In a bid to improve the engine, Mazda started full-scale development of the racing 13B engine with peripheral ports. Mid-development, it was discovered that the rapidly spinning rotors were creating a small gyroscopic effect that adversely affected the handling. The team overcame the problem by redesigning the moving parts to make them as light as possible, changing to a dry sump (a lubrication system that supplies the engine with oil from the oil tank), and mounting the engine closer to the ground.