Best Engine Upgrades for a Datsun 240Z: L28 Mikuni Setup

TL;DR – Top Engine Upgrades for the 240Z

• The L28 is a proven upgrade for both drivability and power in classic 240Zs.

• Mikuni 40s bring old-school throttle response and JDM tuning flair.

• Supporting mods like fuel delivery, ignition, and exhaust make the setup sing.

Why the L28 Swap Remains the Gold Standard

When it comes to upgrading a Datsun 240Z, the L28 inline-six is often the first stop—and for good reason. It's a natural evolution from the factory L24, offering more displacement, a stronger bottom end, and excellent parts availability. For builders who want to stay in the Nissan family while chasing real gains, the L28 is the sweet spot between classic character and usable performance.

Take Rami Aryan’s Restored 1970 Datsun 240Z Series 1 with L28 & Mikuni Build. His setup showcases how well an L28 can transform a stock Z into a rolling statement of power and style.

Mikuni Carbs: Mechanical Soul, Tuned Precision

Where the L28 brings displacement, the Mikuni 40s bring flavor. These triple side-draft carbs are legendary in vintage JDM circles, known for their responsiveness and their role in motorsport heritage. Sourced and tuned through Kyusha House, Rami’s setup proves how much character these carbs add to the driving experience.

• Instant throttle response

• Tuning flexibility

• That unmistakable carbureted induction sound

Looking for inspiration? Check out this modified 1971 Datsun 240Z with triple Weber carbs for another classic approach.

Supporting Mods That Make It Work

No performance setup is complete without the right supporting cast. To keep the L28 and Mikuni combo running smoothly, you’ll want upgrades like:

• Nismo Fuel Pump – to maintain consistent flow under load

• Kameari Distributor & Alternator Kit – for reliable ignition and charging

• Custom 3” Exhaust – like the one used in Rami’s build by Mancini Motorsports, built for tone and flow

• Close-Ratio 5-Speed Gearbox – for tighter power bands and more fun through the gears

• R200 LSD Rear End – to handle the added torque and improve corner exit

You’ll find similar setups in cars like Tyler Probst’s 1972 Datsun 240Z and Roy Rolon’s 1972 Z build, which prove just how potent these combos can be.

Why It’s Still Relevant Today

In a world of LS swaps and modern ECUs, you might wonder why anyone sticks with vintage carbs. The answer? Character.

L28 + Mikuni setups offer:

• Analog feel and driver engagement

• Tuning as an art form, not just software

• Authenticity for collectors and JDM purists

If you're passionate about the roots of JDM car culture, this kind of setup speaks louder than dyno charts.

Further Articles You May Like

• Custom 1970 Datsun 240Z Series 1 L28 Mikuni Build Guide

• Widebody 1970 Datsun 240Z Build: G-Nose Ztrix Styling

• Using Classic Cars to Showcase Brand Identity and Products

• How the 240Z Helped Define JDM Car Culture in America

• Restored 1970 Datsun 240Z Series 1 with L28 & Mikuni Build

Author Bio
Paul Doherty is the founder and editor of Stance Auto Magazine, passionate about connecting drivers with their perfect cars. From car reviews to deep dives into automotive news, Paul leads a team dedicated to bringing the culture of stance and community builds to a global audience.

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