- Alexander Hagberg - Tech Tips - Body Mounting Positions -
I get asked this a lot about body mounting positions, and below I will try to explain how the position of the body will affect the handling of the car. The body in use here is the PROTOform LTC-R, which is by far the most commonly used shell for TC racing around the world today. It works very well for both carpet and asphalt surfaces - you can't go wrong with an LTC!
As can be seen in the first picture, I am measuring the distance from the lower edge of the frontshield, to the center of the front body post hole. This is my reference for measuring the mounting position of the body. In the first picture, the distance measures 71mm, which is my basic position for racing on asphalt. This has the body sitting quite far forward, to get the most possible front downforce (increased turn in, and an overall more aggressive feel).
For carpet, when a more mild steering feel is desired, I usually mount the body with a distance of 74-75mm. This will make the car roll more over the rear, and it won't be as twitchy initially. The car will also be more stable off power. This is important for carpet as that extra steering usually isn't needed, but a stable rear definitely is.
The next two pictures shows the way that I measure the height of the XRAY adjustable body mounts. This nice option makes it much easier to fine tune the height of the body. (Part no. 301351-O).
I have the front mount pinned through the 7th hole, counted from the bottom. And the 4th hole in the rear. The body mounts are set at 10.60mm both front and rear. The front may be lowered by 0.5mm or even more on asphalt, to try and generate more steering, as the lowered front body will give you more front grip. Be careful when running on bumpy or banked tracks though as the front lip of the body may start to drag, which will affect the cornering negatively. Have in mind that when the body is mounted more forward, you normally can't lower it as much in front as if it was in a more rearward position - this is due to the body posts sitting in the curved section of the front hood. Body mounted more forward = the body automatically becomes lower in front.
I cut the front lip of the LTC-R quite low, leaving only 2.5-3mm. This allows you to run the front of the body lower, without having problems with dragging.
I hope all of this proved helpful.