Pontiac Firebird SD-455 Engine - New-Age Super Duty
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When the T/A arrived at Ida Automotive, it looked as if it were 1974 all over again. Bob Ida uses Dynojet brand test equipment, which is inertia-based. The tires are on drums, and the dyno measures how quickly the drum accelerates and mathematically calculates horsepower and torque from that data. It is able to do that because the software knows exactly how much the dyno drum weighs. Though we experienced bad luck, an inertia-based dyno actually puts less stress on the driveline than a full-throttle pass at the dragstrip. The engine in the T/A was on borrowed time; the dyno test had nothing to do with its failure. View Related Article
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