Chrysler Chrys 2021 354 630HP Specs
Chrysler Chrys 2021 354 630HP engine specs: 354 ci (5.8L), 8-cylinder, 4.07" bore x 3.4" stroke, 12.5:1 compression.
Dimensions
| Displacement | 354 ci / 5.8 L |
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| Bore | 4.07" |
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| Stroke | 3.4" |
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| Cylinders | 8 |
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| Configuration | V8 |
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| Compression ratio | 12.5:1 |
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| Rod length | 6.3" |
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| Rod ratio | 1.853 |
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| Bore/stroke ratio | 1.197 |
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| Piston deck clearance | 0" |
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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 | 630 hp |
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| Years | 2021 |
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What these numbers mean
| Bore/stroke character | 1.197 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,400 ft/min — conservative for a street engine |
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| Rod ratio | 1.853 — long — less side loading on the cylinder wall, favours high RPM |
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| Displacement per cylinder | 44.3 ci |
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| Static compression | 12.5:1 — high enough that pump premium or better is normally required |
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Cylinder head
| Intake valve diameter | 2.2" |
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| Exhaust valve diameter | 1.68" |
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Similar engines
Source: NHRA blueprints — nhra.net blueprints
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