# Compression pressure — standard (NA6)

Canonical URL: https://miatatorque.com/spec/compression-pressure-standard-na6/

Applicability: NA 1990–1993 (B6) — Other years inferred from 1990 factory evidence.

Confidence: fsm

1,324 kPa (13.5 kg/cm², 192 psi) - 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-na6",
  "name": "Compression pressure — standard (NA6)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NA",
      "years": [
        1990,
        1993
      ],
      "engines": [
        "B6"
      ],
      "note": "Other years inferred from 1990 factory evidence."
    }
  ],
  "kind": "non-torque",
  "value_text": "1,324 kPa (13.5 kg/cm², 192 psi) - 300 rpm",
  "procedure": {
    "notes": "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."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1990",
      "page": "B–10 (PDF p. 37)",
      "as_printed": "1,324 kPa (13.5 kg/cm², 192 psi) - 300 rpm",
      "verified_years": [
        1990,
        1990
      ],
      "document": {
        "id": "fsm-1990",
        "tier": 1,
        "title": "1990 Mazda MX-5 Miata Workshop Manual",
        "part_number": "1193-10-89C",
        "covers": [
          {
            "gen": "NA",
            "years": [
              1990,
              1990
            ],
            "engines": [
              "B6"
            ]
          }
        ],
        "url": "https://archive.org/details/1990-mazda-mx-5-miata-workshop-manual_202411"
      }
    }
  ],
  "jobs": [],
  "system": "engine",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/compression-pressure-standard-na6/"
}
```