Right from Andrews Tech:
According to Andrews, anybody with a bumped compression ratio is in for some pinging. It also seems a Cometic .030 is a major NO-NO with this cam.George, Yes either the 26 or the 37Cams would be a good choice.
With the 26's your compression ratio would need to be slighhtly
lower. 9.0 would be perfect. These cams build cylinder pressure very fast and higher compression may cause detonation. The 26's have an awesome low speed power band 1800-5200rpm. The 37's are very close 2200-5600rpm they come on a little later and so doe's thier torque. I would consider the 37's
more of a Hotrod cam. Where as the 26's may be considered more of a touring cam. Touring for Bikes that are heavy,traillering, two up riding or climing hills. Both of these cams have a power band that gives them good Hiway performance.