Thanks Daz.
That confirms what I am getting out of mine on a 560C Barcrusher, 4000RPM = 40km/hr, 5000RPM = 51/52, and WOT @ 5800RPM = 60.
Thats the figures from the first run I have had in it, will be testing it further. Ideally, I would like to get a few more km/hr in the range 4000 - 5000.
Scott.