Not everyone wants to spend $250+ for a high performance engine - especially if they already have a pile of engines. A couple hours with some hand files and a little finesse and you can have a low rpm slugger churning some decent rpm. I know a guy getting over 18,000+ on a 9x8 APC from an Italian Super Tigre .45 that was hand modified. Modifying buggy/RC truck engines is very common. It's amazing what just a little work on the crank can get you! At least 50% of the power boost-ability is in modifying the crankshaft alone.
Oh, and on the comment about the OS fan engine - their horrible liners peel if you don't handle them with the utmost of care. Not a good benchmark for "performance" or "quality".
Last edited by 1QwkSport2.5r; 04-13-2017 at 04:33 PM.