Shock oil
 

What weight should I run in the Yeti?
I'm running PL powerstokes.

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Re: Shock oil
 

I run 500cst in the rear and 700cst front in my Icons. Could be a good starting point maybe.
I never got the proline xl rear shox working on my little monster with the incl. springs. Way too soft, so i stay with the icons.

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Re: Shock oil
 

What comes in the RTR?

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Re: Shock oil
 

Driving style and/or intended use of the car determines the rate of the springs. And the shock oil should be adjusted to the springs.

This is what I run and what I use the Yeti for. As example. But for for instance bouncing rc cars around requires higher spring rates and thicker oil. But also modifications to the frame to add strength.

http://www.rccrawler.com/forum/axial...uspension.html Post#2

So more info needed when you want a complete answer.

Yvo

Re: Shock oil
 

I bought the kit Yeti Score, and a RTR chassis, and as such am using the kit shocks. I also have a limited selection of shock oils SO -

I use AE oils exclusively cause they are made my Lucas Oils.

My Scale kit
front-
50% 25wt
50% 50wt

rear -
50% 30wt
50% 60wt

The rear is a tad hard - with the stock shocks seems 40-45wt would be perfect - front is mint, if anything a little soft yet..

My race RTR-
front-
40wt

rear-
50-60wt

Re: Shock oil
 

Well, played with it some more.
Since more info is better. It's a RR Yeti. Maybe a little heavier than stock. Have some aluminum upgrades.
Powerstroke shocks from Pro-Line. Went with pro-spec purple springs and secondary up front and switched the rear springs to blue primary and green secondary. I refilled the shocks with Associated 30wt shock oil all around. Truck seems happy. Softer ride than 55wt and more articulation. Front springs up much easier than before.
Also should mention I have the rear UC Fab sway bar set to it's softest setting as well.

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Re: Shock oil
 

When the truck looks happy, my guess is you are too with this setup. ;-)

Springs are there to keep the car/wheels at a certain position relative to the car and to remain as much contact with the ground as possible. While dealing with holes and bumps. So they depend on driving style and terrain.
Springs are the first step in setting up suspension.

(Shock oil doesn't do the shock absorbing. Springs do. Bear in mind in that respect that compression and rebound are the same with oil. So the thicker the oil, the slower the compression and the slower he rebound - bouncy car and less control since wheels off ground).

Oil is there to keep the springs "calm" and should never be to thick. Oil is there to prevent oscillation of the springs. But must be thin enough to let the springs move freely.

That said, the 30 you use looks fine. Even perhaps 20 in the rear shocks.

Yvo

Re: Shock oil
 

Yes, springs were ok but the change in the rear helped. The oil was the biggest change as the dampening did seem 'slow.
It still donkey kicks coming off larger bumps or jumps at speed. But from running a couple packs through the truck yesterday it is a much more stable vehicle.

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Re: Shock oil
 

"thumbsup"

Re: Shock oil
 

30 in front and 10 in rear for the kit. I’m guessing rtr is the same.


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Re: Shock oil
 

Well yeah oil alone doesn’t do anything, but otherwise you couldn’t say any more wrong than that.
Take the springs off and put in heavy oil and do a drop test. The car will slowly get down to the ground while shocks considerably slow down the downward speed of the car. shock absorbers turn the downward movement kinetic energy to heat. Drive hard on an uneven bumpy surface for a while and your shocks are all warm or even hot.

The whole shock and its function is always a sum/result of cooperation of the spring and the shock absorber, and it is easy to overshoot either way.

Re: Shock oil
 

Again, I don't exactly know what Axial was thinking when they decided 10wt shock oil was okay for normal everyday "rock racing". I built the kit with what was included. It didn't take long (3 minutes or so) to notice the Yeti was severely under dampened. Donkey kickin' the rear end on every bump/jump makes for wacky driving no matter how much reserved throttle you have to try and correct it in flight. I spent many weeks with different spring/shock oil/pistons setups trying to cure the rear end kick. I went back to stock pistons and I slowly increased thickness of rear shock oil every couple of runs. I believe I finally settled on 45wt oil for the front, and 35wt for the rear shocks (Associated shock oil). I'm not an extreme basher, but the rear end now has a shot to clear a jump without bottoming out first.

I run my Yeti almost like a SC truck at backyard rough off-road track. 2S LiPo packs only. Top speed 22mph.

Front:
Stock Shock Pistons
3.27 lbs/in 70mm Yellow Springs
45wt Shock Oil
Ride Height-Arms Level
30k Diff Fluid

Rear:
Stock Shock Pistons
1.71 lbs/in 90mm White Springs
35wt Shock Oil
Ride Height-Lower Link Level with Chassis

And like the others...DEUCE'S WILD 2.2 STANDARD FOAMS