I've had an R100, RX2, 2 RX3s, 2 first gen RX7s and a 2nd gen RX7. I've crewed on an IMSA RS RX3 team that also ran a rotary powered formula car in IRDC, and on an SCCA pro Rallye team that ran an RX2. I built the ported, Holley 4bbl equipped single dizzy 12A in this 13 second 1/4 mile, autocrossing RX3 I owned for a couple years:
And my second first gen had a heavily ported 13B from an RX4 in it. Loud as hell, and pretty torquey.
My 2nd gen was a Sport model, and was my autocross car for a year, with the rather simple suspension setup based on a national champion. It won it's class for the season, beating outright a number of RX7s and 944s with trick multi-adjustible suspensions.
Then the engine died, and I found (this was 1993) that it was going to cost more to rebuild it to stock specs than I had, and after so many years of racing rotaries, I realized that using a used rotary engine was not a viable option.
So I built this
For less than the cost of rebuilding the stock 145 hp 13B, I built this nearly 400 hp and 400 lb ft of torque Ford 302. I moved the battery to the well behind the passenger seat, removed the stock oil cooler, and put in a Griffin aluminum radiator. The engine sat entirely behind the front wheel centerline, and the weight distribution actually improved to 49/51 f/r! Handling improved, and yet the total weight of the car was still less than a stock FC TII (2720 vs 2800).
I've gotten a lot of flack from some rotary purists who think that it automatically made teh car nose heavy, or that even though it was light and balanced, a rotary could've been lighter yet. Well, yes, it could've been lighter yet, but that doesn't stop this car from being balanced and light enough, massive fun, and VERY inexpensive and reliable (how long does the average 400 hp rotary engine last? I've ben told if I wanted a V8 car I shoulld have gotten a Mustang or Caamro. Well, I've HAD both of those. For the money, a V8 RX7 looks better, is lighter, handles better, has a better chassis, better ergonomics, better build quality, better brakes, etc. Guys that think the V8 RX7 is no better than a Mustang or Camaro really think poorly of RX7s other than the engine, I must say.
Anyhow, if I weren't going to be getting rid of the Fiat in my sig this spring, I had been contemplating putting a 13B turbo into it. Would be loads of fun!