Like all 2WD short course trucks, the SC10's rear traction is the biggest issue for most of your setups. If you are racing on-road or on carpet tracks, then traction probably isn't a concern, but for the off-roaders I am guessing you need some help. We have came up with 6 tips to keep your SC10's rear wheels hooked up.
1. Upgrade your rear tires. A pair Goose Bump Tires by JConcepts or Caliber Tires by Pro-Line Racing is an easy way to increase rear traction without giving up any steering. For about $17 you will make a huge improvement.
2. Add Anti-Squat (aka kick-up). - Read the TeamSC10.com Article on Adding Anti-Squat. Anti-squat is the term used to describe the angle of the rear axle to the ground. When you add anti-squat to your rear axles, you are increasing the angle of the rear axle to the ground and this results in increased rear traction with some losses in front steering. On page 9 of the SC10 Manual, the installation of Rear Arm Mount is described (Part #9818). Place a spacer or washer above the rear chassis plate, but under the rear arm mount on each screw and you will have added a degree or two of anti-squat!
3. Change battery position. Changing your battery position is an easy way to move weight horizontally on your SC10. We recommend you cut the battery foam insert into two pieces. This will allow you to place your battery in more than 2 places (all the way in the front or all the way in the back). Read Battery Position and Adding Weights for more info.
We suggest you try moving your battery back to increase rear traction. Be careful though, moving the battery to far back will make the SC10 fly nose up which can be frustrating. To move your battery back, you will need to perform a small mod. Simply move the battery pivots (Part #9814) under the battery strap instead of on top of it. This will allow you to move your battery all the way back.
4. Change the front shock springs. If you are still running the springs that came with your SC10 it may be time to try something different. Using a stiffer spring in the front (Gold spring) will increase traction in the rear.
5. Change rear shock position. Moving your rear shocks into a more vertical position will improve rear traction when you are driving on a straight line, but will hurt rear traction when turning. Start with the the shocks in the middle hole on the top, and the inside hole on the bottom. Change the bottom mount if you want to make a more drastic change, and change the tops for more fine tuning. Remember, a less vertical shock will give you more traction around the corners, and a more vertical shock will give you more traction on straightaways.
6. Experiment with punch control. If you have an ESC/Radio system that allows you to set punch control, like the Castle Creations Sidewinder ESC, then you will probably want to use it if you are having trouble with rear traction on a loose track. The punch control basically tones down the punch on your SC10 and helps avoid spinning out when coming out of a turn. This setting is mostly about driver preference, but if you have a hard time controlling your truck while accelerating, you might want to drive 25%, 35%, or even higher punch control.