Sometimes, the dyno is the worse place to do testing
Car modification goes in cycles, in trends of popularity and enthusiasm. Sometimes stupid ideas are abandoned; other times they’re fervently embraced.
When I first started writing about car modification – it would have been back in about 1987 or 1988 – almost no workshops had dynos. Back then, performance claims were largely the stuff of description. You know, this exhaust will give your car just fantastic power, mate.
Pradoxically, some of the first companies to use dynos to ‘prove’ power gains were the very same companies that had no power gains to prove. But they knew that with so few dynos around, and with knowledge of how to fudge dyno figures commensurately low, their advertised dyno improvements would have credibility.
For a while at least.
But now every serious workshop has a chassis dyno. Mods which give no power gains are still being widely sold (polished throttle bodies, restrictive aftermarket cold-air intakes, exhaust systems with no engine management changes) but for the inquisitive, finding the efficacy of the mods is only a few dyno runs away. One dyno run at the place selling the goods and another at an independent workshop.
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