STEWART WARNER 813930 Rpm Greenline Tachometer Tach Sender 8K 3-3/4

( Brand: Stewart Warner ), ( Manufacturer Part Number: 813930 ), ( Unit Of Measure: Rpm ), ( Needle Color: Red ), ( Type: Tachometer ), ( Oe/oem Part Number: 813930 Tach Signal Sender ), ( Style: Greenline )

Review STEWART WARNER Vintage Sw 8k Rpm Greenline Tachometer Tach 3-3/4 And Sender

The **Stewart-Warner 813930 SW 8K RPM GreenLine Tachometer Sender** is a high-performance, precision-engineered speed sensor designed for automotive and marine applications where accurate RPM monitoring is critical. Part of the renowned GreenLine series, this sender combines durability, reliability, and cutting-edge technology to deliver real-time tachometer readings with exceptional clarity and consistency. Built to withstand demanding environments, the 8K RPM sender features a robust construction with a sealed housing and corrosion-resistant components, making it ideal for both on-road and off-road vehicles, as well as marine engines where exposure to moisture and vibration is common. Operating at an impressive 8,000 RPM capacity, this sender excels in high-performance applications, including turbocharged engines, supercharged vehicles, and heavy-duty machinery where traditional tachometers may struggle to keep up. The sender incorporates a Hall-effect sensor, ensuring precise and interference-free RPM detection, while its compact yet rugged design allows for easy installation in tight engine bays or hard-to-reach areas. Whether integrated into a digital or analog tachometer system, this sender provides smooth, lag-free performance, making it a trusted choice for enthusiasts, mechanics, and professionals seeking accurate RPM feedback. Its compatibility with a wide range of aftermarket and OEM tachometers further enhances its versatility, ensuring seamless integration into existing or upgraded engine monitoring setups. Built to last, the Stewart-Warner 813930 SW 8K RPM GreenLine Tachometer Sender represents a blend of innovation and engineering excellence, delivering the precision and reliability needed for serious performance applications.

**Pros and Cons of buying a Stewart-Warner 813930 (SW 8K RPM Greenline Tachometer Sender)**

1. **High RPM Rating** The 8,000 RPM capability makes it suitable for high-performance engines, including turbocharged, supercharged, or modified vehicles where stock tach senders may fail.

2. **Durability** Built with a robust construction, this sender is designed for long-term use in demanding applications, reducing the risk of premature failure.

3. **Compatibility** Works with most aftermarket tachometers, including those from Stewart-Warner, AEM, and other brands, making it versatile for upgrades.

4. **Reliability in Extreme Conditions** The Greenline series is known for handling high-speed and high-temperature environments better than standard senders.

5. **Easy Installation** Designed for straightforward wiring and mounting, though proper grounding and shielding are still required for optimal performance.

6. **Aftermarket Support** Widely available in the performance tuning community, with replacement parts and diagnostic resources if issues arise.

7. **Cost-Effective for High-Performance Use** While pricier than basic senders, it justifies the investment for engines pushing beyond 6,000 7,000 RPM.

1. **Higher Cost** More expensive than standard tach senders (e.g., OEM or basic 6K RPM units), which may be overkill for stock or lightly modified engines.

2. **Potential Overkill for Stock Applications** If the engine rarely exceeds 5,000 6,000 RPM, a cheaper sender may suffice without the need for 8K RPM capability.

3. **Requires Proper Shielding** Like all inductive pickups, it can pick up electrical noise if not properly shielded and grounded, leading to inaccurate readings.

4. **Limited OEM Compatibility** Not designed for direct OEM replacement in all vehicles; may require wiring modifications or adapters.

5. **Warranty Limitations** Some aftermarket tachometers may void warranties if paired with non-OEM senders, though this is rare with reputable brands.

6. **Installation Knowledge Needed** Improper mounting (e.g., misalignment with the flywheel or crank trigger) can cause false readings or failure.

7. **Potential for False Triggers** If installed near strong magnetic fields (e.g., alternators, injectors), it may register false RPM spikes.

The **Stewart-Warner 813930** is an excellent choice for high-performance engines, turbocharged applications, or any setup requiring reliable RPM readings beyond 6,000 RPM. Its durability and high RPM rating make it a trusted option among tuners, but its cost and complexity may not be justified for stock or mildly modified vehicles. If you re building a high-RPM engine or need a sender that won t fail under extreme conditions, this is a strong investment. For everyday driving or stock applications, a lower-cost sender may be sufficient.

- **Buy it if:** You have a turbocharged, supercharged, or heavily modified engine that regularly exceeds 6,000 RPM, or if you re building a high-performance setup where reliability at high speeds is critical.

- **Skip it if:** Your engine rarely exceeds 5,000 6,000 RPM, or if you re on a tight budget opt for a standard 6K RPM sender instead.

- **Consider alternatives if:** You need OEM-level compatibility (e.g., for a factory tachometer) or require a sender with built-in diagnostics (some newer models offer this).

- **Ensure proper installation:** Use high-quality wiring, proper shielding, and align it correctly with the flywheel or crank trigger to avoid false readings.

For most performance builds, this sender is a **solid, high-quality choice** just weigh the cost against your engine s actual RPM demands.

Details:

The Vintage SW Stewart Warner 8K RPM Greenline Tachometer Tach 3-3/4 face with Sender 813930 is a classic and reliable gauge for car enthusiasts. With a red needle on green background, this tachometer is easy to read and understand. The included sender unit ensures accurate and consistent readings, making it a must-have for car lovers looking to monitor their engines PMS. The Stewart Warner brand is known for producing high-quality automotive parts, making this tachometer a valuable addition to any vehicle.

part #: 813930 price

• $499.00

specifications boosttempgauges:

• brand: Stewart Warner
• mpn: 813930
• unit of measure: Rpm
• needle color: Red
• type: Tachometer
• oe/oem part number: 813930 Tach Signal Sender
• style: Greenline

seller boosttempgauges:

• rating: 99.9%
• # reviews: 8678
• city: Cincinnati, Ohio

returns boosttempgauges:

• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer

payments boosttempgauges:

• other
• wallet: Paypal
• credit card: Discover

shipping boosttempgauges:

• cost: $14.00
• type: Calculated
• transit: 3-9 Days
• service: USPS Ground Advantage
• class: Standard
• carrier: USPS

general boosttempgauges:

• Interior Parts Accessories > Gauges > Individual Gauges
• condition: Used

offer boosttempgauges:

• options: Ship-to-home
• sold: 0
• started: March 11, 2026
• availability: In Stock
• quantity: 1

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