I have the evo trainer engine on my sig LT40. When testing it the other day, it seems to really scream WOT. I had changed the prop from the 3-blade trainer prop to a 10x7. I also had taken the weight off the flywheel. Would a 11x6 slow the engine down a few rpms?? I took the limiters off the high speed needle and there is oil and smoke coming out the exhaust. It also wants to scream louder doing the pinch test so I feel its tuned right. Just nervous with this high RPM.