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Nissan’s Nismo heritage program, dedicated to the preservation and restoration of classic Nissan vehicles, is showcasing its commitment by releasing an advanced cylinder head for the vintage L-series engine. This innovation arrives over forty years since the last L-series-equipped Z car rolled off the production line, emphasizing Nissan’s remarkable dedication to its historic fleet.
At the Nismo Nostalgic 2Days 2024 event, an exhibit car featured the newly designed cylinder head which resulted from several years of development, coinciding with Nismo’s 40th anniversary, as mentioned on NissanZClub.com. The enhancement reconfigures the L-series inline-six engine, found in models from the 1969 240Z through to the 1983 280ZX, by implementing dual overhead camshafts and thus rebranding the powerplant as the TLX—a presumed acronym for Twin-cam L-series Experimental.
The modified power unit is likely derived from the L26 or L28 engines from the respective 260Z or 280Z models, with its bore expanded to 89 mm which increases displacement to 2.9 liters. A significant increase in compression ratio to 12.5:1 and a higher redline of 7,500 rpm are notable attributes. The engine’s power output is reported to surpass 300 horsepower, with torque reaching around 217 pound-feet—substantial improvements from the 132 hp and 144 lb-ft specifications of the 1980 280ZX without forced induction.
Considering the uniqueness and complexity of an all-new cylinder head for a historic car model, one can expect it to carry a high price tag, seemingly targeting affluent classic car racers. However, Nissan communicated to us that there are no current intentions to commercialize this twin-cam cylinder head. This stance could change with enough financial incentive, but for now, enthusiasts also have the option of turning to the aftermarket and utilizing Honda’s K-series architecture.
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FAQs about Nissan’s 240Z Engine Head Upgrade
What is the L-series engine used in?
The L-series engine was used in Datsun/Nissan vehicles, including the iconic 240Z through to the 280ZX ranging from 1969 to 1983.
What changes were made to the original L-series engine?
Nissan upgraded the L-series engine, transforming it from a single overhead camshaft design to a dual overhead camshaft configuration, thereby increasing displacement, power output, and torque.
What is the new designation for the upgraded engine?
The new engine, which features the upgraded twin-cam cylinder head, has been referred to as the TLX, indicating a twin-cam experiment on the L-series engine.
Will Nissan sell this new cylinder head to the public?
As of now, Nissan has no official plans to sell the newly developed cylinder head. However, the company might reconsider depending on the demand and financial viability.
Conclusion
Nissan’s commitment to their classic car enthusiasts shines through with the development of the upgraded cylinder head for the 240Z’s L-series engine, a move that nods respectfully to the past while pushing the boundaries of performance. While this product may be earmarked for an exclusive market due to its bespoke nature and potential cost, it stands as a testament to the enduring legacy of the Nissan Z series and the brand’s continued support for its heritage models.
