Clod stall help pleez!!!

[jado6006]

Alright fellow crawlers, i need somebody smarter than myself to help wiuth this one! Have a berg with twin fxr's, dual tekin 45s(both bought new about a mo. ago), novak dig, all run by a dx3e. Problem is, when the front hits a rock face, it basically stops, while the rear is spinning. If i goose the throttle, the front breaks free, & does what its sposed to, but then, it gets all squirrelly, & i lose my line altogether as the rig hops around. So, after getting some advice, i turned the rear esc down to 75%. Holding the rig in the air, it looked as if i solved the problem. But that goes away the moment that front axle buts up against a rock face! So, i'm asking-what next? I've double, & triple checked the wiring. No breaks anywhere. I dont wanna buy a faster (35) motr for up front. Doesn't seem like the right way to go. Pinion-both motors have 18t on them. I'm getting conflicting info. I thought a tooth or 2 higher would do the trick. But then another buddy says the opposite-a tooth or 2 lower will make the motor spin faster, getting rid of the stall. So, whose right? Or, would you do something else entirely? Thanks folks.

[frdtrkguy]

A tooth higher on the front is what you want.

Search around. I doubt that there is another topic that has been covered more..

[crash]

Does nobody ever try to educate themselves?

[Draggermirage]

Motor timing.

[crawl-o-matic]

imo, 18 tooth pinions are way too much...you're messing with your torque profile.

...you went down to 75% in the rear, so you don't need to mess with different sized pinions

Also, what bec are you running??

(Just for the heck of it, try this: Make sure your bec is up to snuff, get some 35T motors with 12T pinions on a 3S lipo, and kick the rear down by 10%)

[Charlie-III]

Originally Posted by frdtrkguy

A tooth higher on the front is what you want.

Search around. I doubt that there is another topic that has been covered more..

"Where is the for sale section" probably ranks higher......

Originally Posted by crash

Does nobody ever try to educate themselves?

I tried, but now my feeble brain hurts....

Originally Posted by Draggermirage

Motor timing.

That could help.....

Originally Posted by crawl-o-matic

IMHO, 18 tooth pinions are way too much...you're messing with your torque profile.

...you went down to 75% in the rear, so you don't need to mess with different sized pinions

Also, what bec are you running??


(Just for the heck of it, try this: Make sure your bec is up to snuff, get some 35T motors with 12T pinions on a 3S lipo, and kick the rear down by 10%)

The 18T on 45T motors is actually likely not too bad......way too fast for 35T's though.


OP, if your radio will support it, I would suggest ditching the dig unit and get a WantAmix from LosiKid. I did that with my Futaba 3PM-x with dual CC ESC's. Much better than the servo dig I had before.
One advantage is that you can not only do dig, but can do proportional as well. This means you can have similar motors & same tooth count pinions and over/under drive either end.
Not quite as good as a decent radio & dual ESC's, but pretty close.

[roksloski]

Its the 18 tooth pinion.......................way too much...........
The Tekin motors dont help any either.......

I once tried 15T pinion with 55t motors and the stall was soooo bad...
they didnt stay in there longer than about a day......

14t pinion is the most i would ever go........
Now i run 12t rear / 13 t front..............................



OH yea... The Novak Dig Is perfectly fine...............

[jado6006]

I searched it before i posted. Got the same conflicting info from the posts. Lots of redcat stuff, & dudes with different components than myself. Feel free to use those keystrokes positively, instead of btching. Have a good one-crash.

[jado6006]

Originally Posted by roksloski

Its the 18 tooth pinion.......................way too much...........
The Tekin motors dont help any either.......

I once tried 15T pinion with 55t motors and the stall was soooo bad...
they didnt stay in there longer than about a day......

14t pinion is the most i would ever go........
Now i run 12t rear / 13 t front..............................



OH yea... The Novak Dig Is perfectly fine...............

Thanks for the words on the novak. Was actually concerned about that. Also, out of all the moa guru's, nobody questioned the pinion #s i'm running. Your post was all i need to see. Gonna switch to 15 up front, & 13 in the rear.(i have those,lol) Thanks again.

[roksloski]

Originally Posted by jado6006

Thanks for the words on the novak. Was actually concerned about that. Also, out of all the moa guru's, nobody questioned the pinion #s i'm running. Your post was all i need to see. Gonna switch to 15 up front, & 13 in the rear.(i have those,lol) Thanks again.

Just make sure they are Metric pitch pinions...........

[roksloski]

you can also set the FXR's different from each other...
An agressive throttle curve in front......or what ever works for you.....

[crawl-o-matic]

You have dual esc's, use the same pinion tooth count front and rear (12 or 13T max) and adjust your rear esc to underdrive at whatever % you want...otherwise, you're defeating the purpose of having a dual system in the first place.

Do yourself a favor and get a WantAmix or a 4PL radio...you have 2 fxr's, you might as well use them!

Also what BEC are you using...it's important!