# Cylinder compression — standard (NB1)

Canonical URL: https://miatatorque.com/spec/engine-compression-standard-nb1/

Applicability: NB 1999–2000 (BP-4W) — Other years inferred from 1999 factory evidence.

Confidence: fsm

1442 kPa {14.7 kgf/cm², 209 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": "engine-compression-standard-nb1",
  "name": "Cylinder compression — standard (NB1)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NB",
      "years": [
        1999,
        2000
      ],
      "engines": [
        "BP-4W"
      ],
      "note": "Other years inferred from 1999 factory evidence."
    }
  ],
  "kind": "non-torque",
  "value_text": "1442 kPa {14.7 kgf/cm², 209 psi} at 300 rpm",
  "procedure": {
    "notes": "Verify battery fully charged. 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 spark plugs and disconnect ignition-coil connector. Crank with accelerator fully depressed at 300 rpm and record maximum gauge reading for each cylinder. Values independently repeated in technical data 01–50–1 (PDF312)."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1999",
      "page": "01–10–5 (PDF p. 200)",
      "as_printed": "Compression\nkPa {kgf/cm², psi} [rpm]\nStandard\n1442 {14.7, 209} [300]",
      "verified_years": [
        1999,
        1999
      ],
      "document": {
        "id": "fsm-1999",
        "tier": 1,
        "title": "1999 Mazda MX-5 Miata Workshop Manual",
        "covers": [
          {
            "gen": "NB",
            "years": [
              1999,
              2000
            ],
            "engines": [
              "BP-4W"
            ]
          }
        ],
        "url": "https://www.mellens.net/mazda/Mazda-Miata-1999-2001.pdf"
      }
    }
  ],
  "jobs": [],
  "system": "engine",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/engine-compression-standard-nb1/"
}
```