Mark, I run an 8.5 V3.0 on 28/78 outside and 25/78 inside (RB5 is 2.6:1 internal). I played with gearing a lot last seasion and it really likes to be geared high ... I kept going up until I started getting worried about temps and it felt better and better on the track with each extra tooth! Timing is set to level 8, DDSS to around 7 for indoors.
As a comparison the V3.0 6.5 I had in on friday was geared 25/78 ... these SP motors like to be geared higher, they are smoother but don't rev like an LRP .... exactly my reasons for choosing them.
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