GMC Vortec 4300 (4.3L V6) 9.2:1 Specs
GMC Vortec 4300 (4.3L V6) · 4.000" × 3.480" · 9.2:1 engine specs: 262 ci (4.3L), 6-cylinder, 4" bore x 3.4803" stroke, 9.2:1 compression.
Dimensions
| Displacement | 262 ci / 4.3 L |
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| Bore | 4" |
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| Stroke | 3.4803" |
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| Cylinders | 6 |
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| Compression ratio | 9.2:1 |
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| Bore/stroke ratio | 1.149 |
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Construction
| Block material | cast iron |
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| Head material | cast iron |
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| Valvetrain | OHV |
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| Fuel type | gas |
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| Advertised HP | 180–195 hp |
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What these numbers mean
| Bore/stroke character | 1.149 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,480 ft/min — conservative for a street engine |
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| Displacement per cylinder | 43.7 ci |
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| Static compression | 9.2:1 — low by modern standards, generally happy on regular pump fuel |
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Variants sharing these dimensions (3)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
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| — | 180 hp | LF6 |
| — | 190 hp | L35, LU3 |
| — | 195 hp | LGN |
Vehicles (9)
- Chevrolet Express
- GMC Savana
- Chevrolet S-10
- GMC Sonoma
- Chevrolet Blazer
- GMC Jimmy
- Oldsmobile Bravada
- Chevrolet Silverado 1500
- GMC Sierra 1500
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