We have this in the WIP manual (page 10), and will surely update it to contain more info, yep Chassis types
In real world slot car racing, Inline chassis is the most common. The drive shaft runs lengthwise down the chassis. It offers a better barycentre position, being closer to the front guide pivot, but has the disadvantage of reverse motor torque transferring weight from side to side, destabilizing the car. Sidewinder and Anglewinder are often seen as superior chassis. During acceleration the reverse motor torque transfers weight to the front helping keep the guide in the slot. Sidewinder suffers from more drift due to its farther barycentre position with Anglewinder being the best compromise.
Adding more weight to the front or centre should decrease drift of your car since it will bring the barycentre closer to the middle of the car.
Adding more weight to the rear will increase traction if you are using for example rubber tyres, which provide the least traction, thus may offer better rate of acceleration, but this must be balanced against possible increase of drift.
Adding more weight anywhere will decrease rate of acceleration, so balance this against the advantages - each player will be different, no one solution will fit all.
Select lower gear ratio for higher top speed. This can help on tracks that have long straights where you can really make up a place or two in one lap.
Select higher gear ratio for higher rate of acceleration. This can help on tracks that have many tight corners where it is hard to get to top speed, allowing you to quickly zip from one corner to the next.
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