’70 twin turbo ‘Cuda build by CJD AUTOMOTIVE

2 minute(s) of a 62 minute read

They each have there pluses and minuses.  An IRS's anti-squat (AS) and anti-dive (AD) cannot get close to what a decouple 3 link can do on a solid axle. An IRS's AS and AD are fixed by control arm position on the IRS's chassis.  On a decoupled 3 link, solid axle, the instant center (IC) points are independent for braking and acceleration and can be optimized for each without one affecting the other.  Basically you can set the car up for corner entry grip without killing acceleration grip off, and vice versa, something an IRS can never do.  In simple terms, the IC can be set to be below ground plane on braking, forcing the rear links to "pick up" the cars weight when the axle rotates forward, loading the rear to help braking and car balance..  If you left it that way, you would have no grip off the corner because as the axle rotates back under acceleration, you have no load on it.  So, decouple the "brake" link an use another for acceleration. This now puts the IC high and far forward of the car, forcing the rear links to "pick up" the cars weight when the axle rotates back, loading the rear for maximum grip. Hope that makes sense!