Rear wheels slip problem, help!

[MonsterDDT]

Hi,

I finally have my first run on my CR-01. After weeks and weeks of youtube brain wash, I'm kind of disappointed on it's performance I got. It runs no better than my pretty much stock TXT-1. It seems the folks in those youtube vids were running a totally different rigs.

Anyway, I think the major problem is that the rear wheel slipped a lot. Whenever I tried to climb up to a rock, the rear wheels didn't provide enough grip to push it up. If it's not most people got, I could think of the followings possibility:
- The surface I tired was slippery than normal. (some sand on the rock, mixed with some fallen leaves, etc) But isn't that what a "normal" rocky place should be??
- The stock tires don't provid enough grip. Well what do you suggest?
- The 1lb on front, 1/2lb on rear extra weight I added made it too heavy?


Please advice.

Thanks!!

DDT

[Joat]

Mines bone stock ,just no cantilevers, mine goes where ever I want
Why so much weight in the wheels?
Also you can try swap the springs from frt to rear, stock tires seem ok, not in the same league as my panther cougars, but still very decent.

[EL BARTO 1979]

Stock tires are not worth much on sand/mud but on rock...

ofcourse you locked the diff's right?

[MonsterDDT]

Yea, the dif are locked. Not sure if it's a common terrain, dry leaves, some sand on rock, early morning moisture......

Will make some configuration changes and try again next weekend.

DDT

Originally Posted by EL BARTO 1979

Stock tires are not worth much on sand/mud but on rock...

ofcourse you locked the diff's right?

[william g]

did you weight tires, or the chassis? Tires = good chassis = poor

[metalry101]

The stock tires aren't that great..they're better than stock Axial tires, but nowhere near a Pro-Line or Losi tire. Also, if you're going for performance you definitely want to run the springs reverse from the stock setting, like someone suggested earlier.

The CR-01 is heavy enough already, so I wouldn't really bother throwing too much weight at the thing...I have 3 ounces in each of my fronts and none in the rear and I'm happy enough. I'm only scaling with mine, not comp running...but if you're running the stock body, chassis, etc on a CR-01, then you're only scale running too. The CR-01 can be turned into a capable comp rig if you want to, but that's not what it's set up for out of the box.

[MonsterDDT]

You guys are right, may be I will take out the weight and only keep 1/2 lb in the front wheels.

I also think the the 14oz 4500mah NimH is kind of heavy.
Anybody tried using just 1200mah 7.2V AA size batteries? Since they are much lighter and the power capacity is not an issue on a crawler......

DT

[metalry101]

I'd stick with your 4500 mah battery. The truck is designed for that weight on the front end. It's up pretty high, but at least it's on the front end. AA size batteries will kill your power too.

[MonsterDDT]

Not sure if it really matters since my 55T motor is drawing low current.

Originally Posted by metalry101

I'd stick with your 4500 mah battery. The truck is designed for that weight on the front end. It's up pretty high, but at least it's on the front end. AA size batteries will kill your power too.

[dezmoon]

run time on the lil packs arent as good,,the weight of the big battrey is good like stated before,,,,i think its the terrain your on,,i have a few sets of the stock tires,,and use them on other rigs,,they work awesome,,,how ever i dont use them on my fjs,,,i have mud slingers on one and m2 hammers on the other,,and have great success with both rigs for what they are used for,,

[Gozer]

The weight thing is getting me I need to add. But can't seem to find the weight locally. Autozone, Advance Auto, and Checker don't carry the stick on mag weights. Plus I used the last to 6 oz. sections in my AX10. I'll have to call some Tire shops. Later Goz.

[1rcmonster]

I run 5.25 oz of weight in each front wheel and no weight in the back. Re-located the shocks and left the sway bars in place. I put the front springs out back and the back in front. Shocks are Associated 4" with 50wt oil.

Works extremely well on high angle climbs but not so good side hilling...Could be all the crap in my roofrack tho.....

[MonsterDDT]

Hi Folks,

I finally tried the new setup last weekend. It definitely helps by reducing the weight. However the rear wheel still slip quite often. Just when I started to puzzle whatelse was wrong, I came across a few folks in the park playing their AX-10. They were so kind to let me tried out their Losi tires with aluminium wheels on my CR-01.

Once I put them on, it significantly improved the rear wheels slip problem. I was able to climb one of the two slope that their AX-10 crawled like a spider. The other one the CR failed to climb because of the CG. it started to back flip. They suggested me to put back a little more weight in the front (6 oz each) and try to lower the battery to help the CG.

Any suggestion on how to deal with the battery CG?

thx

DDT

[metalry101]

Moving the battery lower like they suggested will certainly help performance, but to do it you'll need to run a small battery. Personally, I'd just add a shade more weight to the front end and call it a day. If you're really wanting to run the CR-01 with competition AX-10's, it's going to need a lot of work. It's just not designed to run with them out of the box.

However, if you do decide you want to be able to hang with them, the easiest way to get the battery lower to is mount it on the front upper links. You'll need a small battery, and even then it might still hit the framerails and/or stock battery tray during articulation.

[vipxj]

Put the trans and diffs in a comp frame or tuber frame, and then find somewhere for the battery,then blow the ax10s off the rocks!.
A comp 2:2 cr01.
Lowering a normal battery on a cr aint easy .

[william g]

you could run a lipo pack, much lighter than a nicad

[StarOne]

I was looking around and saw a battery plate for the CR01.

http://www.junfac.com/shop/index.php...roducts_id=232

If you ran some Lipo bats on the front axel may help with the CG

RM


"Do not take life too seriously.....You will not get out alive!"

[MonsterDDT]

Wow, that's a very interesting option I've never thought of.
(But it will for sure hurt the "scale" side a bit )

Thanks for the tips!

Originally Posted by StarOne

I was looking around and saw a battery plate for the CR01.

http://www.junfac.com/shop/index.php...roducts_id=232

If you ran some Lipo bats on the front axel my help with the CG

RM


"Do not take life too seriously.....You will not get out alive!"

[MonsterDDT]

I have put on a new set of Losi tires and stunned by the difference they made!
Now, it crawls!
It can crawl many slopes that it couldn't crawl before.

I strongly recommend this mod as the stock tires just suck.

The next mod I will do is go with lipo batteries. It will reduce the top heavy weight from 14oz to 4oz. It should further reduce the flip over rate both up hill and side hill.

Stay tuned!

DDT

[vipxj]

Have you tried a stick pack on the front axle,not a lot of room.

Originally Posted by StarOne

I was looking around and saw a battery plate for the CR01.

http://www.junfac.com/shop/index.php...roducts_id=232

If you ran some Lipo bats on the front axel may help with the CG

RM


"Do not take life too seriously.....You will not get out alive!"