Originally Posted by jmaxey51

its 235, http://www.hobbyprousa.com/engines/arrow.html

and compared to the VZB line, this engine feels similar but IMHO will blow the doors off the VZB, its more power everywhere, its still smooth and all but its crazy fast. it screams. was really surprised by it. its closer to the VZB Speed imo but with a little more pep. about the same run time. mine still is new and i cant wait for it to fully break in and really make the power.



my understanding is that shim is used for 30% fuel. 20% for stock shimming. but im sure someone will have 100% definite answer.