Ignition & Start Switch 50-506

OVERVIEW

When you''re building a high-performance air-cooled machine, whether it''s a strip-ready Beetle, a rugged Baja Bug, or a custom Sand Rail, the stock ignition switch often becomes a weak point in your electrical system. The QuickCar Racing Products Ignition & Start Switch (Part #50-506) is the ultimate solution for enthusiasts looking to streamline their dashboard while increasing reliability. This heavy-duty, all-in-one switch eliminates the need for separate toggle switches and push-button starters, combining the "Ignition On" and "Momentary Start" functions into a single, high-quality component. Designed to withstand the vibrations and harsh environments common in racing and off-road applications, this switch ensures that your engine fires up every time you hit the track or the dunes, providing a tactile and positive engagement that cheap plastic switches simply cannot match.

As a master specialist here at Appletree Auto, I can tell you that electrical gremlins are the number one cause of "Did Not Finish" (DNF) results in the air-cooled world. The QuickCar 50-506 is engineered with a robust internal architecture capable of handling a 25-amp load at 12 volts, making it a powerhouse for your ignition circuit. Its compact design fits perfectly into a standard 1/2-inch mounting hole, making it a breeze to install in custom aluminum dashes or fiberglass buggy pods. This is a direct replacement for the switch found in the QuickCar 50-507 kit, but its versatility makes it a go-to choice for any custom wiring harness project where simplicity and durability are the top priorities. Don''t settle for a factory switch that was never meant to handle the rigors of performance driving; upgrade to a professional-grade solution that reflects the quality of your build.

FITMENT

This switch is a universal performance component, but it is highly recommended for the following air-cooled Volkswagen and custom applications:

• Volkswagen Beetle: 1950-1979 (All custom dash configurations)
• Volkswagen Karmann Ghia: 1955-1974 (Custom race or street builds)
• Volkswagen Type 2 Bus / Transporter: 1950-1979 (Ideal for simplified campers or race buses)
• Volkswagen Type 3 (Squareback, Fastback, Notchback): 1961-1973
• Volkswagen Thing (Type 181): 1973-1974
• Dune Buggies & Sand Rails: All years and models (Meyers Manx, Berrien, etc.)
• Baja Bugs: Custom off-road builds requiring ruggedized switchgear
• Kit Cars: Bradley GT, Sterling, and other VW-based replicas

SPECS

• Brand: QuickCar Racing Products
• Part Number: 50-506 (QRP50-506)
• Switch Type: Toggle Style Ignition & Momentary Start
• Positions: 3-Position (Off - On - Momentary Start)
• Amperage Rating: 25 Amps at 12V DC
• Mounting Hole Diameter: 1/2 Inch (12.7mm)
• Terminal Type: Screw terminals for secure wire retention
• Housing Material: High-impact industrial-grade composite and metal
• Application: Direct replacement for QuickCar Start Kit #50-507
• Weight: 0.1 lbs

PRO TIPS

1. Always Use a Relay for High-Current Starters

While this QuickCar switch is rated for a stout 25 amps, many high-torque air-cooled starters can pull significantly more amperage during the initial cranking phase. To ensure the longest possible life for your new switch, I always recommend using the switch to trigger a high-quality 40-amp or 70-amp relay. By running the "Momentary Start" wire to the relay coil rather than directly to the starter solenoid, you reduce the heat and electrical load passing through the switch contacts. This setup prevents internal arcing and ensures that your ignition system remains reliable for years to come, even in high-compression engine builds.

2. Secure Your Wiring with Proper Strain Relief

In the world of off-road Beetles and Sand Rails, vibration is the enemy of every electrical connection. When installing the 50-506 switch, make sure you use high-quality ring terminals on the screw-down posts and tighten them firmly. Once connected, use a zip-tie or a specialized cable clamp to secure the wiring loom to a structural part of the dash within three to four inches of the switch. This prevents the weight of the wiring harness from tugging on the terminals as you bounce across rough terrain. If the wires are allowed to vibrate freely, they will eventually fatigue the copper or loosen the screw terminals, leading to intermittent starting issues or a complete electrical failure.

3. Protect the Switch in Open-Cockpit Vehicles

If you are installing this switch in a Sand Rail, Manx-style buggy, or a race car without a windshield, it is exposed to dust, moisture, and debris. Even though QuickCar builds these switches to be tough, I recommend adding a rubber toggle boot cover (available separately) to the exterior of the switch. This simple addition seals the toggle mechanism against silt and rain, which can eventually work their way into the internal contacts. Additionally, a dab of dielectric grease on the rear screw terminals will prevent corrosion in humid or coastal environments, ensuring that your air-cooled VW is always ready to roar to life the moment you flip the toggle.