Originally Posted by
microsprint998
Hey guys I am going to break in my new nova rossi engine this weekend was wondering what percent fuel to use yes I did Google search and searched this form I have a size liters of sidewinder team fuel but it's 30% hoping that will be okay also should I touch the fact tory needle setting some ppl say yes some ppl say no i never have when breaking in my offroad reds motors but thought I would ask about the smaller size motors
5% Nitro break in fuel is what I use. If you intent to use 30% Nitro fuel for a .21 engine, I would recommend adding a 0.1 or 0.2mm shim between the sleeve and heatsink. The default needles setting for Novarossi is on the rich side. You should run your car for a few tanks before leaning the needles.