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For our final series of dyno pulls, we swapped the timing curve chip for a slightly more aggressive curve. Thanks to the heavy-duty valve springs and Hot Cam we were able to wind the LS1 up to 6,600 rpm where the peak power crested at 503 horsepower. At just over 6,700 we experienced severe valve float so 6,600 rpm was now our limit. Peak torque crested just short of 450 lb.-ft. at 4,900 rpm. GMPP noted that the push rods would also extend the rpm range of the engine, which we'll be sure to install before we make it back to the dyno. View Related Article
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