BIG basher: Clod w/ Kongs (test run: page 4)

[joe]

^
maybe ill have to hit you up on that one, Bill!

what do you think pinion wise; 9 in the front and 8 in the rear?
or just run 9 in both?
oh, and what pitch should i be looking for?

i havent messed with a clod i quite a while!
:willy

 

[william g]

You need both the same
Only way not to is 2 different tire sizes or maybe some special crawler application. Clod box/trans is 32 pitch

Stock clod is a 13t 32 pitch. Just guessing but for kongs I'd think 9, 10 tooth unless racing setup then maybe a 8 if you can find one.

 

[joe]

^
yeah, i had read about changing the rear by one tooth to help with "clod stall".
maybe its a racer thing; i think Brett Crawford had posted the idea somewhere.
i dont think it will be a big issue for me though.

ill probably use 9 or 10 tooth pinions and if i want more speed ill switch from 6 cell packs to 7 cells.
i cant remeber if the old orange evx can handle 16.8 volts...
maybe ill have to put a blue one in.
still no brushless for me; im goin' old school with what i have on hand.
:tmb

 

[emory70]

a lot of the duratrax cliff climber guys run different pinions in each axle.

that reminds me, i need to work on that one too.

 

[joe]

yeah, maybe i read it on a crawler site.
i think Bill is right for my build to just use the same.
if i start getting issue i can always change a pinion later.

 

[william g]

This is my theory...
because kongs are so tall the ''rollout'' or circumference is so much more than a smaller tire that a altered gear ratio would be harder on the driveline and motors.

With kongs 1 tooth difference on the pinion would be like 2 or 3 teeth compared to a smaller tire. The ratio difference would be magnified.

Crawlers can get away with it a bit more, but kongs on a basher will be hard on parts. Imagine the traction you'll get with kongs, and then go run on a high bite surface. If nothing breaks I'd be surprised. That diff gear will be your weak point I think.

All I'm trying to say is lugging a kong equiped 15-20 pound basher to go have some fun I'd be pissed because of a diff failure. When I think of a basher I think of bullit proofing as much as I can so it's a fun rig I don't have to worry about breaking. A competition or race truck I'd expect breakage because I'd be pushing it.

 

[joe]

^
good points.
im planning to use standard gears and a CPE locker in the rear.
so extra stress should probably be avoided.
as for traction, im planning for sand, but itll probably end up in grass too.

i found some long 9 tooth pinions (long to compensate for motor brackets)
do ya think 9t pinions with kongs will give a similar speed to 13s with stock chevrons?

i always get confused with gearing...
smaller pinion/larger spur for more speed?
opposite for more torque?
in my case, smaller pinion to make up for loss of torque due to larger tires, right?
:bang

 

[joe]

new question...
what do you guys think about 6 tooth pinion gears?
i may have some coming in a bundle; should i use 'em or toss 'em aside?

 

[william g]

6 tooth :shk
Man that has got to make some noise at rpm being 32 pitch :willy Well you can try them since you are running Kongs. Worst thing that can happen is it'll be loud and slow. However I bet you throw a 3s lipo in there and it'll really GO :burn

 

[joe]

i dont really care about noise, but i dont want it to be slow.
id atleast like to be faster than stock; preferably quick like my TXTs.
i may have to switch out to standard clod/TXT tires if the kongs are an issue.
ill get it!
:wnk

 

[William]

small pinion = torque and low speeds

larger pinion = high speed low torque

exact opposite for the spur gear, small spur = speed and a large spur = torque


now
tires, same as pinion
small or short tire = torque and low speed
tall tire = higher speed but loss of torque

That's why the taller the tire the smaller the pinion, but there is an extreme point

 

[joe]

little update...
got the axles pretty much together; i need two more bearings for the knuckle.
links are pretty well mocked up and the chassis is assembled.
i got some absolutely beautiful upper link mounts from DEVASTATOR.
they seem to position things perfectly where i should have no issues clearing motors.
im mocking up shocks right now and working on shock mounts; i have a plan!

i know...
ostpic

ill try to get some tonite.
im shocked that this thread went this long with no pics yet!
:willy

 

[william g]

sure, no ics it doesn't exist :tong

Mike's upper link mounts are :drool awesome, great choice.

Just wait till you see my latest top secret project. I just received the chassis and a few of the parts today. It will be able to run over some R/C's and the ones it can't it'll probably run through them. :willy It's idea came from a R/C Driver project vehicle. I won't show a picture or give anymore clues till I at least have a roller.

 

[joe]

ok, pics...

DEVASTATOR's upper link mounts:

tweaked racing trick on tubes:

overall wheelbase about 15":

and a shot with the tires:

im getting some aluminum lower link/shock mounts that should increase the wb a little closer to 16" overall.
still need to get some adjustable motor mounts, some pinions and two bearings to make it a roller.

i think im gonna steal some multiplex 600s from my TXT for this one.
ive got a new evx2 that im gonna throw in it, too.
hopefully ill have it running, or at least rolling this week!?!
:willy

 

[william g]

Joe do you have the axle braces for it? If not hit up the clodbuster junkyard.

 

[joe]

yeah, ive got some new ones here.
ill put 'em on when i pull it apart to install the c hub braces and shock/link mounts.
:tmb

 

[joe]

i installed my missing bearings, have my shocks mounts enroute, and won a few more bits on ebay.
:tmb

i should have a roller this week for sure!?!
:willy

 

[william g]

roller, you have some motors you can put in, I know. :tong

What else do you need?

 

[joe]

im waiting on a few bits and pieces to get here.
otherwise my only hold up is time!?!
:willy

 

[TXT-2.0]

cool build Joe cant wait to see how it turns out ....