13b going into a 1985 rx7
 

What do I need in order to complete a 13b swap into an older rx7? It has a 12a so I'm thinking it should be pretty easy. Any info can help. :)

Are you planning on converting the 13b to a carb or wanting to swap EFI?

Carb is much easier and simpler, EFI can be very rewarding with higher horsepower - all depends on what you're into. It basically boils down to whether you want to do wiring or not :lol:

I'd like to keep the EFI. HOW HARD WOULD IT BE TO DO THAT?

Its not hard if you use a GSL-SE engine. I have done the conversion and have a lot of experience with the GSL-SE and with the conversion. What specifically would you like to know about it?

These are my two restoration threads documenting the process. They coincide with one another:

https://www.rx7club.com/1st-gen-gene...roject-796342/

https://www.rx7club.com/build-thread...ration-822222/

Okay so first question. Will my 12a tranny bolt up to the new 1991 13b? I've heard people saying that they should bolt up perfectly. Also I want to keep the fuel injection. What kind of wiring would I have to do? I know I need to get a newer fuel pump.. but other than that I'm sorta lost. Keep in mind that I have most of the wiring harness aswell as ecu. Will it be like a pug and play? Honestly thisay Is my first rodeo and first time I ever worked on a rotary engine myself. So if can get the most help it would be amazing. :)

For that later model 13B I think the mounts will be different, so you
would need to swap in a front cover to mount the engine at the same
points as the 12a or fab some mounts for the 13B engine.

Also, the wiring will not be plug n play using a 2nd gen harness. Note mazdaverx713b
said using a GSL-SE engine to swap in is straight forward, not a 2nd gen.