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Hi 32819toon
There's so many different sorts of slot car, some of the things that make a big differance in some sorts of slot car are insignificant in others.

I guess it is fairly obvious to an RC racers that the motor makes a differance. Some rules allow the motor to be stripped and serviced, some don't. There's quite a bit to be gained from getting motors set up properly, but obviously that can only be done where the rules allow.
Gear ratio changes can make quite a differance to some car's characteristics.
Which make of gears is best depends on which sort of car you are using. Gears than run true and efficiently absorb less power. Gears that strip are obviously not good.

Getting the car picking up properly is essential, in a lot of cars that means getting the guide height just right is vital.
Getting the front ride height and the balance between load on the front wheels and load on the guide right makes a big difference to the handling of some types of car and much less differance to other types.
The guide should pivot freely, but not rock from side to side - with some chassis this more or less happens anyway, others need some tuning.
Which guide you can use depends on the chassis.

The way various bits flex, the way the body floats can also make a lot of difference, but there is little scope for that sort of thing with basic home set slot cars.
 

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QUOTE (32819toon @ 26 Sep 2011, 19:19) <{POST_SNAPBACK}>The point I made about the slot guide is because the front of the car will always follow the guide slot, provided you don't de-slot the car by entering the corner too fast. In RC, the front of the car's handling is essential as you need to get the car to be balanced on the corner,not understeer too much and not be too loose, and also be able to turn in sharply on a tight corner.
Coming from a radio control background, slot cars look deceptively simple. In fact there is a lot that can be done to maximise performance and handling of slot cars.
Slot cars can (and frequently do) deslot going round a corner or on the exit to a corner as well as on entry.
In slot cars the front of the car is also essential to the handling of the car.
Two of the most important aims of tuning a slot cars are quicker lap times and fewer deslots.
Some of the things that help with that are
..So they can go into a corner faster without deslotting
..So they can go round a corner faster without deslotting
..So they can accelerate out of a corner earlier without deslotting
..So they can be consistently driven round corners closer to the limit of adhesion and/or deslotting
The guide and how it's set up is one essential component in all of that. With some cars there are substantial gains to be made by carefully adjusting the guide; on others the guide can be left as it is while other parts of the car are adjusted.
 
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