b'TECH TIP PAGE Tech Tip 28: Lets compare Torque Arms versus 3-Link rear suspension design. A pro of the Torque Arm suspensions is that they are simple & easy to set up. Torque Arms dont require any tuning, because other than length, they are basically non-adjustable. The key is choosing the right length of arm, because in most cases, the length cant be changed.Shorter arms provide higher Anti-Squat, more loading of the rear tires on initial & early accelerationless on later accelerationand even less on corner entry under hard braking, unless it is decoupled. A longer Torque Arm simply reverses these characteristics.A good road race rule of thumb is for the Torque Arm pick up point to be under the Cars CG. For Autocross, we want a shorter arm, due to the lower track speeds.The primary advantage of a 3-Link is the tunability. With holes in top link brackets, or a jack screw adjuster, we can change the intersect point of the upper & lower links (Instant Center) and therefore the Anti-Squat percentage. We can tune the car for the optimum balance of rear grip on entry versus exit, for different tracks, drivers and/or weather conditions.Why Decoupled? All rear suspensions, except decoupled versions, experience opposite effects of Anti-Squat on corner entry versus corner exit. A car with 70% Anti-Squat will have great rear tire loading & grip on corner exit, but experience significant rear tire unloading & lack of grip on corner entry, under braking. Lowering the Anti-Squat reverses this.But it is always a compromise. Racers try to find the most acceptable Anti-Squat compromise that gives them the most rear tire grip on corner exit, without being loose on corner entry.A decoupled 3-Link or Torque Arm is a game changer. Decoupling means we have separate links active/functional for braking on corner entry than we do on for acceleration on corner exit. The difference is huge. We dont have to suffer any consequences, because the Accel Link is not active/functional under braking on corner entry. Only the Decel Link is active & functional under braking & we will have it adjusted at zero Anti-Squat up to 100% Pro-Squat We can run the Decel Link level for zero anti-squat or pointed uphill going forward to create Pro-Squat. This is the opposite of Anti-Squat & actually loads the rear tires significantly under brakinginstead of unloading themlike it would with Anti-Squat. Now, on track, we have the best of both worlds.Tech Tip 29: Designing race car suspensions involve many factors. Somecomplex. Some straightforward like understanding shear. For example,when you mount a bolt in double shear, it is literally supported on both ends,cutting the shear forces in halflike the example inside the red circle here. When you mount a bolt in single shear, like the blue circle, we are putting allthe shear forces trying to bend, break or shear the bolt off. Thats OK if wehave a strong enough bolt. RSRT utilizes 5/8 170KSI bolts (rated at43,500#) for all single shear lower shock mounts Front & Rear.254'