Man uses ChatGPT to tune his car and it works wonders

ChatGPT stepped into the world of car tuning when a BMW 335i owner asked the AI tool to write a performance map for his car.

The sedan had already been fitted with an intake, charge pipe, and downpipes but still ran on a factory tune.

After several rounds of transmission repairs, the owner decided to see if AI tuning could make a difference.

What followed was a test that revealed both the potential and the risks of letting artificial intelligence handle performance upgrades.

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What happened when ChatGPT tuned a car

The experiment was shared in a video posted by Wyatt Webster on YouTube, where he tested whether ChatGPT could meaningfully improve a BMW 335i.

Before attempting the tune, ChatGPT suggested weight reduction.

The advice was simple: remove the rear seats, doors, and hood to lighten the car.

Stripping out over 430 pounds gave the BMW 335i a quicker 0–60 mph time, dropping from 6.2 seconds to 5.8.

It showed that even basic guidance from the AI could make a difference on the road.

When asked to create a custom tune through MHD software, ChatGPT produced a file designed for 93 octane fuel with modest increases in boost.

The owner flashed the file to the ECU, and the car ran without issue. In testing, acceleration improved noticeably, cutting nearly a second from the stock baseline.

This confirmed that AI tuning was not only possible but also effective in practice.

The next step was a more aggressive ‘spicy’ tune.

This file raised boost to nearly 19 psi and transformed the car’s character.

The 335i spun its tires through the first two gears but still managed to reach 60 mph in 5.1 seconds.

Considering the car had over 240,000 miles, the gains were significant.

The test highlighted how far AI tuning could go in pushing performance without additional hardware.

AI tuning raises new questions

The project showed how AI tuning can generate usable results in minutes.

Traditional tuners often take longer to deliver files, while ChatGPT created a working solution almost instantly.

For enthusiasts working with tight budgets, that speed and accessibility could be attractive.

There are, however, clear risks.

Poorly calibrated tunes can damage engines and drivetrains, and AI lacks the detailed oversight that experienced tuners provide.

In this case, the BMW 335i held together through testing, but long-term effects remain unknown.

Still, the test proved that artificial intelligence can play an active role in car tuning.

The experiment confirmed that ChatGPT could make measurable improvements to a BMW 335i.

While it is not a replacement for professional expertise, the results suggest that AI tuning could become part of the modification landscape, reshaping how enthusiasts think about car tuning and performance in the future.

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