174mcx
Active VIP Member
I had chuck build a few motors, likely he couldn't get low compression pistons when this one was being built so switched for the shim. If you want my opinion, run 50% premium and 50% c111 or c12 and turn the boost up to 15-20lbs and hang on. Do you know what you have for clutching? weight model, actual weight, primary spring, secondary helix, secondary spring and wound rate?