Hks-va028-v2.0 May 2026

The HKS-VA028-V2.0 is a dual-display digital panel meter designed for real-time monitoring of DC voltage and current. It is widely used in DIY electronics, solar power systems, and automotive diagnostics due to its compact size and integrated shunt (for the 10A model). 🛠️ Key Technical Specifications Voltage Range: 0 to 100V DC.

Current Range: 0 to 10A DC (typically includes a built-in shunt).

Operating Voltage: 4V to 30V DC (required to power the meter itself).

Display: 0.28" dual LED; typically red for voltage and blue/green for current. Accuracy: Approximately ±1%. Refresh Rate: ~300ms to 500ms. 🔌 Wiring and Pinout

The device usually features a 5-wire configuration divided into two harnesses: hks-va028-v2.0

The HKS-VA028-V2.0 is a 0.28-inch dual-display LED module designed to monitor DC voltage (0–100V) and current (0–10A) in real-time, often utilized for tracking automotive engine management systems. Engineered for high-performance environments, it features a 5-wire design and offers ±1% accuracy for electrical monitoring, withstanding high vibrations. For more information, visit AliExpress AliExpress

Technical Specifications

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HKS-VA028-V2.0 — Comprehensive Overview, Features, and Practical Guidance

Usage Notes

• Pairing: The V2.0 valve must be used with a compatible HKS EVC main unit. Mixing a V2.0 valve with older V1.0 firmware may cause calibration errors.
• Installation: Requires proper vacuum line routing and electrical connection to the EVC unit. A factory service manual for the vehicle is strongly recommended.
• Calibration: After installation, the unit must undergo “self-learning” or “setup mode” to calibrate the valve’s zero and full-stroke positions.

Tuning and Calibration: Making the V2.0 Sing

Simply bolting on the HKS-VA028-V2.0 will not magically perfect your boost curve. You need a recalibration of your standalone ECU (MoTec, Haltech, Link, or AEM).

Boost Control Strategy:

• Open loop duty tables: Start with a base duty cycle of 30% at 3000 RPM, rising to 65% at redline.
• PID settings (closed loop): The V2.0 has minimal hysteresis. Set P-gain to 1.5, I-gain to 0.8, D-gain to 0.2. Over-aggressive PID will cause the 50mm valve to “chatter.”

Real-world results from a Nissan RB26 dyno (98RON fuel): The HKS-VA028-V2

• Stock internal wastegate: Boost fell from 1.4 bar to 1.1 bar by 7500 RPM (creep + drop).
• HKS-VA028-V2.0: Solid 1.45 bar from 4200 RPM to 8500 RPM. Hold within 0.03 bar variance.

The Hacker’s Guide to the HKS VA028 V2.0 (AFR Type-M)

The Legend: The HKS VA028 V2.0 is not just a resistor trick; it is a sophisticated, standalone piggyback fuel controller designed in the golden era of tuning. While modern ECU flashes have largely replaced it, this unit remains a favorite for older platforms (like the MR2, Supra, and RX-7) where OBDII flashing isn't an option or where a standalone ECU is overkill.

This guide focuses on the V2.0 revision, which introduced crucial improvements in processor speed and display clarity over the V1.

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Product Guide: "hks-va028-v2.0"

Installation Deep Dive: Do It Right the First Time

Installing the HKS-VA028-V2.0 is not a beginner task. Here is a professional step-by-step summary:

Tools Required: 4mm and 6mm Allen keys, torque wrench (set to 18–22 Nm for flange bolts), copper anti-seize, vacuum line (3.5mm ID). install no shims. For 1.2–1.5 bar

Step 1 – Manifold Preparation Remove the blanking plate from your turbo manifold’s wastegate port. Clean gasket surfaces with a razor. Do not reuse old gaskets – HKS supplies a metal embossed gasket in the V2.0 box.

Step 2 – Spring Selection The V2.0 ships with a 0.8 bar spring. For low-boost applications (<1.0 bar), install no shims. For 1.2–1.5 bar, add the included 0.3mm shim. For racing (>1.8 bar), purchase the HKS VA028-SPRING-HD kit.

Step 3 – Mounting the Unit Attach the wastegate to the manifold using the supplied studs and brass nuts. Critical: Apply copper anti-seize to the stud threads. Torque in a cross pattern to 20 Nm.

Step 4 – Vacuum Reference Connect the side port (closer to the valve diaphragm) to a dedicated boost source after the throttle body. The top port (cap on V2.0) can be left open or used for a boost controller’s top port reference. Use fuel-grade vacuum line, not silicone (silicone collapses under high heat).

Step 5 – Dump Tube The V2.0’s exhaust outlet requires a V-band clamp. You must plumb the dump tube back into the downpipe or vent to atmosphere (check local noise/emissions laws).