Pelican Parts 1979 Porsche Voltage Regulator: A Complete Buying Guide

If you own a 1979 Porsche, maintaining the electrical system is critical for reliable performance. The voltage regulator plays a key role in controlling alternator output and preventing battery overcharging or undercharging. When it fails, you may notice dimming lights, a dead battery, or erratic gauge readings. Pelican Parts is a trusted source for Porsche parts, offering both OEM and aftermarket voltage regulators tailored to your 1979 model. This guide covers what you need to know before buying.

Understanding the Voltage Regulator in a 1979 Porsche

The voltage regulator works with the alternator to maintain a steady voltage level, typically around 13.5 to 14.5 volts. In 1979 Porsches, such as the 911 SC or 928, the regulator is often built into the alternator or mounted separately on the fenderwell. A malfunctioning regulator can cause the alternator to overcharge, leading to battery damage, or undercharge, leaving you stranded.

How It Works

The regulator senses battery voltage and adjusts the alternator's field current accordingly. If the voltage drops, it increases output; if it rises too high, it reduces output. This balance prevents electrical components from being fried and ensures the battery stays properly charged.

Common Voltage Regulator Problems in 1979 Porsches

Older Porsches are prone to regulator issues due to age, heat, and vibration. Symptoms include:

• Battery warning light on the dash that stays lit or flickers.
• Headlights that dim or brighten as engine RPM changes.
• Frequent battery drain or inability to hold a charge.
• Burning smell from the alternator area.
• Gauge fluctuations in voltage or ammeter readings.

If you experience any of these, testing the regulator is straightforward with a multimeter. Set the engine to idle and measure battery voltage—it should be between 13.5 and 14.5 V. If it's outside that range, the regulator likely needs replacement.

Voltage Regulator Options at Pelican Parts

Pelican Parts offers several choices for a 1979 Porsche voltage regulator, depending on your model and preference for originality vs. performance.

OEM Bosch Regulators

Bosch was the original equipment supplier for Porsche. Pelican Parts stocks genuine Bosch voltage regulators that match factory specifications. These are plug-and-play for a 1979 911 or 928 and ensure correct voltage setpoints. Prices typically range from $50 to $100. Choosing OEM guarantees fitment and longevity, but they may be more expensive than aftermarket alternatives.

Aftermarket Regulators

Several reputable brands produce voltage regulators for vintage Porsches, such as Hella, Beru, or Standard Motor Products. These are often less expensive than Bosch (ranging from $30 to $70) and perform reliably. Some aftermarket units feature solid-state electronics that are more heat-resistant than older designs. Pelican Parts lists these options with clear compatibility notes, so you can match them to your alternator type.

Internal vs. External Regulators

Most 1979 Porsches use an external voltage regulator mounted separately from the alternator (common on 911 models). However, some 928 models have an internal regulator built into the alternator. Verify your car's setup before ordering. Pelican Parts filters allow you to narrow down by model and year, making it easy to find the correct part.

How to Choose the Right Voltage Regulator for Your 1979 Porsche

When selecting a voltage regulator, consider these factors:

• Model Year and Engine: 1979 911 SC and 928 use different regulators. Check your specific alternator part number if possible.
• OEM vs. Aftermarket: If concours restoration is your goal, stick with Bosch. For a daily driver, an aftermarket unit often works fine.
• Warranty: Pelican Parts offers returns and warranties on their parts, so buying with confidence is easy.
• Budget: Aftermarket regulators are cost-effective, but OEM parts may last longer. Read the product descriptions for any special notes.

Pelican Parts provides detailed photos and specifications for each regulator, including connector type and mounting dimensions. Use their online catalog or call their tech support if you're unsure.

Installation Tips for a 1979 Porsche Voltage Regulator

Replacing a voltage regulator is a DIY-friendly job if you have basic mechanical skills. Here are practical tips:

• Disconnect the battery before starting to avoid shorts.
• Locate the regulator: On 911 models, it's usually on the driver's side fenderwell near the battery. On 928, it may be on the alternator itself.
• Remove the old unit: Unplug the electrical connector and unscrew the mounting bolts. Note the wire routing.
• Install the new regulator: Plug in the connector, mount it securely, and reconnect the battery.
• Test the system: Start the engine and measure voltage at the battery. It should stabilize around 14V.
• If problems persist: The alternator itself may be faulty. Pelican Parts sells alternators and rebuild kits as well.

Always follow the specific instructions for your Porsche model. Pelican Parts often includes installation guides in the product listing or can be accessed from their tech articles.

Final Recommendation: Where to Buy and What to Get

For a 1979 Porsche voltage regulator, Pelican Parts is an excellent choice because they specialize in Porsche parts, offer fast shipping, and have knowledgeable staff. I recommend the following:

• For a 1979 911 SC: Choose the Bosch External Voltage Regulator (part # 0 192 052 011) for reliability and originality. If on a budget, the Standard Motor Products VR-415 is a solid alternative.
• For a 1979 928: The internal regulator for the Bosch alternator is often best as OEM (part # FR-P-001). Aftermarket options from WAI are available at lower cost.

Before buying, double-check your alternator's part number or measure the mounting style. Pelican Parts makes returns easy, but getting the right part the first time saves hassle. Your 1979 Porsche deserves a voltage regulator that keeps its electrical system stable, and Pelican Parts has the selection and expertise to help you make the right call.