skygreen67

K well its always good to have a variety of different sizes and different materials so ill pick up a set of them too... besides (and im only guessing) they should be more durable than the aluminum ones... also do you think theres any point of getting pinions under 14t or over 19t? Ive been keeping my eye on a set of 11-13t but wasnt sure about buying them... driving wise i would be driving in all weather situations and i would be driving on grass or pavement

CptKlink

That i'm not entirely sure but for me I'm running a ECX 2wd Ruckus with a castle Sidewinder SCT 3800KV ESC/Motor combo. I emailed Castle directly and asked about the range of Pinions that I could use that would be safe with the stock 87t Spur gear. They told me any Pinion ranging from 17t to 22t should be fine. But they also said alot of it also depends on how you drive, where your drive, and how long your normal outings of driving it is. So for you since your spur is smaller I think your choice of 14t to 19t is pretty good. And from what I read with most people with the same truck running the stock tooth count Spur normally start with a 15t Pinion and tweak from there.

The best way to tweak what pinion and spur to use is you deffently need to get yourself a infrared temp gun/gauge of some sort. And after everytime you change the gearing put in a fresh charged battery and run the truck pretty hard almost harder then your normally would. Then after a few mins get a temp reading from your motor and ESC. As long as you keep the temps of the motor below 160 degrees and the ESC I think it was below 130 Degrees you will be fine. And also for me personally the reason why I would say run the truck for a few mins a little harder then you normally would is cuz that will better emulate running a full pack or for thoes days you run more then one pack through the truck in one outing. And also if its a colder day it will also kinda compensate for if your running on hotter days. Thats How i test my gearing changes and to get temp readings each person i'm pretty sure will use a different method of testing compaired to another person.

skygreen67

I have 2 temp guns already (i use to breed reptiles and for me they were pretty much a must) ill try that to check things out but i basically just drive around my property and i from what i understand from reading everyones posts say if the stock pinion for the epx (brushed) was 17t then going brushless i should typically need one with fewer teeth? If so would only having pinion start at 14t be enough? Especially if im crazy enough to use the higher settings on my truck? ill definitely be checking the temps tho

collector1231

My Feedback: (1)

You don't need to regear with every change you do to your truck. Just do the "Do I Have The Right Gearing?" test. Its really easy and I made it myself.

1. Turn on transmitter and vehicle.
2. Put a timer on for 5 minutes.
3. Do full speed runs, up and down your street.
4. Pull off truck to side ASAP once 5 minutes is up.
5. If the temps are 120>, then keep going for another 5 minutes. After these 5, if you can, test the LiPO voltage and divide it by the amount of cells. If each cell is higher than 3.8, keep going. Do this for all 5 minute marks.
6. If the temps are 140>, then keep going for 5 minutes.
7. If the temps are 150>, then it is geared well. If it is higher, then go down on teeth. If it is lower, you can gear up if you wish to.

skygreen67

Ok this might sound stupid but i just put on a new differential housing on the rear of the truck and now the front and rear tires are spining in opposite directions?

Never mind... on one housing the differential could only sit one way but on the other it could sit on either side and it was on the wrong side... or would that make a difference?

DieHarder

Robinson racing makes quite a few types of pinions. There's aluminum, steel (regular), and hardened steel. This is a hardened steel one: http://www.ebay.com/itm/Traxxas-Rust...item3f3e977ed2 The one linked will not work for skygreen because it is not Mod 0.6. I've never seen a Mod 0.6 48P that was hardened, at least from Robinson Racing. Robinson Racing makes mostly hardened 32P gears because if someone has so much power that they chose to get a steel spur, then 48P is not going to be sufficient for that much power. Skygreen would be so much better off with a plastic 32P spur and 32P pinion (hardened or not). I switched to 32P from 48P on my Evader. I was stripping spurs on 2S. After the conversion to 32P, I can't strip a spur on 3S even if I try, and that's using a plastic spur! Metal on plastic is so much quieter than metal on metal. There's a reason vehicles that run 4S-6S use 32P. You can't go wrong with parts more HD than you need.

