Growing up is over-rated https://wiki.powerracingseries.org/ 2026-05-06T02:13:18+00:00 https://wiki.powerracingseries.org/ https://wiki.powerracingseries.org/lib/exe/fetch.php/wiki:logo.png text/html 2025-02-13T02:58:34+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:batteries?rev=1739415514&do=diff Batteries You will need batteries! Batteries are governed by section 1.8 in the official rules. consult there for the most up-to-date/official determinations about technical specs. Generally, you'll be selecting either Lead-Acid batteries or one of the assorted Lithium Chemistries. text/html 2025-02-10T20:03:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:boms?rev=1739217838&do=diff Bill of Materials A “BOM” (or “Bill of Materials”) is typically a list of all the parts that go into making something. Some racers list all their parts, which is awesome because it serves as a shopping list (with prices) of what you might need to build a car, and it serves as a record of what it cost someone to build their car and stay within the $500 budget. (Remember, the $500 budget does not include the original ride-on toy vehicle or the safety items used on the car.) text/html 2025-02-13T07:25:05+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:brakes?rev=1739431505&do=diff Brakes Mechanical Brakes which can completely stop your kart in 18 feet are a required safety system. (1.13.3) while other style (band, Boden-cable disk) brakes have been common in the past, it's highly recommended that any new builds going forward use hydraulic disk brakes. Especially since your brake assembly does not count towards the cost of your vehicle on the BOM, (as is the case with all safety-exempt items) their usefulness should be prioritized. text/html 2025-02-13T07:41:04+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:bumpers?rev=1739432464&do=diff Bumpers Of all the safety aspects the Technical Inspector onsite will likely give you grief about at a race weekend, Bumpers will be at the top of the list. Save yourself the headache and design them well the first time. As governed by 1.13.1, Bumpers absolutely have to be made out of reasonably soft material like a text/html 2025-02-13T03:11:03+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:cars_batteries_amp_hours?rev=1739416263&do=diff Amp-Hours is a measure of the capacity of your battery -- it tells you how much energy is stored in your battery. Different racers/karts will use different amounts of energy to rocket their kart around the racetrack every moment, depending on factors like the overall weight of the kart or the mechanical losses in the kart design, etc. as you build a kart, you may care to take in to account how quickly your kart runs through the energy stored in the battery, so you can budget for how large of a … text/html 2025-02-13T03:07:03+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:cars_batteries_volts?rev=1739416023&do=diff Voltage is a measure of the potential difference across an electrical system. Your kart's operational voltage range (from fully charged batteries to empty batteries) must generally not exceed ~50v. Specific requirements about battery configurations which are and aren't allowed are always up to date on the official rules, section 1.8. text/html 2025-02-10T20:03:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:chains?rev=1739217838&do=diff Chains Chains are things you probably need... unless you use belts. A great list of things to check when your chain is misbehaving according to Jeremy from Baltimore Burners - 3/22/19: * Size of chain: #25 chain and T8F have smaller links, smaller teeth, so less engagement, less room for alignment error, and less room for tensioning error. most teams run #35 chain or larger. While #25 and T8F are capable of reliably driving a PRS car, the tolerances for doing so are much tighter and they a… text/html 2025-02-14T11:04:53+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:electrical?rev=1739531093&do=diff Electrical All of the electrical wire you use to wire up your entire kart does not count on your Bill of Materials. This is done by design so that karts do not skimp on wire size in an attempt to get their kart to fit the budget requirements. When you go to build and wire up a kart, please make sure the wire you select for each application is appropriately sized for the current you plan to flow through it. the guide on the American Wire Gauge below may be helpful to familiarize you with how wir… text/html 2025-02-10T20:03:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:failed_weld_-_possible_bad_weld_wire_filler_metal_or_low_amperage?rev=1739217838&do=diff Helpful Facebook Post & Comments ---------- Failed Weld - possible bad weld wire (filler metal) or low amperage August 17, 2014 JP: Quality welding wire makes a HUGE difference! I was shocked