Idle lope was noticeably more pronounced and vacuum measured 12 in-hg at 1,000 rpm. This move in the torque curve was most noticeable in the lower end of the rev range, with substantial torque losses below 4,000 rpm.
Up top, we now recorded 599 hp at 6,100 rpm, gaining in both output and usable rpm, however, the bump of 12 hp up top shaved 8 lb-ft from peak torque, and shifted the torque peak higher up the rev range. The dyno numbers showed a textbook example of what is gained and what is lost as the cam timing is increased. We expected the increase in lift and duration to tap into more of the excellent high-lift airflow of the AFR heads, and bump top end power. Every Crane camshaft is made from induction hardened alloy steel using the industry's most accurate manufacturing processes to ensure unbeatable power gains. The upsized cam featured a significant jump in lift, shoving the valves to well over the. Once the best-kept secret of high performance engine builders, camshafts from Crane Cams have been at the center of the action in hot rods, circle track racers, and dragsters since 1953. We tore the engine down as it sat on the dyno for the cam change, retaining everything else exactly as it was in our previous combination. 050, a neighborhood that is popular with today's street performance enthusiasts. Our next step in cam size moved up to 234/242 degrees duration at.
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