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TurboRX7

The ultimate resource for rotary engine RX-7s — factory documents, rotary engine fundamentals, and PowerFC tuning guides.

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Rotary Basics

Covers the 13B 2‑rotor and 20B 3‑rotor engines — both production and racing variants. Includes a GT35R single turbo build image gallery, various rotary engine photos, and wideband datalogging information.

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TitleDateExcerpt
Checking Mazda Rotor Housing Flatness With a StraightedgeA rotor housing can look serviceable while its sealing faces have enough distortion to affect apex-seal contact, compression and coolant sealing. Checking…
13B-REW Torque Specs and Clearance ReferenceThe Mazda 13B-REW rewards careful assembly. Its compact rotary layout leaves little room for guesswork, and an incorrect torque setting or seal clearance can…
Essential tools for a first-time rotary engine rebuildA first rotary engine rebuild rewards patience, clean working habits and accurate measurement. The Mazda 12A, 13B and 20B share a compact design, yet their…
Rotary Engine Rebuild Sequence From Teardown to AssemblyA rotary engine rebuild rewards patience, accurate measurement and disciplined organisation. The basic process applies to Mazda 12A, 13B and 20B engines,…
How to Identify a Factory Turbo Mazda RX-7A genuine turbocharged Mazda RX-7 can be worth considerably more than a naturally aspirated car or a convincing turbo conversion. The challenge is that…
SA22C Limited Editions And The Mazda Savanna RX-7 StoryThe SA22C was Mazda’s first-generation rotary sports car, sold in Japan as the Savanna RX-7 and known in many export markets simply as the RX-7. Its compact…
FC3S GXL And GTU: Option Packages And Production NumbersThe FC3S Mazda RX-7 was sold in a wide range of specifications between 1985 and 1992, and the badges do not always describe the same equipment in every…
1993 FD3S Type R vs Type RZ Equipment and WeightThe 1993 Mazda RX-7 FD3S Type R and Type RZ were built around the same compact twin-turbo rotary formula, yet they targeted slightly different owners. The Type…
JDM vs USDM RX-7: what Australian rotary fans need to knowThe Mazda RX-7 remains one of the most adored Japanese sports cars ever produced, and Australian enthusiasts are uniquely positioned to enjoy both Japanese…
Production Numbers by Year: How Many FD3S RX-7s Were BuiltThe third-generation FD3S Mazda RX-7 occupies a strange place in the minds of rotary enthusiasts: a car that everybody wanted, few could reliably afford new,…