Since the announcement of the TLR 5th scale buggy we've received lots of questions regarding the extra setup and tuning options in this car compared with the 5ive-T. Multiple tuning options that will give the car a better handling. Adjustments where all the 10th and 8th scale drivers are already familiar with but we didn't have those options in 5th scale, yet! We explain Front Kick-up, Rear Toe-in and Anti-Squat!
This article will guide you through the basics of setting the geometry of your TLR vehicle. We felt the need to explain some tuning options after the reveal of the 5ive-B which is available End of July 2016. Of course there are lots of tuning options which are also available on the 5ive-T such as differentials, droop, camber, ride height and so on. But the TLR buggy does come with some magical inserts to adjust the position of the suspension arms called Front Kick-up, Rear Toe-in and Rear Anti-Squat.
The key is the adjustable hinge pin brace
5ive-T owners are already familiar with the hinge pin brace to mount the suspension arms on the vehicle. Now TLR is creating a 5ive where the braces are adjustable with the use of inserts. This is already used in the 8ight cars and we love these inserts! The inserts are numbered with 0, 1 and 5 which refers to the amount of degrees affected to the hinge pins and thus the position of the suspension arms.
Let's begin with the front of the car. Kick-up is the angle between the ground and the lower inner hinge pins on which the suspension arms swing. Increasing front kick (increasing the angle of the hinge pin in relation to the ground) will increase off-power steering and forward traction, as well as bump absorption. Decreasing front kick will decrease off-power steering and increase on-power steering, but is less forgiving in bumps.
For example you run your buggy on a hard packed surface with less bumps and high speed sectors. On such a track you want probably a minus degree kick-up. On a more technical and narrow track with bumps you'll have to increase your kick-up couple of degrees.
Front-kick has also a direct effect on the caster. While the 5ive-b only comes with fixed angle spindles, caster isn't part of this tutorial.
People who don't understand Toe-in probably thinks the car has been broken. Toe-in affected the angle of the rear wheels and a extreme inside toe looks strange but is very effective to tune the handling of the car.
Less rear toe-in will increase the wheel base of the buggy and put the wheels in a more straight line. This will decrease forward traction, but will increase top speed and side traction in the middle of a turn. More toe-in will increase forward traction, have more off-power steering and less side traction.
For example you run your buggy on a hard packed surface with less bumps and high speed sectors. On such a track you want less toe-in as possible. On a more technical and narrow track with bumps you'll have to increase toe-in a couple of degrees.
Anti-Squat is the same as Front-kick but now at the rear of the car. Anti-Squat means the relation of the hinge pins in relation to the ground. You can setup this angle from 1° to 3° in steps of 0.5 degree. Anti-squat is a suspension adjustment that, as the name implies, limits how much the rear suspension squats under acceleration.
As you've probably noticed, when a vehicle accelerates, the rear end squats down. Anti-squat controls this. When the rear squats, weight is being transferred to the rear. It is important to note that anti-squat really only has an impact on handling while accelerating or braking.
Running less anti-squat will have less offpower steering and roll (side to side) more on the rear. Less anti-squat will accelerate better in small bumps and have more traction on throttle. More anti-squat will have more support (side to side) and be better on rough tracks with big jumps.
For example you run your buggy on a hard packed surface with less bumps and high speed sectors. On such a track you want probably less anti-squat. On a more technical and narrow track with bumps you'll have to increase your anti-squat a couple of degrees.