Originally Posted by
LonnyJ1950
At the recent SWIGP on a 35 x 100 mildly technical track, most were around 80mm. I would start around there and adjust for your conditions.
hmm ok. most of the guys at my track are running at 90 and ive run everything from 83 to 96 and 93 has seemed best but im still down on power a bit. what spur were they running? I have a 78 on there now and thinking about changing it....