Cable ties are not adequate for holding lead on their own. Most scrutineers that I have come across have insisted that the lead has at least one bolt through it. Each weight must be secured by two mechanical fastenings and one might get away with claiming a cable tie is a mechanical fastening.
I suppose it is better than using duct tape.
The exact figure will vary with the kart and the track, Normally somewhere between 40:60 and 45:55 as track conditions vary from wet to hot and dry.
The problem comes with turning in. The weight needs to come off the rear wheels to help the inside lift, it needs to go on to the front to help front end grip and jacking, but not so much that the kart loses balance.
It will be affected by the driver's driving position, the use the driver makes of the brakes, the caster set into the kart, the flexibility of the chassis and the width of front and rear tracks.
Also by the driver's experience. It is no good setting up lead to the nearest 1mm if the driver is out on the marbles. It is no good setting up the lead if the driver is braking in the turn (the kart is 2 times as likely to slide under braking than under acceleration. Simply turning is a form of braking, the fronts create a braking effect by being at an angle to the direction of travel and the change in direction is technically a deceleration.( a change of velocity, velocity being speed in a straight line).
So while getting the distribution right is important, getting it right to the three decimal places of computer weighing is not very useful with a novice cadet. I am assuming novice because it is the sort of thing one learns with experience.
To calculate where the weight might be, look up the calculation of weight and balance on the web.
It is fairly simple once one has grasped that the unit is the 'moment', the weight multiplied by the distance from a pivot point. So an 8kg weight 100mm from the rear axle has the same moment as a 2kg weight 400mm from the axle.
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Corner weights cadet kart by 'Bulldog1303' (27 Oct 2013 @ 19:44)
