Help with a problem in new build

[hani1400]

When climbing steep angles the front right wheel lifts up off the surface and causes instability.

The only thing that I didn't do by the book is the stabilizer rods because I noticed it limits the flex of the truck considerably.

Does anyone have any idea what's causing this?

[cementhead]

Not to be dum but did you add wheel weight to the front . 7.5 o/z each side.

[hani1400]

Originally Posted by cementhead

Not to be dum but did you add wheel weight to the front . 7.5 o/z each side.

No..
Was i meant to?
Any ideas what to use? and where you guys tuck the wights?

[speedcrawler]

ya wheel weights help all rigs alot because they keep it to the ground. you can use bbs or just lead weights anything from fishing lead to what they use at a tire shop. usually you want to even both tires so have a scale and take the tires off the rim and just stick the weights with hot glue or whatever you want to the rim and the put tire back on. Make sure you evenly spread the weights are the whole truck will vibrate.
Hope this helps

[Unimog]

This will enhance the climbing abilities of a Cr-01, IMHO:
Short springs, soft up front, medium in the rear in the right, a hard one on the rear left.
Lots of weight in the wheels, much more than with, say, an AX10. My set of wheels on the Cr-01 weight 2lbs.
Flat Iron M3.
http://www.youtube.com/watch?v=L7f152sklFo

[AkFordfan]

Mine did the same thing even with weights, it was tha lack of the rear sway bar.

[krapulax]

Originally Posted by hani1400

When climbing steep angles the front right wheel lifts up off the surface and causes instability.

The only thing that I didn't do by the book is the stabilizer rods because I noticed it limits the flex of the truck considerably.

Does anyone have any idea what's causing this?

Yes, it's the stabilizer rods you didn't use. The car has horrible torque twist (which I take it you just found out) and Tamiya has used the stabilizers to tame it somewhat. it works to some extent but if you get a more serious motor, torque twist is going to come back.


Most people do indeed use a lot of weight in the wheels but that is not primarily a solution to torque twist. There are other suspension tweaks that work (to some extent) but torque twist will always be present in a shaft drive transmission.

[tklatti]

You can fab up a 4 link. it will also help.

[860Crawler]

There's no need for rediculous articulation in this rig. They work great with the stabilizer bars in. A firm or medium one in the rear along with maybe a hard spring in the left rear might work as was said.

[Unimog]

Myself, I dont like too much articulation in my cars. And the top-heavy CR-01 needs all the stability it can get. I complemented the softer springs up front with a harder stabilzer, the medium/hard rear springs got a soft one.

[hani1400]

Which springs you guys use?
all i see is the stock ones on ebay.

[860Crawler]

Thats all there is really.
They come in standard springs (54029) with soft, med., hard
barrel springs (54084) in soft, med, hard
short barrel spring set (54085) in soft, med., hard.

There is an aftermarket company that makes a spring set but they are the same as Tamiya but unpainted. I can't recall the company.

[hani1400]

I use the hard ones (blue) that came with the kit is there any stiffer than these?

[860Crawler]

I recently switched to the short barrel spring set and they are slightly firmer than the stock set. The wire diameter of the short spring is larger so in turn they are more firm, plus the barrel shape give a more progressive spring rate.

As an example, I used to always hit my left rear tire on the body when using the stock spring set because of the torque twist on certain climbs. Now, even though the body is closer to the tires, I have much less instances of the body contacting the tires, almost never. And that is using yellow medium springs in the back not the hard set.