Firstly, where is your engine? If it's beside you (which it is), would it be possible to sit in the middle of the chassis? (No it wouldn't!). Because of the engine, the seat is (usually) be mounted to one side as there's little choice about that!.
The steering column is mounted 'off to one side' deliberately to be in front of an off-centre seat. If you doubt that, measure where it's welded to that lower 'rail'. You can also often see this effect by measureing the length of the track rods, too, which are usually of different lengths to make up for the offset. Not only that, the steering column is mounted at an angle too as it needs to be more offset nearer the drivers body than it does for his feet!
However, the pedal are (roughly) evenly placed side to side. So, if the seat (off to one side) was mounted 'straight' in the chassis, then your left leg wouldn't be able to reach the brake pedal. To keep you (roughly) the same distance from each pedal, the seat needs to be mounted at an angle.
The seat height can be judged by looking at, or measuring (with a tape), the heights of the highest point of the BACK of the seat on both sides. You can then measure the highest point of the FRONT of the seat on both sides. If it's MILES out (30 or 40mm or more) then it's probably make driving uncomfortable.... however, if it's NOT uncomfortable, it hardly matters.
Seats should be mounted with refernce to the weight distribution and NOT a set of measurements in millimetres unless you are the PERFECT size and shape for a kart racer (a miniature bag of skin and bones no taller than 5'6"). If you are not that shape and size, measurements of the seat position with a tape make no sense!
Ian
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seat position by 's1jor1' (15 Mar 2012 @ 14:49)
