor engine how difficult an engine swap would be. Granted i know it won't be easy and i havent check on the engine condition or price, but just curious to know if this would be a good idea.
Old 05-06-02, 08:47 PM
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Not all Cosmos have the 20b in them. Many many were made with the 13B.
Old 05-06-02, 08:52 PM
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Re: Mazda Cosmo

Originally posted by BDoty311
On the way home from school(yes im still in highschool) I spotted a beat-up Mazda Cosmo for sale.
There are Cosmos in the US!?
I was wondering since they have a 3 rotor engine how difficult an engine swap would be. Granted i know it won't be easy and i havent check on the engine condition or price, but just curious to know if this would be a good idea.
US$20K seems to be the minimum required to do this properly, safely and legally. Check out the 20B forum.
Edit:
Wait, you're still in school? Better stick this one in the list of future projects...

Last edited by NZConvertible; 05-06-02 at 08:56 PM.
Old 05-06-02, 09:14 PM
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ERROR IN FACT! ERROR IN FACT! Sorry i just found out that the 20A engine was found only in the Japan spec Cosmo, not the US version. Damn i was hoping for that good ol' 300 ft/pds of torque!!
Old 05-06-02, 09:31 PM
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Originally posted by BDoty311
ERROR IN FACT! ERROR IN FACT! Sorry i just found out that the 20A engine was found only in the Japan spec Cosmo, not the US version. Damn i was hoping for that good ol' 300 ft/pds of torque!!
20B?
Old 05-06-02, 09:40 PM
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Originally posted by BDoty311
Sorry i just found out that the 20A engine was found only in the Japan spec Cosmo, not the US version.
The Cosmo wasn't sold outside Japan...
Old 05-06-02, 09:48 PM
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The RX-5 was the cosmo.

Of course my mazada 929 is also a cosmo (without the rotary in the US).

The 13BT cosmo engine has the twin turbo intake manifold, thus it's desirable as an upgrade.

Old 05-06-02, 09:50 PM
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I know the US had a model called the Cosmo...Was it RX-3? 4?
Old 05-06-02, 09:58 PM
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The 13BT cosmo engine has the twin turbo intake manifold, thus it's desirable as an upgrade

What cosmo are you refering to? the newer 13b cosmos are twin turbo the use the 13brew. Normally the Cosmo intake manifold and surge tank is a different design than that of the RX7.

In speaking to Tuners and other enthusiasts i have learned that the ports on the cosmo engine are larger so that would be a desirable upgrade.
Old 05-06-02, 10:02 PM
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you probably saw one of those old azz 1969 cosmos.. just like the one they showed on last month's road and track when they introduced the mazda rx-8.. if you're referring to that.... thats old as hell and they aint 20b.. i think they're either 10a or 12a 4 port
Old 05-06-02, 10:02 PM
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Originally posted by NZConvertible
The Cosmo wasn't sold outside Japan...
Correction then: the JC (91-95) Cosmo was Japan-only.
The HC 929 (86-90) was also sold as the Luce (loo-chay) in Japan with a S4-spec 13BT and Auto!
Old 05-06-02, 10:27 PM
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929 is called the Luce, not Cosmo :P
Old 05-06-02, 10:41 PM
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From what I understand, the old 110 Cosmos are selling for big bucks nowadays. However, you were probably looking at an RX-5 Cosmo, which isn't worth much right now. Here are some various links with Cosmo info:

http://www.monito.com/wankel/vehicles.html
http://www.der-wankelmotor.de/Fahrze...smo_sport.html
http://www.dmrh.com.au/
http://www.geocities.co.jp/MotorCity/6881/
http://mazdarotary.alphalink.com.au/

BTW, even if you get a 20B for free, it will still cost you about $10,000 to install it into an RX-7. Sorry.

Last edited by Evil Aviator; 05-06-02 at 10:46 PM.
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