Updated specs are available.
Compression pressure — minimum (NA6)
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Not yet checked against the factory manual for your car's year. It's verified in the 1990 Mazda MX-5 Miata Workshop Manual; later manuals may differ.
135 psi (932 kPa; 9.5 kg/cm²) - 300 rpm932 kPa (9.5 kg/cm², 135 psi) - 300 rpm
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Warm engine to normal operating temperature; fully charged battery, all spark plugs removed, ignition-coil connector disconnected, accelerator fully depressed. Record maximum pressure while cranking; compare all cylinders at the specified 300 rpm.
Applies to
- NA 1990–1993 (B6) — Other years inferred from 1990 factory evidence.
- Verified in: 1990 Mazda MX-5 Miata Workshop Manual
Sources (1)
View 1 source citations
Page B–10 (PDF p. 37) · Printed value & notes
Part no. 1193-10-89CPage B–10 (PDF p. 37)Printed: “932 kPa (9.5 kg/cm², 135 psi) - 300 rpm”
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