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Olds Dyno Information

From June 7 Auto Enthusiast Weekly

Dan Jensen - June 07, 2013 09:00 AM

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All dyno runs measured from 3,200 to 5,000 rpm
Factory rating based on 8.5:1 compression, twin turbo, injected and big cam)
Baseline run included 36 degrees timing, 70 jets, 40 metering rods, G hanger, BH 2ndry rods (.0397-inch medium tip), Brad Penn 30W oil, 110 octane fuel, stock manifolds with 2.5-inch mandrel downpipes and 2.5-inch exhaust pipes.

Torque
Factory Rating – Peak torque 626.0 at 4,500 rpm
Desktop Dyno Projection – Peak torque 526.0 at 3,000 (average 497.6)
Baseline run – Peak torque 504.2 at 3,400 (average 475.2)
Run #1 (Leaner AY, 2ndry rods, .0567-inch long tip) - Peak torque 508.0 at 3,300 (average 481.7)
Run #2 (Leaner CL, 2ndry rods, .0667-inch long tip) - Peak torque 512.7 at 3,400 (average 486.7)
Run #3 (Leaner DP, 2ndry rods, .0686-inch short tip) - Peak torque 516.6 at 3,300 (average 487.4)
Run #4 (Raise timing to 40 degrees) - Peak torque 510.9 at 3,300 (average 483.8)
Run #5 (Lower timing to 33 degrees) - Peak torque 519.8 at 3,300 (average 488.4)
Run #6 (Install six-inch exhaust pipes) - Peak torque 522.9 at 3,300 (average 495.3)
Run #7 (Install GM air cleaner base) - Peak torque 524.1 at 3,300 (average 500.3)

Horsepower
Factory Rating – Peak horsepower 659.0 at 6,250 rpm
Desktop Dyno Projection – Peak horsepower 423.0 at 5,000 (average 375.0)
Baseline run – Peak horsepower 410.7 at 4,900 (average 368.7)
Run #1 (Leaner AY, 2ndry rods, .0567-inch long tip) - Peak horsepower 418.4 at 4,900 (average 373.9)
Run #2 (Leaner CL, 2ndry rods, .0667-inch long tip) - Peak horsepower 422.7 at 5,000 (average 477.8)
Run #3 (Leaner DP, 2ndry rods, .0686-inch short tip) - Peak horsepower 419.4 at 4,900 (average 378.0)
Run #4 (Raise timing to 40 degrees) - Peak horsepower 418.5 at 5,000 (average 375.4)
Run #5 (Lower timing to 33 degrees) - Peak horsepower 414.4 at 4,800 (average 378.6)
Run #6 (Install six-inch exhaust pipes) - Peak horsepower 427.4 at 4,900 (average 384.4)
Run #7 (Install GM air cleaner base) - Peak horsepower 433.2 at 4,800 (average 388.7)

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