# Compression pressure — standard (NB2 non-turbo)

Canonical URL: https://miatatorque.com/spec/compression-pressure-standard-nb2/

Applicability: NB 2001–2005 (BP-Z3) — Other years inferred from 2005 factory evidence.

Confidence: fsm

1,363 kPa {13.9 kgf/cm², 198 psi} at 300 rpm

Always confirm against your factory manual. Match every restriction and follow all stages and procedure notes. Disputed claims must not be automatically resolved. The complete record below preserves every printed unit, source claim and procedure.

```json
{
  "id": "compression-pressure-standard-nb2",
  "name": "Compression pressure — standard (NB2 non-turbo)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NB",
      "years": [
        2001,
        2005
      ],
      "engines": [
        "BP-Z3"
      ],
      "note": "Other years inferred from 2005 factory evidence."
    }
  ],
  "kind": "non-torque",
  "value_text": "1,363 kPa {13.9 kgf/cm², 198 psi} at 300 rpm",
  "procedure": {
    "notes": "Fully charged battery. Warm engine to normal operating temperature, stop and allow to cool about 10 min. Perform factory fuel-line safety procedure and leave fuel-pump relay removed, remove all spark plugs, and disconnect ignition-coil connector. Fully depress accelerator while cranking and record maximum gauge reading for every cylinder. Reference test speed 300 rpm. Use 1363 kPa for naturally aspirated NB2 and 1442 kPa for turbo; prefer the engine-specific compression procedure over the conflicting early technical table."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-2005",
      "page": "Compression Inspection (PDF p. 639)",
      "as_printed": "Standard\n1363 {13.9, 198} [300]",
      "verified_years": [
        2005,
        2005
      ],
      "document": {
        "id": "fsm-2005",
        "tier": 1,
        "title": "2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2005,
              2005
            ],
            "engines": [
              "BP-Z3"
            ]
          },
          {
            "gen": "NB",
            "years": [
              2005,
              2005
            ],
            "engines": [
              "BP-Z3-TURBO"
            ],
            "trans": [
              "6MT"
            ]
          }
        ]
      }
    }
  ],
  "jobs": [],
  "system": "engine",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/compression-pressure-standard-nb2/"
}
```