Originally Posted by 1992 trofeo
yeah, hardly any torque, dont they just **** fuel to?
The early ones got lousy mileage and not much torque, but Mazda'* got them pretty tuned up now. Since a rotary doesn't have any valves/valve train, it'* torque and hp curve is almost perfectly level from 1000 to redline.
What'* incredible about the rotary engine is it'* simplicity and power.
When the rotor makes one revolution, each of the 3 sides of the rotor has a power pulse. So there'* 3 power pulses in one rotation of the rotor, and there'* normally 2 rotors in an engine.
By comparison, one piston has to make 2 up and down strokes for one power pulse. That'* part of the reason why a rotary can make twice as much power as the same size piston engine, another reason is there'* no valve train to rob power from the engine, and the mass of the rotors spinning is a fraction of all the pistons and crankshaft in a piston engine.
It'* an incredible design. Mr. Wankel dreamed it up in the '20s. Mazda was hoping back in the late 60'* that it would replace the piston engine. If not for politics and the energy crunch of '74, it just might have.
If that would've happened, we be discussing things like street ports, bridge ports, J ports, and 3mm seals vs. 2 mm seals instead of things like ER rockers.