Adjustable Voltage
Issues
· Purchasing multiple motors to find one “magic” motor
· Having to purchase multiple gears to find the right one for the car and voltage mix
· Limited by low gears in some series
Details
The issue with many if not all of our series is developing a set of rules that make racing as fair as possible while allowing the skilled racers or car builders to excel. A typical set of rules would do this by setting limits on motors, gearing, wheels, tires. All of this is done with a stated voltage for the series.
In the past these rules have accomplished their goal of keeping the cars closely matched while providing some great on track battles. Having said that, members driving skills, their ability to set up cars, the track’s grip and care and maintenance of tires have all improved.
All of this means is that some racers have maxed out the available gearing to where the quality of the motor now plays a larger role in the final results. This leads to racers spending more money on motors hoping to find the one “magic” one that has a slightly higher RPM rating at a given voltage.
For example, let’s take the clubs most popular series - the Slot It Group C series. The rules regarding motors have everyone running the same Slot It MX16 V12 motor rated at 23K rpm (@12volts) and the voltage for the series at 11volts. Just these two rules have the majority of the racers running the lowest possible gearing available from Slot It* – 9t pinion with a 23t crown or a 2.56 gear ratio.
*It’s possible to run a 10t pinion to get a lower gear ration but the gear mesh between a 10t pinion and a 23 or greater crown is poor and causes its own issues in terms of braking and motor wear.
Proposed Solution #1 – Adjustable Voltage
If each racer at each drivers station was allowed to set their own voltage for that specific race they would not have to spend so much time trying to find the “god” motor or the perfect gearing as they could adjust the voltage to their car with its motor and gearing on the specific lane you are running and with the level of skill you were bringing to the track on that day. Image having a boost knob you could turn up to give you more power.
Proposed Solution #2 – Raise the Voltage
Raise the voltage for all series to a minimum of 12v so there is some room for racers to have a wider range of gears to choose from to get the performance of their car where they want it.
Raising the voltage of the Slot It Group C series to 12v would have the effect of increasing the RPM of the rear wheels by a little under 11%. This would be enough for some of the fast guys to move to a 24t or 25t crown and give them the ability to run a 23t if they were really on top of their game.
Please use the forum to post all of your comments and concerns.
