Birel caster

[kdghorpade]

The caster eccentric has no marking/ gradations as in some other chassis. What is the inclination for different eccentric positions ?

[Garry Lobaugh]

There are two types. One is silver and one is black. Tell me please which one we are talking about.

[kdghorpade]

I am refering to a black one, and the kart is a R31 SV

[Garry Lobaugh]

Thank you . We are working on an set of photos and pictures with description to your question. It is a good lesson for us all and thank you for asking. Give me 24 hours to get it all prepared. MRP will provide a link to our www.gobirel.com site that will feature this discussion.

[kdghorpade]

Appreciate that. If possible pls notify when reply is posted

[Marc Miller]

kd - here you go: http://www.mrpmotorsport.com/community/showthread.php?p=3686#post3686

[kdghorpade]

Mark, our kart seems to have a neutral pill on the bottom and a 1 degree on the top. However, when we need to make a camber setting, we are doing it by adjusting the top pill. Does this mean we are setting camber (using a sniper) to the desired value and the caster is automatically a default value corresponding to the set camber ? Also, what is ithe direction of ncreased caster ; kingpin inclined inward or outward ?

[Marc Miller]

Your best bet to keep your caster setting is by adding an offset pill in the bottom as well to adjust caster. This would allow you to keep the caster change in it. So yes, that is what you are doing is defaulting your caster setting to stock when adjusting the top to camber.

To increase caster, you are tilting the top of the spindle back.

Increasing the amount of caster increases steering effort and makes the kart track straighter. It might even make the kart feel more stable in faster sections. It also increases tire lean when cornering, effectively creating more negative camber the more you turn the wheel.

With that said, it doesn't necesaarily provide more mechanical grip and sometimes can provide too much or make driving uncomfortable. Testing testing testing is important to learn what conditions work best for a lot of caster or very little.

For instance, when I road-raced, we took as much caster out of the kart as possible. It wandered more but kept the kart free-er and was able to sustain higher corner speeds for longer. What it gave up in very tight sections of the track in weight jacking, it made up in faster sweepers.

Best of luck.