Oil Pressure Boost Kit, Fits Single & Relief Cases

Elevate Your Engine''s Vitality with the EMPI Oil Pressure Boost Kit

In the world of air-cooled Volkswagens, oil is not just a lubricant; it is the lifeblood and the primary cooling agent for your internal components. The EMPI Oil Pressure Boost Kit is an essential upgrade for any enthusiast looking to safeguard their engine against the rigors of high-performance driving or extreme environmental conditions. By replacing the factory-standard relief springs with precision-engineered, high-tension alternatives, this kit effectively increases the entire range of your oil system''s working pressure. This is particularly critical for engines that have been modified for higher horsepower or those equipped with external oil cooling systems where the added length of hoses and the restriction of a remote cooler can lead to a dangerous drop in localized oil pressure. When you are pushing your flat-four to the limit, ensuring that every journal and bearing receives a consistent, high-pressure flow of oil is the difference between a long-lasting build and a catastrophic failure.

The versatility of the EMPI 00-9201-0 kit makes it a staple in any VW engine builder''s arsenal. Designed to be compatible with both early-style single relief cases and later dual relief cases, this kit provides a universal solution for the Type 1, Type 2, and Type 3 engine platforms. For owners of vintage machines, the added pressure helps compensate for the natural tolerances found in high-mileage blocks, while for the modern performance builder, it provides the "extra edge" needed to maintain oil film strength at high RPMs. Whether you are navigating a desert trail in a custom woods buggy or cruising the coastline in a restored Karmann Ghia, this kit ensures that your lubrication system is operating at peak efficiency. It is a small investment that offers massive peace of mind, protecting your precision-machined crankshaft, cam, and lifters from premature wear and overheating.

Vehicle Fitment and Compatibility

This kit is designed for all VW air-cooled Type 1 based engines, including but not limited to:

• VW Beetle/Bug: All years (1950-1979)
• VW Super Beetle: All years (1971-1979)
• VW Karmann Ghia: All years (1956-1974)
• VW Bus/Transporter (Type 2): 1200cc, 1300cc, 1500cc, and 1600cc models (1950-1971)
• VW Type 3 (Squareback, Fastback, Notchback): All years (1961-1973)
• VW Thing (Type 181): All years (1973-1974)
• Custom Applications: Ideal for Sand Rails, Dune Buggies, and Trikes using VW cases.

Technical Specifications and Materials

• Product Part Number: 00-9201-0
• Manufacturer: EMPI
• Spring Material: High-tensile chrome-silicon spring steel for heat resistance and tension retention.
• Piston Material: Precision-ground steel slugs designed for smooth travel within the engine case relief bore.
• Kit Contents: Two (2) heavy-duty pressure springs and two (2) relief pistons.
• Pressure Increase: Designed to increase operating pressure across the entire RPM range by approximately 15-20% depending on engine condition.
• Case Compatibility: Engineered for both Single Relief (early) and Dual Relief (late) VW engine cases.

Pro Tips from the Appletree Tech Bench

1. Proper Application for Single Relief Cases

It is vital to remember that if you are working on an early "Single Relief" engine case, you will only use one spring and one piston from this kit. The dual relief cases (found on most 1600cc engines from 1971 onwards) utilize both sets to manage both the oil cooler bypass and the main system pressure. Never attempt to "double up" or force extra components into a single relief bore, as this will result in oil filter failure or internal seal blowouts due to excessive pressure spikes during cold starts.

2. Inspect the Relief Bore for Smooth Operation

Before installing your new EMPI boost kit, take the time to inspect the relief valve bores in your engine case. Use a telescoping magnet to remove the old pistons and check for any scoring or "steps" on the bore walls. If the new pistons do not slide in and out freely by gravity or with very light pressure, the bore may need to be lightly honed with a fine-grit scotch-brite pad on a dowel. A sticking piston can lead to erratic oil pressure, either causing it to stay too low or spike high enough to burst your oil cooler.

3. The External Cooler Necessity

If you have recently installed a front-mounted oil cooler or a "doghouse" bypass system on your dune buggy or bus, this kit is no longer optionalit is a necessity. The added plumbing of an external system creates significant flow resistance. The stiffer springs in this boost kit counteract that resistance, ensuring that despite the long path the oil must travel, the pressure at the actual engine bearings remains within the optimal factory-plus specification. Always pair this kit with a high-quality oil pressure gauge to monitor your results in real-time.