Originally Posted by trickedout

heys guys and ron, first id like to say i was looking for my first "race" motor and after reading many pages of this thread i knew i couldnt go wrong, people love it, the man behind it loves it and stands behind unlike anything ive seen in this hobby!! so its on its way from amain and just had a question we normally run %30 in our cars but my last trip to the l/h/s they only had byrons gen 2 %20...i can get %30 before sunday(next race) but is there anything wrong with breaking it in on the %20 and then switch once i get the %30 for race day??