Originally Posted by
bigmatt
rex do you reshim your engines after they are broken in? and what shim stack would you rec. for 30% nitro?
I do not use the break in shim, after a gallon or so I take one of the brass shims out. There should be only one alum and one thin brass shim for 30%, I say thin brass shim because I think the break in shim is a thicker shim.
Rex