I run an 84 and 13 in my pan car, I've run an 84 and 15 and the motor got quite hot (but it was run for almost 15 mins in a nitro final). The car hits just over 100 km/h with an 84 and 13. You could try the gearing you mentioned but i would only run it for 5 minutes at a time. If you are getting the LRP you will have to watch temps closer as the LRP doesn't have a temp cutoff. If you haven't seen an rc car go 100 km/h then you be surprised.
Sunshine Coast QLD AUSTRALIA
"If you stand still long enough you'll go backwards"
Last edited by Drewdc90; 12-20-2007 at 07:42 PM.