Best Wide Open Throttle Switches for Street and Race Cars
Wide Open Throttle (WOT) switches control nitrous or related systems by triggering activation precisely when the throttle is fully opened. This guide highlights five reliable options ideal for enthusiasts seeking consistent performance, easy installation, and dependable activation. The top picks cover a range of setups—from billet switches to micro-switch assemblies—so you can choose based on mounting style, compatibility, and install effort. This overview targets buyers who want straightforward, durable WOT switches for performance engines, hot rods, and racing applications.
| Product | Brand | Why It’s a Strong Pick |
|---|---|---|
| Nitrous Express 15516 Wide Open Throttle Switch | Nitrous Express | Under-pedal mounted, reliable nitrous release at WOT; solid for street/nocage setups. |
| Nitrous Express 15569 Wide Open Throttle Switch Billet Wide Open Throttle Switch for Use w/4150 Square Bore Carbs Incl. Mounting Bracket | Nitrous Express | Billet construction with mounting bracket; compatible with 4150 carbs; durable and stable. |
| Kickdown Microswitch Switch for ST400 Edelbrock AVS2 Carburetors Microswitch Bracket Kits Aluminum | Alpha Rider | Upgraded aluminum bracket; corrosion resistant; easy replacement for Edelbrock AVS2 setups. |
| Nitrous Express 15527 Wide Open Throttle Switch with Dominator Bracket | Nitrous Express | Compact WOT switch with a sturdy bracket; well-suited for pedal-mounted setups. |
| Nitrous Outlet WOT Switch & Bracket | Nitrous Outlet | Electronic activation and compatibility across brands; flexible mounting choices. |
Nitrous Express 15516 Wide Open Throttle Switch
The 15516 model is designed to be mounted under the gas pedal and releases nitrous when wide-open throttle is detected. It is best for buyers who want a straightforward, pedal-mounted solution that integrates with a standard nitrous setup. This option is particularly suitable for street and lightweight race applications where a simple, reliable activation point is preferred. A potential limitation is that mounting hardware is not included, so you may need to source brackets and hardware separately.
Nitrous Express 15569 Wide Open Throttle Switch Billet
The 15569 is a billet-wide open throttle switch intended for use with 4150 square bore carburetors and includes a mounting bracket. Best for readers who want a robust, billet option with a ready mounting solution for carbureted engines. Choose this if you need a solid mechanical switch that can endure high-throttle environments. A caution is that compatibility with carburetor types beyond 4150 square bore may require additional adapters.
Kickdown Microswitch Switch for ST400 Edelbrock AVS2 Carburetors
This microswitch kit from Alpha Rider is designed for Edelbrock Performer/AVS2 carburetors with an upgraded aluminum bracket. It provides a sturdy, corrosion-resistant solution that prevents damage during tightening and installs as a direct replacement for original parts. It is best for users who want a ready-to-install, reliable switch with a durable bracket. A limitation is that it is tailored for a specific carburetor family, which may limit broader compatibility.
Nitrous Express 15527 Wide Open Throttle Switch
The 15527 model is designed to be mounted beneath the gas pedal and ships with a compact design and a small package footprint. It is best for projects where space around the pedal is limited or where a discreet switch is preferred. The main caution is that the package dimensions are small, so check clearances in your pedal box to ensure proper activation without interference.
Nitrous Outlet WOT Switch & Bracket
The Nitrous Outlet WOT Switch & Bracket provides electronic activation compatible with any brand nitrous system. It is best for buyers who want flexibility across systems or who plan to upgrade components later. A practical limitation is that installation may require careful wiring to ensure consistent electronic signaling and avoid false activations.
Buying Guide: Key Considerations For WOT Switches
- Compatibility: Confirm throttle linkage, carburetor type (e.g., 4150 square bore), and mounting geometry with your engine setup.
- Mounting Style: Pedal-mounted vs. under-dash or bracket-mounted options affect ease of installation and space requirements.
- Construction: Billet or aluminum brackets provide durability in high-vibration environments; ensure corrosion resistance.
- Activation Method: Mechanical (microswitch) vs. electronic activation; consider reliability and wiring complexity.
- Hardware Inclusions: Some products exclude mounting brackets, hardware, or relays; budget for matching components if needed.
- Installation Footprint: Check dimensions and clearance to avoid interference with pedals, gas lines, or floor mats.
- System Compatibility: Ensure the switch is compatible with your nitrous kit’s activation pressure and wiring harness.
Frequently Asked Questions
- What is a Wide Open Throttle switch used for?
It signals a nitrous or throttle-based system to activate when the throttle is fully opened. - Do WOT switches require special wiring?
Yes, they typically connect to relays or electronic controllers; follow the manufacturer wiring diagram. - Are billet switches more durable than standard ones?
Generally, billet switches offer greater durability and a cleaner mounting aesthetic, especially under high throttle loads. - Can I mount a WOT switch under the gas pedal?
Yes, pedal-mounted switches are common, but ensure sufficient clearance and pedal travel for reliable activation. - Is a mounting bracket always included?
Not always; check product details and be prepared to source brackets separately if needed. - Will a WOT switch work with any nitrous system?
Many are designed to be brand-agnostic, but verify compatibility with your specific system and controller.