Motor (Australia) - - BACK SECTION -

The fur­ther the IDR racer goes up the hill, the less down­force it has, due to de­creas­ing air pres­sure. VW reck­ons on av­er­age 35 per cent of IDR’s down­force is lost com­pared to run­ning at sea level, so Porsche’s Weis­sach wind tun­nel was used to sim­u­late the at­mo­spheric con­di­tions dur­ing the de­vel­op­ment of the body­work.

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