Alternator, 75 Amp, for Aircooled VW

OVERVIEW

Upgrade your vintage Volkswagen''s charging system with the high-output performance of our IAP 75 Amp Alternator. Designed specifically for the air-cooled enthusiast who demands more than the stock 51-amp or 55-amp units can provide, this 12-volt powerhouse ensures your electrical system remains stable even under heavy loads. Whether you are running high-intensity LED lighting, a modern high-fidelity sound system, or auxiliary cooling fans for your performance engine, this 75-amp alternator provides the extra overhead necessary to keep your battery topped off and your ignition spark hot. This unit features a built-in internal regulator, which simplifies your engine bay wiring by eliminating the need for an external regulator box, resulting in a cleaner look and fewer failure points in your charging circuit.

Engineered for durability and ease of installation, this AL82N75 model is a direct replacement for standard Bosch-style alternators found on Type 1 engines. The robust cast aluminum housing dissipates heat efficiently, extending the life of the internal diodes and windings during long summer cruises or high-RPM desert runs in a sand rail. At Appletree Automotive, we understand that reliability is everything when you are miles away from home; that is why this alternator is built to withstand the vibration and heat cycles inherent to the air-cooled VW environment. It utilizes a simple two-wire hookupone for your main battery power and one for your dash warning lightmaking it an ideal choice for both professional engine builders and weekend garage warriors looking to modernize their Beetle, Ghia, or custom buggy.

FITMENT

• Volkswagen Beetle: 1967-1977 (Sedan & Convertible)
• Volkswagen Super Beetle: 1971-1979
• Volkswagen Karmann Ghia: 1967-1974
• Volkswagen Bus / Type 2: 1967-1971 (With Type 1 Upright Engine)
• Volkswagen Thing / Type 181: 1973-1974
• Custom Applications: Dune Buggies, Sand Rails, and Trikes utilizing 1200cc to 1600cc+ Type 1 upright engines.
• Note: Requires an alternator-specific stand and 3-piece backing plate set if converting from a generator.

SPECS

• Amperage Output: 75 Amps (High Output)
• Voltage: 12 Volts
• Regulator Type: Internal (Built-in)
• Housing Material: Heavy-duty Cast Aluminum
• Wiring Configuration: 2-Wire Hookup (B+ and D+)
• Weight: 11.56 lbs
• Finish: Natural Aluminum
• Rotation: Clockwise
• Part Number Reference: AL82N75 / 00-9448-7
• GTIN: 756632209358

PRO TIPS

1. Verify Pulley Alignment and Belt Tension

When installing your new 75-amp alternator, it is absolutely critical to ensure that your crank pulley and alternator pulley are perfectly aligned. If the alternator is sitting too far forward or backward on the stand, the belt will wear prematurely and put unnecessary side-load on the alternator bearings, leading to early failure. Use shims behind the pulley halves to achieve the correct belt tension; you should have about 1/2 inch of deflection when pressing firmly on the belt. Don''t over-tighten, as a "guitar-string" tight belt will ruin the front bearing of your new high-output unit in short order.

2. Upgrade Your Charging Wire Gauge

Since you are moving up to a 75-amp output, the stock 10-gauge or 12-gauge "B+" wire that runs from the alternator to the starter (or battery) might become a bottleneck or even a fire hazard under full load. To truly see the benefits of the increased amperage, we recommend upgrading that primary charging wire to at least an 8-gauge or 6-gauge multi-strand copper wire. Also, ensure your engine-to-chassis ground strap and battery-to-chassis ground are clean and tight. A high-output alternator can only perform as well as the circuit it is feeding.

3. Conversion Requirements from Generator to Alternator

If you are converting an older 12-volt engine from a generator to this 75-amp alternator, remember that it is not a "drop-in" swap for the hardware. You must purchase an alternator-specific mounting stand, as the diameter of the alternator body is larger than the old generator. Additionally, you will need the specific 3-piece alternator backing plate tinware to ensure proper cooling airflow is directed through the fan shroud. Finally, because the regulator is internal, you must bypass your old fender-well mounted regulator by connecting the wires together so the dash "Gen/Alt" light functions correctly and the battery receives the charge.