To those running Proline Powerstroke Rear Slashes...

[Odd-M]

I'm running the softest primary and second softest seco dary (the upper small one) from Prolines spring kit. With some preload my rig will stand with 1/3 static sag, from my point of view near ideal. Which spring will be right for other rigs, I can only guess. But try to get some sag.
For shock oil you can try anything around 30 wt. Iiked mine better with a slightly thinner oil. 25 wt rear and 15 wt front. This is Associated shock oil. Other producers will be different as "wt" is no accurate spec norm.

[Drm31078]

I am seriously failing at these shocks....filled them all and can't seem to get consistent rebound. One of them has zero rebound. WTH!!

Filled them 3/4 of the way.
Cycled the piston
Waited for the air bubbles to go away
Pushed the piston all the way up
Put cap on
Wiped off excess fluid from bleed hole

What did I do wrong?

[Rjohn929]

Not sure. I fill mine a little more then 3/4, put the cap on halfway, push the shaft up lightly until it stops then tighten down the cap to bleed out the excess. Always seemed to work well for me.

[mikemcE]

Angle them at 45*hole up. As you screw down top, push plunger up.if bled right you will get a 1/4to1/5 shaft rebound w/o spring


Hang up and Drive

[maslin]

Fill 3/4, cycle wait cycle wait till the air is all gone. Shaft all the way out, fill to the top. Screw the cap on half way, hold at 45 with the bleed hole up. Compress the shaft all the way in, spin the shock body to fully tighten.

Does it waste some shock oil? Yup. But there's definitely no air left.

[Lanky]

Originally Posted by maslin

Fill 3/4, cycle wait cycle wait till the air is all gone. Shaft all the way out, fill to the top. Screw the cap on half way, hold at 45 with the bleed hole up. Compress the shaft all the way in, spin the shock body to fully tighten.

Does it waste some shock oil? Yup. But there's definitely no air left.

I use the exact same technique when I run the truck lower with more dampening(above 30wt usually with a spare, and more spring rate) on higher speed tracks/ driving. When I am setting it up for more technical layouts, I will only compress the shock shaft about 3/4 of the way(below 30wt less spring, more static height)... try it out see if it works out for you

I typically use TLR fluids, some higher weighted stuff, I have Serpent and Mugen on hand(from asphalt racing)

[Drm31078]

Reading up on shock tuning. Currently have 30wt and stock springs. So apparently 60-40 sag is appropriate. I have 0 sag with no preload. The means I need softer springs to get more sag?

[Lanky]

Originally Posted by Drm31078

Reading up on shock tuning. Currently have 30wt and stock springs. So apparently 60-40 sag is appropriate. I have 0 sag with no preload. The means I need softer springs to get more sag?

If you compress the suspension to full bump and let it rebound, the suspension cycles back to full travel? if that is the case, you would need less spring.

[Drm31078]

Yup. That's what I thought. I guess my rig isn't has heavy as I thought.

[4RunnerKid]

i've been searching for a softer spring option, too... currently running the softest RC4WD King spring and still wish it was softer

[maslin]

I'm running green over blue in the front, yellow over green in the back. Right at 50% sag.

[Drm31078]

Originally Posted by maslin

I'm running green over blue in the front, yellow over green in the back. Right at 50% sag.

This is pretty close to the next spring combo I was going to try...is your upper spring compressed on either? Around how much preload? if you got a photo so I know what I am looking for, that would be great.

[maslin]

Zero preload except for 1/4" or so on the right rear to combat torque twist. Upper springs almost fully compressed in the rear, 75% ish compressed in the front. I have the rear powerstrokes in the rear, front powerstrokes in the front.

Working on pics, iCloud is absolutely terrible.

[Drm31078]

So with the upper springs being compressed, doesn't that mean the upper springs are pretty much ineffective relative to the suspension? Or is that just an inherent issue for getting as much sag as is needed for a rock crawler? I mean these shocks are really designed for racing where you don't want as much sag, correct?

[maslin]

You want 50% ish sag all the time. Half the bumps in the world go down, half go up. You need negative travel just as much (or more) than up travel.

1:1 Trophy truck ride height vs. droop





Here's my pics. Droop, bump and ride height.







Rear shocks





Front shock (no battery, sits a little lower loaded up)

[MD ENFORCER]

I'm running 22.5w associated oil on big bores and stock springs....or I run 103mm gmade diaphragm shocks with 25w associated oil feont and rear. I was running 40 rear but ended up with same front or rear.

I agree little sag helps in crawling. More sag helps in bashing around.

[DenisLM]

I have the same setup as Maslin same springs and "Slash front/rear," the only difference is I run 15wt all 4 and I like a lot. I might get 20wt in the back next time.
Overall the PowerStrokes have a tight piston hole, so it's hard to compare shock oils with other brands/models, you need to use thinner oil.
The droop is also very important, specially if you want to go fast/U4.

[Drm31078]

So Maslins spring setup puts me right at 40% sag. Note I have the slash rears in the front as well. The front feels much stiffer than the rear, I may end up going blue / blue on the front (softest combo). With that said, I have 30 wt all the way around. I will be using this for crawling / trails...not U4/racing. When I drop my rig, I am getting some air on the rebound. Would a lighter oil help with that since maybe my oil is too heavy and thus it's not able to absorb as quickly due to the small holes?

[maslin]

I have 30wt all around as well. Don't worry about the bounce, big floppy tires are hard to overcome. These aren't 1/8 buggies.

For reference... This is with VPR pistons on an 1/8 scale. 1/8 shocks are massive, 150% of our shocks. Ths VPR pistons are like $60, just for the pistons.



Regular traxxas shock on the left, 1/8 rear shock on the right.

[terrible]

Originally Posted by maslin

I have 30wt all around as well. Don't worry about the bounce, big floppy tires are hard to overcome. These aren't 1/8 buggies.

For reference... This is with VPR pistons on an 1/8 scale. 1/8 shocks are massive, 150% of our shocks. Ths VPR pistons are like $60, just for the pistons.

They are 15$ a pair at our shop.?


Are you not using the bladders in the caps?