Originally Posted by
Tree
From what I understand, making the hole in the body for the engine head larger will help reduce the chance of the fins breaking off. I have a about a 1/4 inch gap between my body and engine head and I have yet to break a fin.
hehe you beat me to it..1/4 inch might be a litle much.but only just..most people are lucky if they have 1-2mm..too close..cools better with a bigger gap too..