Or is the experience of a rotary engine worth the risk? Rotary engines are high-revving and can produce a lot of power in the right hands. They are easy to modify, customize, and build , and you can do so pretty inexpensively to create a fast car. Rotary engines are used in a lot of pro-compact drag racing cars because they can handle an absurd amount of power. But at what cost? Share Tweet Email Whatsapp. They must be kept above rpm. Passengers over six-feet can sit in the rear.
The engine floods easily. Engine life can be short. Apex seals are the first part to fail. Be prepared to replace coils often. Winning Blue is arguably the best colour choice. More Mazda posts. Sort by Best Sort by Latest. Two spark plugs are used to ignite the air-fuel mixture, helping to speed up the combustion process and ensure the majority of the fuel burns, and this forces the rotor to continue to rotate.
Similar to the intake stroke, the rotor moves until exhaust ports are accessible, and the exhaust gases at a high pressure are then forced out as the rotor closes off the housing.
This means that while intake is occurring on one portion of the rotor, a power stroke is also occurring, leading to a very smooth power delivery and a large amount of power in a small package. One of the biggest advantages of the rotary engine was its size.
The 13B engine of the Mazda RX-7 took up about one cubic foot of volume, yet produced a significant amount of power for its small proportions. Often in engineering, the simplest solution tends to be one of the best solutions. The rotary engine drastically reduces the number of parts required for combustion to occur, with just three main components spinning in a two-rotor motor.
The rotary engine has no reciprocating mass, like valves or pistons in a traditional engine. This leads to an incredibly balanced engine with smooth power delivery, and the ability to rev high without concern of things like valve-float. The Mazda RX-8 was the final production vehicle with a Wankel rotary, the 1. Whether or not the RX-8 lived up to the rotary name, we all shed a tear at the loss of this innovative and unique approach to internal combustion.
What dealt the final blow? The RX-8 was unable to meet Euro 5 emissions regulations, and thus it could no longer be sold in Europe after Though still legal in the states, sales had significantly dropped as the model had been around since Due to the long and uniquely-shaped combustion chamber, thermal efficiency of the engine was relatively lower compared to piston-cylinder counterparts. This also often led to unburnt fuel leaving the exhaust hence the tendency of rotary engines to backfire , which is obviously as awesome as it is inefficient.
By design, the rotary engine burns oil. There are oil squirters in the intake manifold, as well as injectors to spray oil directly into the combustion chamber. Not only does this mean the driver must regularly check oil levels to keep the rotor properly lubricated, but it also means more bad stuff comes out the tailpipe.
And the environment hates bad stuff. Remember, intake and combustion are occurring simultaneously, but in very different locations in the housing.
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