Vintage Mazda Rotary RX-2, RX-3, RX-4, REPU, etc....

What Are My Engine Options For Repu?

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Old 12-14-2003, 11:31 AM
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What are the most common engine swaps for the repu?

I am getting ready to buy (yes finally ) one that has 83 12a with a header on it.

Can I get a 13b rew in there?

If so what needs to be done aside from the ecu. motor mounts, tranny, driveshaft.. ??

If the 13BREW isnt the best route what is?



Ito can you help?
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Old 12-14-2003, 06:38 PM
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After doing some reading appearently they came with a 13b stock so why would someone swap that out for a 12a?
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Old 12-14-2003, 06:42 PM
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It cracks me up that the 13B in the REPU is Carburated. I thought the rule was 12a = carb 13b = FI. Guess that doesnt apply in old school rotary.
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Old 12-14-2003, 07:04 PM
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Ideally I want a 13brew TT in there .
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Old 12-14-2003, 07:39 PM
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The first 13B I ever saw had a carb.
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Old 12-14-2003, 08:02 PM
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I swear I loved my B2200 88 pick up truck. Nothing like running 12.4 on street tires and still using the truck as a work truck. Picked up core engines,trannys. Went dirt bike riding with the bikes in the back. Fishing you name it the truck could do it and do it fast.
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Old 12-14-2003, 08:04 PM
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No one is answering my question?
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Old 12-14-2003, 10:48 PM
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Originally Posted by Fd3BOOST' date='Dec 14 2003, 06:04 PM
No one is answering my question?
any engine that will fit in a 1st gen will fit in the repu. the 67-85 motors all mount from the front cover so anything up to the fd motor will fit in by just putting a 12a front cover on it. the fd motor is a tad harder because the crank angle sensors are on the front cover, so you'd have to either weld up a subframe, or make the front cover mounts on the fd front cover
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Old 12-14-2003, 11:04 PM
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Originally Posted by j9fd3s' date='Dec 14 2003, 08:48 PM
any engine that will fit in a 1st gen will fit in the repu. the 67-85 motors all mount from the front cover so anything up to the fd motor will fit in by just putting a 12a front cover on it. the fd motor is a tad harder because the crank angle sensors are on the front cover, so you'd have to either weld up a subframe, or make the front cover mounts on the fd front cover
I have a spare Fd subfame so I could get that someheomounted in there. But I would still need to make mounts for all the other stuff.

Thanks for teh info.

Anyone got a pic of a stripped repu enginebay?
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Old 12-15-2003, 10:53 AM
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yup mike is right.. the only thing I have not heard of in a repu so far has been a 20b..
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