DYNO LABEL - WHAT DOES IT MEAN DYNO LABEL - WHAT DOES IT MEAN MRSSPOCK (Mechanical) (OP) 8 Jan 17 15:36 Can anyone please explain what the lowest line on this label means, i.e. the 4500 value Thanks PS Does anyone know where I might get a pdf for this model? RE: DYNO LABEL - WHAT DOES IT MEAN MRSSPOCK (Mechanical) (OP) 8 Jan 17 18:57 I figured it out. It is an equation, i.e. BHP = (W X N) ÷ 4500 The 4500 value is a constant which varies from one dyno model to another. W is load on the torque arm, and N is the turns per minute. RE: DYNO LABEL - WHAT DOES IT MEAN GregLocock (Automotive) 9 Jan 17 08:10 http://froudedyno.com/customer-services/older-dyna... Cheers Greg Locock New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?