no get a temp gun, and break it in via temp. the engine whilst you have it on the bench for the first tank (wheels not contacting anything) should be reaching 90 to 100 degrees celcius. anything lower and it is too cool.
if it is 80 degrees or less, either you are not blipping the throttle enough (blip it, and slowly rev it up then drop, repeat. don't floor it for the first tank)
or it is just oo rich. try covering the heatsink with aluminium foil, if this does not increase the temps (take foil of to check temps) then it is too rich, lean it a fraction.
for the second tank do about half a tank ont he bench with the same "blipping" and "slow increase throttle" technique, the put it on the ground and drive it around graduating the throttle input, ie, slow gradual build ups of throttle, and short sharp revs, kep the car constantly moving, don;t be too preocupied about themp at this point.
do this for another tank.
now take it to a park or wherever, and drive it. check the temps. they should be around 100 to 130 (this really reeeeeeealy depends on your fuel and plugs used).
once this has been done. after run it, then do final tunes at the track. when track tuning don't take notice of your temp gun, just tune so that it is consistent in it's power and the car does not become slugish out of the corners after say 3 minutes of constant hard racing. if the car becomes soft out of corners after 3 minutes or so of hard racing the low end is slightly lean richen it 1/8th.
at top end WOT the car should blowa trail of smoke exiting the corner ( a bit not an enourmous amount) and the smoke trail should become very small, to none by the end of the straight.
always ask for help from an experienced person when breaking in at the track, as looking for the signs of a well tuned motor can be hard sometimes. clutch setup is also a major factor, but you'll get confused if too much info is thrown at you at once, so leave this to later
