It was renamed 20B after Mazda's naming convention for the 767 in November 1987. As a three-rotor design, with each chamber displacing 654 cc (39.9 cu in), three chambers (one per rotor) would displace 1,962 cc (119.7 cu in), and so the new series name reflected this value ("20" suggesting 2.0 litres).

Apr 22, 2022 · Being the only production 3-rotor motor ever made by Mazda, the 20B engine is commonly regarded as the “big block” of the rotary world. It was the first sequential twin-turbocharged to ever come into production, let alone being a 3 rotor Wankle — the 20B truly is Mazda’s crown jewel.

Mar 28, 2021 · Move over 13B – it’s 20B’s time to shine! We’re taking an in-depth look at everything there is to know about Mazda’s legendary 3-rotor. What Is A 20B? Which Cars Have The 20B Engine? How Much Is A 20B?

Feb 22, 2023 · All you need to know about the 20B engine and its variants including the 13G racing, 13G production and 20B-REW production rotary engines.

3 days ago · Not only was the 20B revolutionary for being the world’s first production engine to include a twin-sequential turbo system, but its improved torque output and increased displacement often make the 20B the most sought-after rotary on the market.

Jan 14, 2022 · The Mazda 20B race engine thrives at high rpm, but turbochargers power the 20B-REW. When it comes to increasing power on the 20B-REW, you’ll quickly meet the limits of the standard turbos at roughly 14 psi of boost at around 8,000 rpm and 300 horsepower with an aftermarket ECU.

Sep 16, 2023 · The 20B found in the Mazda Eunos Cosmo is unique in that it’s the only three-rotor engine Mazda ever put in a production vehicle. If having the third rotary isn’t enough to excite you, perhaps the sequential twin-turbocharger system will!

Jul 6, 2020 · This 1991 Mazda Cosmo is finished in two-tone silver and gray and powered by a twin-turbocharged, 20B triple-rotor Wankel engine. The car is one of 8,875 produced over a five year production run, was featured on BaT in 2017, and came to the seller in 2019 after winning “Best Import” at that year’s Amelia Island Festival of Speed.

This powerhouse delivers near-vibration-free acceleration, and with around 300 horsepower thanks to sequential turbos, it provides an exhilarating driving experience. The 20B engine is a rare gem, as only a limited number were ever produced, making this car even more unique.

Our services includes custom porting, installation, machining, and turn-key 13B and 20B 3-rotor engines. From factory stock to 1000+ hp 7-second 13B rotary power, all the way to 1400+ hp 3-Rotor power.