Aright, technically it was 15,780rpm peak on the APC 9x5 open exhaust on 5/25 fuel. It runs 15,900 or thereabouts with a .46 size Jettstream muffler and same fuel. No BS here. Chances are the .25 isn't anywhere close to be broke in if it is only turning in the mid 14s. My .30 has 3-4 gallons through it now, it only leaked at 13,500 on the same prop when new and just off the bench.
Last edited by 1QwkSport2.5r; 12-02-2014 at 04:09 PM.