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13b To 20b Swap

Old 12-15-2004, 09:24 PM
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i am going to be getting a 1991 rx7, presumably na. i just did some research and learned a little on how the engine functions. i still have nooo idea what limits and restrictions there are for these cars. what i want to know is if we cna put a 20b where a 13b was. from my understanding the 13b is 2 rotor and the 20b is 3. what else is different and whould this work? also, how about making a tri rotor 13b, or is that the exact same as a 20b? where can we get eccentric shafts to accomodate more rotors? the 1991 quad rotor used a 3pc design, but why not machine a solid shaft? i need some solid info to keep learning. than x
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Old 12-17-2004, 12:38 AM
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Yes, you need to do more research.



An NA has the weaker drivetrain, so MINIMUM you need the entire Turbo II drivetrain first...



Hope you have a lot of money...



http://fc3spro.com/TECH/SWAP/COSMO/20b.html





-Ted
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Old 12-17-2004, 01:41 PM
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so what about the eccentric shaft?
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Old 12-17-2004, 01:49 PM
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thatnks for the link, very informative. what are the majority of enthusiasts running around here? i want to build a set up to kill hondas, acuras, mitsubishis, etc. nothing crazy but fast none the less. thanks again.
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Old 12-20-2004, 07:47 PM
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drop a 13b-re in it. if you don't mind spending 7K. with a little work you can have 350+hp. Same website as the 3 rotor has the 13b-re swap.
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