Sounds about right when I was at the IIC 2 years ago and they had the locked 0 timing speed passion 17.5 motors running lrp sphere we were in the 105mm range but I know that motor timing is going to be key this time as yes all the manufactures have different versions of 0 atleast with novak you know it goes to 45 at full. Not sure where the duo2 is but at a certain point on the dyno it loses power for the return on timing about the 3rd tick from the end.

my 64 pitch pinion rack starts at 19 and goes to 60
another thing if you don't run them 41.5mm you don't have the tourqe to get the tires going so using bigger tires is out of the question.

Speaking of anybody got a RO for a 7.5 lrp and what timing notch to use with a BD on what profile? Just looking for some place not to blow it up.