Originally Posted by Werks

It takes a while lol. I would caution you though on using the WOT (wide open throttle) method to break in engines as it puts a lot of stress on the rod etc. We used to use this back in the days when I was running on-road if we were in a pinch i.e. your at a big race and blew your motor and have to break one in quickly. The only time that we did this though was if we were at a big race and we blew a motor and were in a pinch lol! If you break in your engines the WOT way best bet just to be safe is to change the rod after a couple of gallons. With off-road engines you may or may not get away without doing this because they are not subjected to the high rpm's like on-road engines but with engines that have a lot of pinch like I hear this line of engine has I would just play it safe and replace it. My personal experience over the years has been that the best results are achieved just breaking the engines in the car under load, on the track starting from a rich state of tune and progressively reducing the amount of lubrication (leaning it our) while progressively increasing the amount of load (going faster). Just my $0.02!