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Hub Dyno Vs Rolling Road

ninja_geezer
ninja_geezer
in Ford Fiesta Club

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Hub dyno vs rolling road what is the best and why ?

  • Quote


    In theory a hub dyno gets you closer to measuring the actual power from the engine as it eliminates the losses from weight of wheels & tyres plus friction of tyres to rollers etc.

    But if you're after measuring (brochure) power at the actual crankshaft then there are still fiddle correction factors applied to quantify losses through gearbox and drivetrain.

    Also you can only really compare figures against similar hub-dyno runs though really any dyno figures are only comparable for that particular dyno.

    Seems to be so much smoke and mirrors involved when calculating power back to the crankshaft - was lot easier when I've had bikes dyno'd and power is taken at the wheel.

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    • The Digestive Forum Roundup (31st May - 7th June 2026)

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      The Digestive Forum Roundup (31st May - 7th June 2026) We hope you’re all enjoying your week and finding time for some time enjoying your Ford! This week, our vibrant forum has been buzzing with discussions that touch on a diverse range of Ford models, from the Mondeo to the Fiesta and Focus. Here’s a recap of some key conversations that might pique your interest. Starting with the Mondeo, user Frenchspanner shared a particularly frustrating issue relating to a 'Immobiliser Active' message appea
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