92 X 82 Piston & Cylinder Kit, Thick Wall

OVERVIEW

Upgrade your air-cooled powerplant with the ultimate blend of displacement and durability. The AA Pistons 92mm x 82mm Thick Wall Piston and Cylinder Kit is specifically engineered to solve the historical Achilles'' heel of the 92mm bore. In the past, standard 92mm cylinders were notorious for having thin walls that were prone to warping and overheating under heavy loads. This "Thick Wall" kit revolutionizes that design by utilizing the same outer diameter as a 94mm cylinder while maintaining a 92mm internal bore. This results in a massive increase in structural integrity and heat dissipation capabilities, making it the perfect choice for high-performance street builds, heavy campers, or rugged off-road machines where reliability is just as important as horsepower.

When paired with an 82mm stroker crankshaft, this kit transforms your standard engine into a 2180cc powerhouse. Because these cylinders use the larger 94mm seating surface, you get a much larger "footprint" on the engine case and cylinder heads, which significantly reduces the risk of head leaks and pulled studs. This kit is designed for long-stroke applications, meaning the wrist pin height is optimized for the 82mm throw, ensuring your geometry remains correct without excessive shimming. Whether you are building a torque-heavy daily driver or a weekend warrior, this kit provides the cooling surface area of a 94mm setup with the added "meat" of the 92mm iron walls, giving you an engine that stays round and seals tight for thousands of miles.

FITMENT

• Volkswagen Type 1: Beetle, Karmann Ghia (Requires 94mm Case & Head Machining)
• Volkswagen Type 2: Bus, Transporter, Kombi through 1971 (Requires 94mm Case & Head Machining)
• Volkswagen Type 3: Fastback, Squareback, Notchback (Requires 94mm Case & Head Machining)
• Volkswagen Thing: All Years (Requires 94mm Case & Head Machining)
• Sand Rails & Dune Buggies: All custom applications utilizing Type 1 upright engine configurations

SPECS

• Piston Diameter: 92mm
• Stroke Compatibility: 82mm (Stroker Pin Height)
• Cylinder Type: Thick Wall Design (Uses 94mm machine bore)
• Total Displacement: 2180cc (with 82mm Crankshaft)
• Case Bore Required: 97.2mm (Standard 94mm Bore Size)
• Head Bore Required: 101.1mm (Standard 94mm Bore Size)
• Piston Material: Hypereutectic Cast Aluminum Alloy
• Cylinder Material: High-Grade Cast Iron
• Kit Includes: 4 Pistons, 4 Cylinders, Complete Ring Set, Wrist Pins, and Spiro-lock Retainers
• Compression Height: Designed for stroker applications to minimize deck height shimming

PRO TIPS

1. Verify Your Machining Specs: When taking your engine case and cylinder heads to the machine shop, it is vital to specify that you are using 94mm "Thick Wall" 92s. A common mistake is for a machinist to bore the case for standard 92mm cylinders, which are smaller. These cylinders require the exact same 97.2mm case bore and 101.1mm head bore as a 94mm kit. Double-check these clearances before assembly to ensure a snug, leak-free fit that properly centers the cylinder on the cylinder stud pattern.

2. Critical Deck Height Measurement: With a 2180cc stroker build, your deck height is the most important measurement for engine longevity and pump-gas compatibility. Aim for a deck height between .040'' and .060''. Because these are stroker pistons, they are designed to sit deeper in the cylinder to compensate for the longer throw of the 82mm crank, but you must still mock up all four corners. Use high-quality copper or steel base shims to achieve your desired compression ratio and ensure you don''t have piston-to-head contact at high RPMs.

3. Proper Ring Gapping and Break-In: Never install pistons straight out of the box without checking the ring end gap. Use a feeler gauge to ensure the top and second rings have adequate expansion room; typically, .014'' to .016'' is a safe baseline for a high-performance street engine. During the initial startup, use a high-zinc (ZDDP) break-in oil and avoid idling for long periods. Run the engine between 2000-2500 RPM for the first 20 minutes to properly splash-lubricate the camshaft and seat the rings against the new cylinder walls.