The Ts cup 1300cc in japan using gx heads and bored to capacities close to 1300cc are rated at 170ps at 8500rpm.Their heads and blocks came in production cars.id say a "nismo" crossflow head specifically made for race use only, on a race 1300 block, 200bhp+ would not seem far fetched.but thats jst my opinion ive based solely on history and achievements of nismo/ factory works "race only" products and cars.

nzdatman, i think its fair to say an engine or car specifically designed and made for the sole purpose of racing is very different to a production engine or production car.they dont put fuel,idling etc into consideration.just pure performance.but as you say 200hp+ is quite a feat.maybe it did, maybe it didn't.no concrete info about these ay12 engine...