skygreen67

Do you know where i can find a 32p spur dieharder

DieHarder

Unfortunately, no. They don't make one. I thought your Redcat had a slipper clutch which would allow you to use a spur with the standard hole pattern. Since there is no slipper clutch and a pin slot has to be molded into the back of the spur, a standard 32P spur can't be used. So I guess you're stuck with the steelie. I see I was wrong.... I guess just get the regular pinion, not the aluminum, and see what happens. You don't really have any other options.

skygreen67

I have found some mod 0.6 hd steel pinions but theyre about 15$ a piece and arent made anymore so i need to know exactly how many teeth im going to be using most often so for the time being ive gone back to plastic and once the aluminum ones get here ill experiment a bit till i know what works best... im a little disappointed though... ive gone through all this so i wouldnt have to buy a smaller battery and now i might not have any choice... with the 3s if im extremely careful i could smoke my neighbor in half a heartbeat but its way too powerful... im using what i believe are the lowest settings for punch and timing but it goes so fast its completely uncontrollable... other than drop some teeth off the pinion thats my only option right?

EXT2Rob

My Feedback: (1)

I'm afraid that's about right dude. If they don't make 'em, you're kinda stuck. Going with fewer pinion teeth is the only way to make 3S less "mental". Or, getting a lower-KV motor.

CptKlink

It makes me think if there would be a way to convert it to be able to use a slipper clutch system. If that would be possible it would open up your options of useing almost any spur and pinion you want to. If it would be possible at all it would take some modifying of parts to get it to work.

zackS30

That sucks man, sorry ur having such a hard time. :/

DieHarder

I'm sure it's probably been stated, but what does you neighbor have and what is running battery wise? I think we might be able to determine if you can kick his *** on 2S.

skygreen67

I know his is a fully stock volcano epx pro running a 2s but im not sure what the kv is for the motor

CptKlink

Well if his is fully stock according to red cats website he would be running a 3300KV motor with a 64t spur and most likely the 17t pinion.

skygreen67

That sounds about right

skygreen67

Which do you guys think would work best getting a 2s and go up one or 2 teeth or keep the 3s and drop teeth?

zackS30

I think u could beat him on 2s. 3s would be putting him in his place, maybe hell ask to buy it back then u can bend him over like he did u.

DieHarder

I like Zach's thinking! lol

In what way are you hoping to beat him? Speed runs? Acceleration? At the track? If you run 2S, you either need a big, bad battery matched with a serious esc/motor combo or gear it in a way to beat him. Are you guys just gonna bash around the neighborhood?

Is the truck fixed and running right now? All this back and forth posting has me confused to whether or not it goes.

CptKlink

Ya I would stop worrying about everything and just concentrate on getting the thing reliably running/going then worry about all the little things after its working. Why worry about beating your neighbor when the truck doesn't even work properly yet.

zackS30

I'm under the impression with the new motor/ESC he's good now. Just having trouble with stripping gears.

skygreen67

Yup shes running alright... just a tad out of control... the new motor and esc worked better than i could imagine but while running the 3s even on the lowest settings its extremely hard to control... i know its far from geared right i have to go to a smaller pinion and i waiting for them to arrive in the mail... ive stripped all the brass ones i had except for one... right now im not really worried about beating him i just want to be able to control it and have some fun... im going to try taking a video of it running with the new motor and esc but i have to find a new transmitter and receiver... the antenna on my receiver fell off the other day...

DieHarder

I've soldered antenna wires back on. It's possible but takes a little patience and being careful not to fry the circuit board. If you have a FlySky or the like, it's not even worth your time soldering, just go buy a new receiver for $8. I forgot what radio you have.

DieHarder

What gears are you running as of now that makes it really hard to control?

skygreen67

Id fry the circuit board for sure im just using what came with it (rcr-2c) and ur right its not worth it after xmas i might buy a whole new one anyways... gearing right now is 64t spur and 17t pinion... i know i need a smaller pinion but i am going extremely easy on it so it doesnt get hot