at the difference in splatter, arc striking, and porosity text/html 2025-02-14T11:15:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:frames?rev=1739531708&do=diff Chassis It is absolutely crucial for you to build a chassis for your kart. do not rely on the plastic ride-on children's toy you use to decorate you kart to suffice as your frame, even if it contains a mix of plastic and metal pieces. The typical chassis for a Power Racer is made of mild steel, usually square or round hollow tube stock, angle stock, or similar. these pieces can be purchased from a metal supplier, or scavenged from dumpsters, etc. Metal queen/double bed frame is a fair source o… text/html 2025-02-14T10:08:23+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:fuse?rev=1739527703&do=diff The Regulation Fuse Your kart must have the appropriate regulation fuse installed in the correct place in your circuit in order to compete at any event. The Technical Inspector will not permit you to race if you kart does not have the regulation fuse installed properly in your kart. text/html 2025-02-13T07:09:19+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:gears?rev=1739430559&do=diff Sprockets Some sort of gearing is needed to transmit and transform the power from the motor to the wheels, as most electric motors (barring hub-motors) spin with too great of speed and too little torque to power a wheel directly. a Sprocket/chain system is the most commonly used way to reduce the motor speed and increase the motor torque via this gearing to transmit power into the wheels. text/html 2025-02-13T03:17:17+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:killswitch?rev=1739416637&do=diff Battery Disconnect a regulation battery disconnect is a required safety system, as defined in the official rules section 1.13.2 The only approved disconnect is an “emergency stop” style button which disconnects power in the down position and allows it through in the up position. this device must either: text/html 2025-02-14T09:47:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:motor_controllers?rev=1739526434&do=diff Motor Controllers There are generally two types of motor controllers, which must match your type of motor: * Brushless * Brushed Since most existing karts and all recommended new builds contain Brushless (BLDC) motors, this wiki will focus on Brushless Motor Controllers. text/html 2025-02-14T05:11:45+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:motors?rev=1739509905&do=diff Motors You're going to need a motor. Or two. Or maybe 3 or 4. There are a variety of Motor options you can consider to build a power racer. MY1020 By far, the most common motor in the league in the 2020s is the BOMA MY1020 “Silver Can” type motor. this motor is sold with a variety of stickers/ratings, some of which are particularly different than others. text/html 2025-02-10T20:03:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:my1020_electric_scooter_motor_24vdc_500w?rev=1739217838&do=diff 24 Volt 500 Watt MY1020 Motor 24 Volt 500 Watt MY1020 Electric Motor with 11 Tooth #25 Chain Sprocket Purchased from eBay for $50 (August 2014) with this description/specs: New MY1020 type replacement motor with mounting bracket for electric scooter, mini bike quad and Go-Kart. text/html 2025-02-10T20:03:59+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:myster_bom?rev=1739217839&do=diff Marshall Sholtz: from facebook oct 4, 2018 i haven't, (though have one mostly finished) but as the mystery machine raced in milwaukee, the bom is probably * ~$300 * $25 alternator core * $29 motor controller * $4 buck converter * $123.76 battery /2 = $61.88 text/html 2025-02-10T20:03:59+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:mystery_bom?rev=1739217839&do=diff Marshall Sholtz: from facebook oct 4, 2018 i haven't, (though have one mostly finished) but as the mystery machine raced in milwaukee, the bom is probably * ~$300 * $25 alternator core * $29 motor controller * $4 buck converter * $123.76 battery /2 = $61.88 text/html 2025-02-10T20:03:59+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:steering?rev=1739217839&do=diff Steering Steering is a crucial component you must get pretty close to right for you to have a good time at your race weekend. The way you will want to design your steering is going to depend on your drivetrain; primarily if you have a live or dead axle. text/html 2025-02-13T06:52:27+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.powerracingseries.org/doku.php/cars:wheels?rev=1739429547&do=diff Wheels There are a variety of sizes and configurations of the assorted wheel, rim, hub, tire etc that people will use on different vehicles, powered and unpowered. it can feel overwhelming at first to take a first stab at setting up the wheel assembly for a Power Racer; hopefully this document will help.