revo pinion

I am converting my revo 3.3 to brushless and want to know what pinion to use, i am a newbie to electric, but not to rc's. I have ordered a feigao 7xl, and i am going to use a mmm v3, and zipp-h lipos ( 5000mah, 5s, 20-30c ). I will lock second gear, and the spur is a 38t. what pinion should i use if im going to race at a medium size track, and want to bash with some buddies. I can order a couple if i need.

[George16]

I'm currently using a 38/17 combo on my converted 3.3.

Did u lock second gear and what is the top speed?

o i also have a question for BrianG hehe how do i attach a fan to the motor, and what is the biggest one i can install on it.

[George16]

Originally Posted by Balls-to-the-wa

Did u lock second gear and what is the top speed?

I installed the single speed conversion plate. I have not gps'ed it yet.

In order to get the best runtime out a truck what is the best way to gear it. Is it best to make it so the motor is undergeared, overgeared, or about perfect?

[George16]

It's best to have it in between. Undergearing and overgearing can be inefficient and can also cause high operating temps.

the feigao will run pretty hot on 5s, I would suggest a 10XL

will that 17/38 gearing about right for my revo then, or will i need a different one. will a 5s 5000 mah 20-30c last longer than the 4s version in my truch?

sorry didnt see your post, i dont want to switch motors i already have the 7xl, i will pob swith it out later though

Originally Posted by Balls-to-the-wa

sorry didnt see your post, i dont want to switch motors i already have the 7xl, i will pob swith it out later though

Feigao 7XL will run hot in a Revo geared that high, you might want to run closer to 15/40, the Neu and Medusa motors have a much better design and will produce less heat

yeah i will prob switch do a nue after awhile, but 15/40 should be perfect for the 7xl , and will make it run as cool as a feigao can?