I am looking to do an engine swap with a 1988 stock Mazda rx-7 with a 13B engine and put a 20b enigine in. Can I do this easily without changing the front end. I can cange the motor monts and easy stuff like that but I don't want to play around with firewalls, or the front bumper or front frame. Well please let me know thanks. If this is or isn't possible I stil need an engine. I am looking for currently a 13b and a 20 b engine with twin turbo for sale with little or no mileage. Rebuilt is fine. Well thanks.
steve

 

Its been done many times.. I think there is a section somewhere that details the swap.

 

http://cp_www.tripod.com/rotary/pg25.htm

 

steve, are you new at all to rx7's? there is no frame in the front at all... And the car has a unibody. The front end is two bars that you can kick off if you don't like um (i did this... and then attacked the unibody with a grinder... and now i have THE COOLEST front end ever LoL)
Why do you want to 20b swap (as in what is your goal)? If you want to run anything higher than 10's I suggest sticking with the 13b and a good port job. There's always something to be said for a stock 13b thats fast. If you just want the quickest cheapest thing you can find, I recommend getting a Vega or an SS with a 350 and Turbo400 tranny.

 

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


-Ted