Mazda RX-8 13B-MSP Notes

Public reference documentation for the Series 1 Mazda RX-8 and its 13B-MSP Renesis rotary engine — torque specifications, logged engine data, and a full oil metering pump guide.

This section documents my experience working on the Series 1 Mazda RX-8 and its 13B-MSP Renesis engine. It exists to share what I’ve learned and measured, and to help anyone working on their own car or rotary project.

What sets the Renesis apart from earlier Mazda rotaries is its side exhaust ports. Moving the exhaust ports from the rotor housings to the side housings reduces intake/exhaust overlap, improving efficiency and emissions while keeping the character that rotary owners love. It also changes how the engine is lubricated — which is why the oil metering pump gets its own full guide here.

A note on accuracy: these pages are carefully researched reference notes, not a substitute for the Mazda workshop manual. Always confirm torque values, procedures and specifications against the correct service information for your exact model year before working on your car.

Reference Pages

Torque Specifications Factory torque ranges for the Series 1 (6-port, 231 PS) — engine, drivetrain, brakes, suspension and steering fasteners, with assembly notes.

13B-MSP Engine Running Data Real logged data from a running 13B-MSP: oil pressure and temperature across the rev range, and a reconstructed map of the stock oil metering pump’s delivery from idle to 9,500 RPM.

Oil Metering Pump (OMP) Guide A full breakdown of the Series 1 OMP system — how it works, how to diagnose it (including fault codes), how to remove and service it, and the surrounding topics of nozzles, premix and clean oil feed systems.