What do I need to do to swap a 1987 Mazda RX7 with a 3rd Gen RX7 engine?

I own a 1987 Mazda RX7 and bought the 3rd Gen 13BTT engine to drop into it. Has anyone done this yet that can give me some tips on what will have to be done to accomidate the new engine. I do have both the engine and tranny and some parts other than that that are ready to be dropped in but still trying to work out with the 87 body.|||oh man they make


mazada frankenstein cars too


not just b16s and hondas anymore|||i do alot of motor swaps,and u will need the wire harness ,and computer with relays|||its gonna require some modifications. not sure if you researched it already, but the inner fenderwells of the FD3S chassis are shallower than that of the FC. and the motor mounts are different as well, so you'll need to either find some or custom fab them yourself. make sure you have all the engine wiring harness, and the ecu. might also need the fuel pump/relays/etc. since the 13B twin turbo will require alot more fuel.





the easiest way to drop an FD motor into an FC is to rebuild it and redrill the center irons, that way you wont have to custom-fab the motor mounts, and itll save you a lot of time and money.


I'm no expert when it comes to rotaries, but a few of the guys in my crew have FCs, so i've picked up this stuff from them.





hope this helps!