The R-Box BMW has a lot of electrical features that need a lot of electrical power. This means that we need to use an upgraded alternator.
We are going to use a Denso style 155A version from Luke Motorsport. The pulley has been decreased to 60mm so the ratio becomes 1:1.6 with the cranck shaft pulley
This ratio gives us already sufficient charging current at idle speed.
Overdimensioned bearings allow >14.000rpm for the alternator.
The starter has also been boosted to 2KW to deal with the higher compression of the modified S14.
