Help - axial yeti rarely on its wheels!

Help - axial yeti rarely on its wheels!

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Discussion

drgoatboy

Original Poster:

1,713 posts

214 months

Friday 19th July 2019
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So I built an axial yeti kit. Running with 13.5t brush less and 3s lipo. It's fast but not crazy but I can't get the bloomin thing to corner without it tipping over. Yes it will at low speed but with any sort of power it rolls over.
This is driving on wettish grass. I have put slightly heavier oil in the front shocks but it's still terrible.
I will confess to being unskilled in the way of fast RC when it comes to driving it but having been using slower RC on and off for years so not a compete noob. I know full power turns are off the cards but surely it must turn faster than it currently does

What I don't know is what to try and adjust to make the thing handle better? Can anyone point me in the right direction of what to try? It has loads of adjustment but I don't really know what to look at. Would be good to try adjusting the geometry or preload or something before I spend more cash on heavier springs or something. Any good guides out there to read?

Thanks in advance everyone. smile

henryk001

590 posts

165 months

Friday 19th July 2019
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Hi. I’m no expert on RC stuff, but I used to hillclimb and sprint a real car . I’m suggesting your shocks are set and running to hard. Therefore any change in direction on a bump or undulation would cause a adverse reaction.Try using a thinner oil in them to soften the shock or if you can adjust the pressure down?. Proof if your going in the right direction is to add a weight to the car. Try it and if it handles better then you need to soften the ride more or fit weaker springs. Camber adjusting to a more positive angle would also help. Hope I’ve given you some ideas to try.

The_Jackal

4,854 posts

204 months

Friday 19th July 2019
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It's nothing to do with shock settings.
RCs roll on grass when turning, they just do because there is too much grip and no slippage. If you want to blast it, it just means straight line runs.
Your truck is more suited to loose surfaces like dirt and gravel.
This is from experience with things from buggies to monster trucks.
Nice truck though.

henryk001

590 posts

165 months

Friday 19th July 2019
quotequote all
As I said I’m no expert, but I know from my own experience together with grasstrack racing. Suspension has to be set to a very soft setting. Just trying to help out. Cheers

The_Jackal

4,854 posts

204 months

Friday 19th July 2019
quotequote all
Grasstrack is real world though with real cars, and I bet they slide.
Turning on grass is always an issue for RC cars, the outer sticky rubber wheels just grip too much and you get grip roll.
Yeah tune your suspension for bumps, but it is the high lateral grip that causes the roll along with high centre of gravity.
I used to race 1/8 Nitro buggies, so I know exactly how shock setups change handling.

drgoatboy

Original Poster:

1,713 posts

214 months

Friday 19th July 2019
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Thanks guys. I hadn't thought about the the grass being a tough surface. Maybe it's not so bad then!!
I just know grass is so slippy from experience of getting stuck on it in the most unexpected circumstances!
I need to find me some gravel!

sausage76

360 posts

130 months

Friday 2nd August 2019
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I ran a yeti on 2s and if going flat out that would flip on any surface.

Its just all about the throttle control and getting used to getting it to corner. I always found a little slow and then a blast of throttle would get the back end round

Top Banana

436 posts

219 months

Sunday 4th August 2019
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As a yeti owner I can point you in one direction...

Ditch the stock foam tire inserts and get some firmer ones (mine came from the US, can't remember the make but they were about £35). Part of the issue with the yeti is the tyres roll under hard corners and then dig-in and cause the thing to flip..

The other thing that made a difference was fitting a front ARB

Even with these mods the yeti will never be a fast corner machine, much better to use the slow in/fast out approach (also means you can get it to pop some awesome power wheelies on the throttle..

drgoatboy

Original Poster:

1,713 posts

214 months

Sunday 4th August 2019
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Thanks everyone. I have ordered the former springs as they were pretty cheap so I will try that. Foam inserts next!!

HertsBiker

6,371 posts

278 months

Sunday 29th December 2019
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If you're still having problems, I cured my FTX Outlaw's cornering problems with a super stiff rear ARB. The Yeti is very similar. Rigid rear axles roll in the negative direction as well as the positive. You could also reduce the total travel of the rear shocks to remove a lot of sag.