Just keep using nitro motors and you will inevitably become a pro.

I remember when I started out about 10 months ago, people said you could listen to a motor and tune it. And that you don't need a temp gun to tune. Well, now I am about there. When I marshal a race, I can hear the engines running too fat and the engines running too lean. I even stopped using a temp gauge the last couple races.

Just keep tinkering with the engines and soon you will be able to figure them out. They are not overly difficult, and yes... you have to tune every time out.

I have a Picco engine and it is awesome. Mine tunes easily and has A LOT of pinch after about 3 gallons.