Originally posted by STSDRVR
During the break in, do you recommend around 15% Nitro fuel? If so, what do I need to do with the head shims and what head shim setup does the D5 come with? Is it optimized for 30% out of the box?
The D5 coming with total 0.5mm shims.It is optimized for 25-30% Nitro. I suggest you to use low %(5-15%) nitro to break-in your engine.If you plan to use 25-30%Nitro,you don't need to take out shims when breaking in.