Boxster (986) F6-2.5L (1998)
Camshaft: Description and Operation
Camshaft:
The exhaust camshaft is driven by the intermediate shaft via a duplex roller chain with a transmission ratio of 0.75:1 (21 teeth on the intermediate shaft
and 28 teeth on the camshaft) so that the overall transmission ratio of 0.5 :1 is produced for the crankshaft relative to the camshaft.
The intake camshaft is driven by the exhaust camshaft via a simplex roller chain with a transmission ratio of 1:1.
All four camshafts are hollow-cast from high-quality hardchilled steel.