WORLD RAL­LY­CROSS

Motor Sport News - - Ohlins Dampers -

World Ral­ly­cross Cham­pi­onship races might only last around four min­utes, but the ex­treme in­ten­sity of the dis­ci­pline makes it a uniquely dif­fi­cult chal­lenge for Ohlins. Watch a WRX round and just over two-thirds of the cars will be us­ing Ohlins prod­ucts, in­clud­ing Sebastien Loeb’s Peu­geot 208 WRX, run by Team Peu­geot-hansen.

“For ral­ly­cross, you need a very good com­bi­na­tion of car con­trol and grip,” says Jarl­mark Nafver. “You need the gravel grip and the car con­trol and pre­ci­sion to over­take us­ing the very small gaps you are given. It’s one of the most com­pli­cated things that we do.”

The ALR TPX/TTX range of dampers is used for ral­ly­cross. The TPX is a three-way ad­justed Macpherson strut de­sign, the TTX a three-way ad­justed twin-tube damper. And in terms of ro­bust­ness, noth­ing is as chal­leng­ing as in ral­ly­cross, where dampers must with­stand peak loads in the 50-60 kilo­new­ton (kn) range, which is more than six times the max­i­mum you might face on a cir­cuit.

“In ral­ly­cross, the car has to cope with so many dif­fer­ent sur­faces in such a short time, which is when it’s ben­e­fi­cial to have ad­di­tional fea­tures to ad­just. The peak loads we see tend to be some­where in the re­gion of 50-60kn, al­though you also have to make them strong enough to sur­vive car-to-car im­pacts.”

Re­mark­ably, a set of Ohlins ral­ly­cross dampers can last the full sea­son, al­beit with the need for them to be ser­viced be­tween events to change com­po­nents like valve parts. What’s more, the topend dampers are sim­i­lar tech­nol­ogy to the en­try-level af­ter-mar­ket dampers avail­able from Ohlins.

“The damper struc­ture is sim­i­lar all the way from the af­ter-mar­ket dampers to the fac­tory gear,” says Jarl­mark Nafver. “But at the top end it’s more about added fea­tures and im­proved per­for­mance in every sin­gle

de­tail.”

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