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McLaren MP4-29 - modified rear suspension blockers 08 June 2014

In Montreal practice McLaren tried out using just one (red arrow) of their rear suspension 'blockers', as opposed to the usual two (inset). These blockers, which are in fact bodied rear suspension elements, increase the performance of the diffuser and replace some of the downforce lost with the removal of the lower rear beam wing for 2014. However, they come with quite a high drag penalty. Perhaps not surprisingly, McLaren reverted back to the normal twin blocker set-up for qualifying and the race. When a car's aerodynamic working envelope is defined, the car and the components to achieve this envelope are all optimised and work together - removing any one of these components will change the car's characteristics and it will be very difficult to find something short term that is more efficient to replace it.