Novak 10.5 motor timing

[chris_trcc]

im new to the timing of the brushless motors i just seem to buy and run the motor as it is. but as there people that just seem to outpower me i looked in to this method slighly. after trying to do correct pinion sizes, and hoping for a little advise. i know if i adjust the ring anti-clockwise it produces more rpm which i am after. but to what extend can i adjust is too without damaging the motor internally. the motor i got was 2nd hand and the ring was fully clockwise posision so now i got it set 2/3rds of the full movment is this ok? will it be best to run a cooler with a fan on to reassure the motor tempertures dont get high. cheers