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Suspension/Steering Settings.

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Alan_UK

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Hi folks, my Savage 25 seems to tip over onto its roof very easily. Just a little too much power or brakes into/out of a bend and it rolls. Is this normal? Are there any suspension mods I can make? My Savage is totally standard apart from a pipe and air filter.
I have searched on the web for any set up data but found nothing. Any ideas? This is my first nitro powered car so maybe they all do this??
Thanks,

Al.
 
Alan there are a few different things you can do here. Almost sounds af there isn't enough spring there in your shock. You can remedy this by getting new springs but a cheeper mod would be to put some higher weight shock oil in the shocks. I am running Assocaited 80wt in mine with the stock springs. You could also make a differential modification here is a link
http://www.savage-central.com/article28.html
That modification would also assist you greatly in cornering as it will transfer power to another wheel. There are ball bearing steering upgrades. One last thing too is you might try the GPM anti roll bars. I would honestly suggest starting with some shock oil. It is cheep and can improve things tremendously. I think they are usually about $4.00usd per bottle
 
Thanks for the tips, I'll definately do the diff modifications. As for the oil in the dampers, is it special RC stuff or can I use some of the oil I have in my garage for my Rockshox on my mountain bike? I have a few different viscosities of this stuff lying about.

Thanks again :thumbup:

Al
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Something tells me someone did not read the original post all the way. Why? Heavier shock oil will only make the suspension more stiff and lead to more roll overs. The sway bars are a great idea, but to beat a roll in the turn, you need to widen your stance, lower your center of gravity, change your suspension or a little of each.

To widen your stance, you could go with a wider tire like the ProLine 40 series or the IMEX JumboMaxx series.

To lower your center of gravity, you can decrease your shock silicone.oil wieght or zip strip your a-arm in such a way as to create a low rider.

To adjust your suspension, you could use the sway bars, softer springs, and a lighter shock silicone/oil.

All of the above will accomplish the same, make the truck more stable in the turns. Of the three methods, I prefer the widening of the truck's stance. I run IMEX JumboMaxx tires and the width is just about the same as the length if not wider than. This kind of side-to-side stability definitely prevents roll overs. Endovers is another animal all together, and is still a problem I do not have...but that is solved by another version of set-ups.
 
Meaning no dis respect here at all. I just know one thing, in the real world if my ride has weak springs and not enough shock to keep up with travel it handles poorly. You as well have pointed out some great suggestions. The diff mod would be a good one to do also since if the truck starts to roll the tire that raises the other tire will get power. That is all I was trying to say. This is what I would do to my own rig to make it handle better.
 
In the real world and the RC world shocks work the same. Oil/Silcone is the dampener. This governs how quickly the shock travels. The spring governs the rebound. Strong springs and weak oil means a bouncy ride. Strong springs and strong oil means a stiff ride. Weak springs and strong oil means a stiff ride. Weak springs and weak oil means a mushy ride as the shocks recoil rapidly and handle bumps easily.

Your mention of the diff mod is a great start, but that does not stop the roll. It just transfers power to the wheels that are still on the ground. That does not necessarily mean it will stop rolling. It just means that you will have more power to the wheels on the ground.

As I said, the best way to counter side-to-side rolling is to increase the width of your footprint, lower your center of gravity, adjust your suspensio accordinglym or a combo of each. Beyond that...power transfer might help in a gyroscopic fashion, but usually it ony makes the issue worse. Of course, you could try easing the brakes on as you start to roll. That might help.
 

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