tarmac rally - race

Audi AEB, AWT turbo engines

I-4cyl 1.8L 20v DOHC (DTH/DTH)

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225hp engines have an extra lower shim of 0.6mm at the exhaust spring due to higher turbo pressure. The maximum allowed lift when using the std spring setup is reduced to 9.4mm! It is required to modify the spring setup in this case.

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chilled cast iron camshafts with 2 non adjustable chain sprockets at reference cam timing: partnumber 10156xx hydraulic or 10157xx mechanical

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ONLY for dirt track applications and pro street use with adjustable engine management or carburettors

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FOR COMPETITION APPLICATIONS ONLY. Following details must be verified:

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the camshafs must turn smooth in the cylinderhead, provide free travel by machining where needed

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distance between valve seal and retainer at full lift must be 0.6mm at least

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minimum valve spring travel of 1.0mm at full lift must be provided

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distance between valve and piston 1.0mm (pref. 1.5mm). check 5-15° before TDC on exhaust, and after TDC on intake