Originally Posted by
dan_vector
Add 0.1 - 0.2 from stock. I wouldn't recommend 25% on the .12 engines as they are designed for 16%. I certainly wouldn't break the engine in on 25%!
wow,this is news to me. I have been breaking in and racing .12's for over 15 years on 30% and never had an issue. been in nitro for over 30 years and always break in any motor (car,boat,etc) with what ever % I plan on racing with it.