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Jake Raby is widely regarded as one of the world's leading experts on the Volkswagen Type 4 engine, with more than 30 years of hands-on experience building, developing, and refining air-cooled Type 4 VW engines. Since the late 1990s, Jake has been deeply involved in Type 4 engine rebuilding, performance development, and long-term reliability testing for platforms used in VW Bus, Porsche 914, and high-performance air-cooled Volkswagen applications.
Over the decades, Jake has pushed the limits of the Type 4 air-cooled engine platform, pioneering advancements in cooling systems, cylinder head porting, plenum and intake temperature control, camshaft profiles, and custom internal components. Many of the bespoke Type 4 engine parts used in his builds were designed or commissioned specifically to solve known weaknesses and extract maximum horsepower while maintaining street-driven reliability.
What sets Jake apart in the air-cooled Volkswagen Type 4 engine world is his uncompromising work ethic and attention to detail. Every engine is built as a custom, customer-specific Type 4 VW engine, focused on longevity, drivability, and real-world performance—not shortcuts. His mission has always been the advancement of the Type 4 VW hobby, ensuring these engines remain viable, powerful, and dependable decades after their original production.
Beyond engine building, Jake has played a major role in Type 4 engine education, offering classes, technical training, and early-2000s instructional videos covering Type 4 engine teardown, inspection, and rebuild processes—resources that helped countless Volkswagen enthusiasts understand and preserve this unique engine platform.
That innovation didn't stop with Volkswagen. Jake later applied his engineering mindset to the Porsche flat-six engine world, where he helped develop the widely known intermediate shaft (IMS) bearing solution, along with numerous other reliability upgrades for Porsche engines.
This episode is packed with deep technical insight into Volkswagen Type 4 engines, air-cooled performance development, engine reliability, and decades of real-world testing. If you're passionate about VW Type 4 engines, air-cooled Volkswagens, Porsche engineering, or engine development at the highest level, this is an episode you won't want to miss.
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