tarmac rally - race

Volkswagen 827 (mechanic tappets, 8mm valves, RK-8H)

(DTs/DTs)

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if required, machine cylinder head and / or use solid shims to adjust spring load

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ONLY for 8mm valves with single groove (RK-8H valve keepers)

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- camshafts for use with original cam followers (35mm) and lash adjustment shim (31mm) between cam follower and cam lobe

- race cam followers can not be used in these engines

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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

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ONLY for use in competition engines with independent engine management (throttle position sensor) or carburettors