Wildcat1971

iTrader: (84)

Yeah, that esc should be able to handle that. But you will need to gear down

fritzl65

iTrader: (7)

the tires are 4"
please tell me what gear down means
the trycknhas a 96 tooth spur gear

Wildcat1971

iTrader: (84)

well, a smaller pinion, way smaller than you used with the 13.5. honestly you going to need to try several different pinions. I would start with the smallest that you can put on the motoer and still get the proper mesh.

fritzl65

iTrader: (7)

Calculation for 5.5t motor

so I entered the values into the Novak starting sheet...

11 FDR / 2.6 tranny = 4.23 (spur/pinion ratio)

and I get

FDR = 11
Trans ratio = 2.6 (from manual)

Spur/Pinion Ratio = 4.23

Existing Spur = 96 (Stock)


96 spur / 4.23 = 22.69 pinion

Please double check as this doesnt jive with what people are suggesting...

Sorry to be a pain, but I am trying to do my homework.

Thank you for reading


Fritz

oeoeo327

iTrader: (75)

Does this calculator take tire diameter into account? Based on that final drive, it might be a little off. I'd start using an 18 tooth pinion, setting the ESC to 0 timing, and setting the motor to 0 degrees timing. Run the truck for 2 minutes, and measure the temperature on the motor. If it's any warmer than 110 degrees, you might want to consider using a smaller pinion.

Wildcat1971

iTrader: (84)

check your temps often and try the 18 like he says.

fritzl65

iTrader: (7)

Thanks Guys
I will get an 18...
I am just curious.
and my math OCD kicking in...
does the math not work for belt driven 4wd trucks?


And does anyone have a source for pinion collections?
i see them available individually at 5-6 bucks per...
would cost much to get the range...


thanks again


Fritz

Wildcat1971

iTrader: (84)

the math is only part of it. What your doing with it matters also. Like bashing and running it for 30 minutes. Start conservative and work your way up in gearing. And check temps often. 4x4 temps need to be monitored more so than 2wd because of the strain on the motor and packs.

Grasschopper

iTrader: (54)

You don't really need a huge range of pinions...trust me I made that mistake. I have 6-8 right now never used that I'm going to sell...but of course they are of no use to you because mine are in the 26t-31t range. Too big for my mod cars and too small for my stock. Why did I buy these again?

So anyway the issue with 4wd (belt driven doesn't really matter) and MT is that 4wd and the larger heavier wheel/tire combo will result in more power needed by the motor. Going to lower and lower turns will give more speed but not the power that's why several have suggested 4 pole motors...for the power.

Is this the motor you're talking about now? http://www.speedpassion.net/us/produ...138803V2&c=MTR

Wildcat1971

iTrader: (84)

That motor has a 5mm shaft. I am pretty sure no one makes pinion in 5mm shaft. Being that he had a 13.5 before, i would assume its just a 540 5.5 mod motor.

Grasschopper

iTrader: (54)

Well right that's why I'm questioning it. I went to the Speed Passion site and that's the only 5.5R series 2 motor listed...and it's a 1/8 motor. They sure don't give a ton of detail on their site but I'd assume that's a 4 pole motor and if it is the one he's looking at I'm not so sure it would work with the ESC he has...or not for long anyway.

Wildcat1971

iTrader: (84)

I was thinking it was this one.

http://www.speedpassion.net/en/produ...=13855V3&c=MTR

Grasschopper

iTrader: (54)

That's what I thought initially too but he did say competition 2.0 which doesn't match either motor.

fritzl65

iTrader: (7)

The motor which I smoked is the 13.5t

Ill post a picture of it..

I have a 5.5 that is being saved until I feel more confident that I wont smoke it as well

Still trying to figure out how/what difference is of four pole motor.

So far I think I know this much

lower turns more speed less power
higher turns more power less speed

Not sure how poles figure into this.


Learning about gearing from the other post I made about my sons' XX and XXX-ts

Thanks for educating this newb

fritzl65

iTrader: (7)

Hey all and happy new year
Sorry for the delay but life happened

Here is the picture of the motor i smoked


It oscillates when i pull trigger. And leads get exceedingly hot after a few seconds

I have bought a four pole 4000kv motor from hobbywing and installed that. Is it a characteristic of four pole motors to not "coast" when trigger is in neutral?
If not then i may need to reset the esc.
Please let me know about the coasting in neutral
Fritz