b'TECH TIP PAGE o Tech Tip 28: Lets compare Torque Arms versus 3-Link rear suspension design. A pro of theTorque Arm suspensions is that they are simple & easy to set up. Torque Arms dont requireany 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 & earlyaccelerationless 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 jackscrew 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 reargrip on entry versus exit, for different tracks, drivers and/or weather conditions.Why Decoupled? All rear suspensions, except decoupled versions, experience opposite effectsof Anti-Squat on corner entry versus corner exit. A car with 70% Anti-Squat will have greatrear 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 compromisethat 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 separatelinks active/functional for braking on corner entry than we do on for acceleration on cornerexit. The difference is huge. We dont have to suffer any consequences, because the AccelLink is not active/functional under braking on corner entry. Only the Decel Link is active & functional under braking & we will have it adjusted for low to zero Anti-Squat or Pro-Squat.We can run the Decel Link level for zero anti-squat or pointed uphill going forward to createPro-Squat. This is the opposite of Anti-Squat & actually loads the rear tires significantly underbrakinginstead 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. Some complex. 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 all the shear forces trying to bend, break or shear the bolt off. Thats OK if we have a strong enough bolt. RSRT utilizes 5/8 170KSI bolts (rated at 43,500#) for all single shear lower shock mounts Front & Rear.398'