Originally posted by Tumbleweed13
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Let me start by saying that the method of using this calculator has LOTS of controversy surrounding it. Even using a calculator has a LOT of controversy surrounding it, Heck, just bringing the topic up on Pirate can cause a thread with hundreds of opinions and posts.
That said, and since this is a smaller venue, I'll post the guidelines that I have gleaned from many posts and the extensive research that Dirtman13 has done. Keep in mind, there will be many folks willing to argue the guidelines that I have below, so take this as just my opinion:
- Make the control arms as long as you reasonably can
- The length of the upper control arms should be 70% to 75% of the lower control arm length
- A vertical separation of the mounting points of the upper and lower arms at the axle should be at least 6" or more
- The vertical separation at the frame mounting points should be 70% to 75% of the vertical separation distance at the axle
- The lower axle mounting points should be as wide as reasonably possible
- A high roll axis center is good: 25" to 27" if possible
- Shoot for 0% Roll Axis (+/- 2%)
- The Anti-Squat should be between 70% and 80% for rock crawling and road manners.
- The total Anti-Squat (AS) changes from full droop to full bump. The total AS should be between 50% and 120%.
Additionally, all of the measurements are in the plane of the ground or 90 degrees from the ground. True flat and true vertical. The length in the calculator of a control arm is not the actual length of the arm. Instead it is the distance from the centers of the mounting points in a straight line level with the ground. Same principal for the vertical separation measurements.
I hope that this helps.
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