we,ve never had the chance or opportunity or time /financial inclination to do any sort of "back to back "testing on the dyno ourselves to either prove or disprove that these modified cranks provide more power in the simple case of a crank swap from full circle to modified.
and why would we bother ..as to do so would be not only confusing but futile and pointless as i,m sure your aware ..
LPC ratio motors require special pipes etc etc to make them work to that advantage.
and also ,there are many other ways to lower primary comp ratios and other factors which come into account.
its just not a simple matter of full circle cranks verses cut /modified cranks is it.because the size and duration of inlet ports /transfer ports etc all affects the volume and crankcase comp ratios.
for eg ,you could have a full circle crank in ported cases or un ported cases,or even a bigger diameter full circle crank in that would give you more volume between the webs and so more volume and lower primary comp.
and so,perhaps ...this whole debate /topic would make an interesting article in scootering mag given your contacts,means and resourses ..and investagative attributes to unravvle the complexatives surrounding this and give us all some deffinitive answers .as i for one would appreciate that.
all i can re itterate ,is that the lower primary comp ratio thing seems to work in certain cases ,and with certain specs...and that i,m just being intuative here and going by experience ,feedback and gut feelings that have been confirmed so far.
