The rotary made the Rx7 what it is, so it is somewhat sacrilige to remove the engine that the car came with. However with people's preferences and the desire for more reliable engineering. Sometimes we can forgive thise that defy Mazda's vision for their pure sports machine. 13b NA - Rip off the turbos and what do you have? A car capable of entering different classes of motorsport whilst retaining the superb handling characteristics of the original car. There have been a few created by AR-F in particular who like the screaming PP or large ported NA Rotary sound. You can also save a bit of weight too and build an engine that revs over 10000rpm.
20b 3rotor NA - Super GT created the legend for the 300hp 3 Rotor that is reliable and fast. The extra torque gives the car the grunt it needs and the rest is history. The sound from these cars is awesome as they rev.
20b 3rotor Turbo - Why? Because you can. With applications ending up with 800hp, this is the crazy end of street tuning. Something you cant drive every day. Pettit Racing produce a 500rwhp car for sale in the states. Grunt straight from the showroom floor. Lets find some tyres than can handle it.
4Rotor. Scoot has made the streetable 4 rotor a possibility however, you dont see many. This is the ultimate rotary configuration with LeMans heritage. Custom workshops more recently produce 4 rotor engines only for drag racing as 1000hp+ applications are possible.
V8. The small block V8 engines are some of the most reliable around. With lazy revs producing big horsepower, they have become famous in MX-5 conversions and more recently in the Rx7 as prices drop and engines expire. companies in the US have conversion hits readily available.
SR20- Typically, these engine swaps occur in the drifting fraternity as cars are destroyed, then joined together again. Like the Sil-80 Silvia, I guess you call them an SRx-7.
Cosworth- The latest creations are a little more left field as the Rx7 takes hold in countries where existing technology and tuning knowhow exist. The UK is one location where things maybe a little different.Russ
