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  HPD ARX-03a
 

  Article Image gallery (25) Specifications  
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Country of origin:Japan
Introduced in:2012
Designed by:Wirth Research for HPD
Predecessor:HPD ARX-01e
Successor:HPD ARX-03c
Author:Wouter Melissen
Last updated:September 27, 2011
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Click here to download printer friendly versionSubstantial regulation changes, aimed at capping the performance of the prototype racers, effectively promoted the existing LMP2 cars to the top level LMP1 ranks. Among these cars now potentially aiming for outright victories at events like the 24 Hours of Le Mans and the Sebring 12 Hours was the HPD branded and Courage-based ARX-01.

The American based Honda Performance Development took up the challenge and with the help of longtime partner Wirth Research created the ARX-01e. This evolution was sadly only raced once by Highcroft Racing but immediately showed its potential by finishing a surprisingly close second at Sebring. Limited funding prevented further outings and all other HPD customers instead opted to run the newly developed LMP2 version of the ARX-01.

Having relied on existing chassis built many years earlier by ATR for Courage, HPD decided to start off the 2012 season with a clean sheet. Although still based on the tried and trusted design, fresh carbon-fibre monocoques were constructed, labelled ARX-03a (LMP1) and ARX-03b (LMP2). Most of the changes to the chassis focused on relocating the suspension mounting points to better suit the latest tyre developments.

The suspension itself is wholly conventional with double wishbones and push-rod actuated dampers and coil springs on all four corners. Another familiar component is the 3.4 litre V8 complete with direct injection for better performance and mileage. Although no performance figures have been released, it is believed the naturally aspirated engine produces over 500 bhp. This is mated to a HPD modified Hewland six-speed sequential gearbox.

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  Article Image gallery (25) Specifications