WHAT’S IN THE NUM­BERS?

4 x 4 Australia - - Driven -

AN­DREW’S Patrol is fit­ted with a Har­rop 2.3L FDFI2300 Su­per­charger Kit, boost­ing at 7psi. The Har­rop FDFI2300 kit ($10,989) is a twin ro­tor su­per­charger with Ea­ton’s Roots-type TVS in­ter­nals. In force-fed sys­tems there are two fig­ures that mat­ter: how much air is go­ing in, and how hard it’s be­ing pushed. Two large ro­tors force 2.3 litres of air into the en­gine at 7.3 psi, or half of one at­mos­phere of pres­sure, for ev­ery ro­ta­tion of the su­per­charger. More air go­ing in equals more power. Sim­ple stuff.

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