builing 8.5 brushless???

Was thinking about putting my hyper 8.5 back together for son and making it brushless. I was going to use the castle system 2200kv. With 2 7.4 5000. No brake servo, and what would you guys thik for a pinion for a good starting point. This will be my first electric 8 scale. And please dont recomend the novak system. Never again.. But any helpfull thoughts wouold be great or advice. THANKS

[brushlessboy16]

http://scriptasylum.com/rc_speed/_top_speed.html

Great tool to help decide- depends on what speed you want to gear the car for

[tc3_racer_001]

have a look at my thread for some build details. (i.e. things which must be worked around with the centre diff...

anyway i run with a 1512 2d with a 13-16t. id suggest starting around 15 with stock spur?
hope this helps. btw, doing wheelies is FUN!

i am builing the car for my 6 year old. But he still will want to race it. I was just looking for a decent starting point. everything on the car will be stock. But was looking for a pinion gear to start and keep temps down and gear from there. Thanks for the advice.

15t is good starting point. I'll be gearing my Mugen 17/46 for roughly 43 mph, running a nue 1515 1y, the motor that the castle motor is based of of. 2200 kv on 14.8v. I have a 15 if I need to gear down, but temp wise it should be fine. I ran that same motor in a converted revo. It a lighter buggy it should be just silly.

thanks for the help guys. i think ill order the 15,14,16,17. just to have a option. but ill start at 15 and work from there.

[tc3_racer_001]

it will be balistic on 17t. what batteries are you planning to use? ive had good performance (i,e, wheelies...) with zippy 4800's. glad i got them when i did, now they arent such great value (exchange rate) for me. not sure where you are from though.

ya i will wind up gearing for track and conditions and size and temp was just looking for a starting point\. speed isnt to important because he will be racing it. but i will gear it to rip up on the nitro's