Well either way its going to pick up rpms quicker you can't lose.. try a +4 timing advance as well. I highly doubt you will be disappointed... i personally have yet to get mine don'e on the blaster but any other of my 2 strokes i have no complaint.. and not only on my 2 strokes but also my drag cars.. my only issue is+4 timing with the lightened fly wheel..but from what i have seen it all seems to work well together..