[robnolimit]

Lets talk Anti-Squat. For the most part, this is a comparison number. A way to say, "this is where the rear suspension lifts the truck". You may not know exactly where your 'anti-squat' is, but understanding it, and using it as a chassis tuning tool, will help. To understand anti-squat, we need to define a few things. CG (center of gravity), this is the balance point of the truck, both front to back, and top to bottom. As an estimate, say 58% of the wheel base (58% nose wieght) appx 68", and for hieght, say the center of the cam, appx 24" for a dropped truck. IC (Instant Center) this is the point where the suspension forces push on the chassis. For a leaf suspesion, we use the center of the front spring eye, for trailing arms, use the center of the front pivit. CC (contact Center) The center of the contact patch of the rear tire. Now that you have these 'points', draw a line from the CC, throught the IC, and contiue on that line until you pass the front/rear balance point. So, what do you do with it? First, you need to 'scale' your CG line. At the ground, you have 0% anti-squat. At the CG, you have 100%. You need to calculate where your 'force line' crossed your 'scale'. I try to set most projects up at close to 100%, with tuning room on either side. Below 100% = more lift on the front of the truck, the rear will sink some, more force pushing forward. Above 100% = more lift on the rear of the truck, the tires plant firm, but less force is pushing forward. The goal is to get all the downforce you need to keep the tires planted, and still push the truck forward as hard as you can.