Originally Posted by
airraptor
Yeah the 9x8 needs a light low drag set up. the 10x6 should turn over 18,000 also but not 100% on that as I never put one on my 60LX.
The advertised power when I bought this engine was 18,000 on an APC 10x6 and Powermaster 15% fuel. That of course is with the gold Jettstream muffler. I'd guess the full pipe should get it to peak over that although I haven't been able to peak it yet. Every time I tried to peak it (seriously just so I knew where it really peaked) it would pop a plug. So I have a little more work to do with it. If it keeps popping plugs, I might go a little cooler on the heat range before adding a head shim.