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| Camshaft Specifications | | Manufacturer | Comp Cams | | Part Number | 12-419-8 | | Type | Hydraulic roller | | Valve lift at 0.050 | 0.520/0.540-inch intake/exhaust | | w/1.6 rockers | 0.555/0.578-inch intake/exhaust | | Duration at 0.050 | 236 degrees/248 degrees intake/exhaust | | Intake centerline | 108 degrees | | Lobe separation | 113 degrees | | Dyno Details | | Headers | 23/4 Long tubes | | Advance | 36 degrees | | Fuel | 91-octane unleaded | | Max torque at rpm | 470.7 at 4,300 | | Max power at rpm | 458.0 at 5,700 | | Average torque | 447.9 | | Average power | 390.0 | | Nitrous Works Plate | 125-Shot | | Advance | 31 degrees | | Max torque at rpm | 641.2 at 4,500 | | Max power at rpm | 593.0 at 5,600 | | Average torque | 515.1 | | Average power | 455 | | Engine Balance | | Rod (rotating) | 434.8 g | | Rod insert | 46 g | | Oil allowance | 4 g | | Piston (w/ pin) | 535.2 g | | Rings | 35.3 g | | Rod (reciprocating) | 178.5 g | | Total rotating | 965.6 g | | Total reciprocating | 749 g | | Total bob-weight | 1714.6 g | | 385ci Buildsheet | | Specifications not listed are the same as stock. Except as noted, all dimensions are in inches or fractions thereof. All prices sourced through Speed-O-Motive. | | Displacement | 384.6 ci | | Bore x Stroke | 4.040 x 3.750 | | Compression | 10.30:1 | | Rod center-to-center | 6.000 | | Piston deck height | +0.006 | | Chamber volume | 72cc | | Rod-bearing clearance | 0.0020 | | Crank endplay | 0.0060 | | Piston-ring endgap | 0.020 top; 0.022 second | | Main bearing-cap torque | 65-70 lb-ft (moly-lube) | | Rod-bolt torque | 50 lb-ft (moly-lube) | | Head-bolt torque | 70 lb-ft (moly-lube) | | MOTOR ONLY | | RPM | Lb-Ft | HP | | 3,100 | 451.1 | 266 | | 3,200 | 448.3 | 273 | | 3,300 | 446 | 280 | | 3,400 | 446.9 | 289 | | 3,500 | 449.5 | 300 | | 3,600 | 453 | 310 | | 3,700 | 457.9 | 323 | | 3,800 | 461.1 | 334 | | 3,900 | 463.8 | 344 | | 4,000 | 466.2 | 355 | | 4,100 | 469.2 | 366 | | 4,200 | 469.8 | 376 | | 4,300 | 470.7 | 385 | | 4,400 | 469.8 | 394 | | 4,500 | 468.8 | 402 | | 4,600 | 467.6 | 410 | | 4,700 | 465.3 | 416 | | 4,800 | 462.5 | 423 | | 4,900 | 461.8 | 431 | | 5,000 | 457.7 | 436 | | 5,100 | 455 | 442 | | 5,200 | 449.1 | 445 | | 5,300 | 442.7 | 447 | | 5,400 | 439.7 | 452 | | 5,500 | 432.8 | 453 | | 5,600 | 426.6 | 455 | | 5,700 | 421.6 | 458 | | 5,800 | 414.7 | 458 | | 5,900 | 406 | 456 | | 6,000 | 399.5 | 456 | | 6,100 | 391.3 | 455 | | W/NITROUS | | RPM | lb-ft | Hp | | 3,100 | 431.8 | 255 | | 3,200 | 429.3 | 262 | | 3,300 | 429.1 | 270 | | 3,400 | 430.5 | 279 | | 3,500 | 432.3 | 288 | | 3,600 | 437.4 | 300 | | 3,700 | 445.6 | 314 | | 3,800 | 443.3 | 321 | | 3,900 | 443.4 | 329 | | 4,000 | 444.5 | 339 | | 4,100 | 450.8 | 352 | | 4,200 | 450.9 | 361 | | 4,300 | 466.7 | 382 | | 4,400 | 486.9 | 408 | | 4,500 | 641.2 | 549 | | 4,600 | 635.6 | 557 | | 4,700 | 627.2 | 561 | | 4,800 | 619.8 | 566 | | 4,900 | 611.6 | 571 | | 5,000 | 605.3 | 576 | | 5,100 | 595.6 | 578 | | 5,200 | 590 | 584 | | 5,300 | 582.9 | 588 | | 5,400 | 574.4 | 591 | | 5,500 | 564.2 | 591 | | 5,600 | 556.5 | 593 | | 5,700 | 546.8 | 593 | | 5,800 | 535.1 | 591 | | 5,900 | 525.4 | 590 | | 6,000 | 513.2 | 586 | | 6,100 | 501.1 | 582 |
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