Wankel rotors of 13B. The 13B is the most widely produced rotary engine. It was the basis for all future Mazda Wankel engines, and was produced for over 30 years. The 13B has no relation to the 13A. Instead, it is a lengthened version of the 12A, having 80 mm (3.1 in) thick rotors.

The 13B engine is widely known Mazda Wankel engine. It was produced over 30 years and offered for many Mazda's models including the RX-7 - legendary Japanese sports car. This Mazda rotary engine has a two-rotor design like its predecessor the 12A .

Only one style of rotor is available for the 1974-85 13B engine. However, 1974-75 12A engines have a symmetrical combustion chamber (and will interchange front-to-rear) while 1976-85 rotors were asymmetrical in the combustion depression.

In this article, you’ll learn the story of the 13B — by far the most-produced rotary engine — including why people are obsessed with it, the best way to extract power from it, and much more. In this article you’ll find: Why do people love the 13B? …

Oct 17, 2023 · The 13B rotary engine is one of the most incredible feats of modern engineering, with Mazda staying loyal to the masterpiece for over thirty years. There’s no question that the 13B was at the forefront of Mazda’s rotary loyalty, and we’re going to explore everything you could need to know about the insane powerplant.

Feb 25, 2025 · What is the 13B Engine? The 13B is a rotary engine developed by Mazda. The “13” refers to its 1.3-liter displacement, and the “B” indicates a specific variant within the Wankel rotary engine family. Unlike traditional piston engines, rotary engines use a triangular rotor that spins inside an oval-like housing, offering unique power characteristics.

Instead of the 13B-REW, the 13B-MSP is a naturally aspirated (NA) engine. It kept two-rotor layout with a capacity of 1308 cc (79.81 cu in), the same rotor radius and length. Each chamber volume is 654 cc.

Feb 23, 2023 · The 13B-RESI (Rotary Engine Super Injection) is a naturally-aspirated 1.3-liter 2-rotor engine that produces 135 horsepower and 180 Nm of torque at just 3,500 RPM. It’s a big improvement over the earlier 12A models, so this is one of the ultimate

The 13B engine displaces 1,308 cc, uses a compression ratio of 10.0 to 1 and delivers 232 horsepower at 8,500 rpm and 159 ft-lb of torque at 5,500 rpm. In 2002, Mazda offered a turbocharged version of the 13B called the 13B-REW which produced 280 horsepower.

Dec 5, 2024 · The Mazda 13B rotary engine has been a staple in Mazda’s lineup for many years, offering a unique driving experience and a distinct engine note. Its compact size, high-revving nature, and impressive power output make it a favorite among rotary enthusiasts.