BMW AG Presse - BM Bikes, BMW Motorcycle Information

BMW AG Presse
The engine of the R 1100 8 stands out visibly at first sight from the other
power units in the range by way of new cylinder head bolts with three
protruding fins on the lower side and the designation "Magnesium" at the top.
The significant reduction in weight provided in this way versus the aluminium
version adds up on the two cylinder head covers to a total of 800 grams.
The following technical improvements and modifications make this
increase in power and performance possible or were introduced in the
process for the first time:
. Appropriate design of the pistons allowing an increase in
compression from 10.7 to 11.3.
. Optimisation of intake air flow and the use of a plate air filter instead of a
circular filter ensuring a better flow of air allowing the engine to "breathe"
even more efficiently than before.
. Due to the increase in maximum engine speed from 7900 to 8400 rpm
(where speed is then cut off, the engine requires new, forged connecting
rods.
. Bosch Motronic MA 2.4, the digital engine management system also
featured on the R 1200 C and K 1200 R8, has been further modified to
provide a perfect match for the new machine. Introducing Motronic MA 2.4,
BMW was incidentally the first manufacturer in the world to use a mobile
diagnosis test computer (MoDiTeC) serving to keep service and repair
times to a minimum.
. To improve the lubrication of highly exposed engine components such as
the crankshaft and connecting rod bearings, oil circulation in the crankcase
has been optimised by modifying the engine housing - an improvement
now to be found on all other Boxer models, too. At the same time engine oil
volume has been increased by 0.35 litres to 4.10 litres (together with a
change of fiIter ).
. About 70 per cent of the extra power comes from the R 1100 80S new
exhaust and muffler system to be described in greater detail in the
following.
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