Breaking 500AWHP with my Evo 5!
**Article Based on Video Transcription:**
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**Introduction**
Starting off with a beautiful drive in the Northeast during prime autumn time, we find ourselves on Route 34, traversing through areas reminiscent of Oxford and Derbyshire. The journey takes us towards New Haven, where we meet Jamie Marsh for some serious dyno work. This marks the continuation of our project that was left unfinished earlier.
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**Car Modifications and Setup**
It’s important to note the changes made to the vehicle since our last visit. We upgraded to a set of bigger injectors due to running out at 4:40 wheel on the dyno. On the street, we turned up the boost but weren’t sure exactly how much we had increased it—guessing around 34 pounds. In terms of power, my estimate was in the high 400s, but there might still be more potential left in the car. However, it’s challenging to gauge without precise street tuning, especially regarding timing.
Another significant change was switching to a stiffer wastegate. This adjustment aims to prevent any “lead off” issues that can occur when increasing boost levels with softer springs. The goal is to keep the涡轮增压器 (turbocharger) spooling smoothly at higher boost settings.
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**Dyno Testing Results**
Upon arriving at the dyno, we decided to test the vehicle at 25 pounds of boost. This was a slight reduction from our previous test where we ran at 28 pounds. The results were promising: we achieved around 480 horsepower at that lower boost level. Given this performance and the fact that the wastegate is holding up better now, there’s a strong possibility that we could surpass the 500 horsepower mark with further adjustments.
Adding two more pounds of boost already brought us to 495 horsepower, which indicates that reaching over 500 horsepower is within reach. However, the car still shows a slight power drop at higher RPMs, suggesting there’s room for fine-tuning, particularly with timing adjustments.
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**Fueling Adjustments**
With the boost where we wanted it—at around 30 pounds—we focused on dialing in the fueling. Jamie Marsh added one degree of timing to the engine, which was previously set very conservatively. This change had a noticeable effect, adding about five more horsepower at the wheels. While this wasn’t an enormous gain, it highlighted that we were likely close to the optimal timing curve.
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**Timing Tweaks**
We decided to push the timing further by adding another degree, bringing us closer to what is typically considered a safe and effective range for performance tuning. The response was consistent with expectations: a modest increase in power without any signs of detonation or other issues. This incremental approach allowed us to maximize power while maintaining reliability.
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**Driving Impressions**
The car’s power delivery has become more linear, making it not only more powerful but also more drivable. On the street, the improvements are evident, especially at higher speeds. The vehicle feels quicker and more responsive, though the differences aren’t drastic enough to be jarring or overwhelming for someone who isn’t a seasoned driver.
During our dyno sessions, we noticed that the car’s power curve remains stable up until around 3,800 RPM before it starts to taper off. This is a significant improvement compared to previous runs where the power drop was more pronounced.
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**Fueling and Performance**
The fueling adjustments have been critical in maintaining consistency at higher boost levels. The engine’s response has been impressive, with no signs of stumbling or hesitation under load. We’re confident that further tuning could push the car even closer to its theoretical maximum potential.
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**Conclusion**
While we didn’t achieve the mythical 500 horsepower mark during this session, we’re undoubtedly on the right track. The vehicle’s performance has improved in nearly every aspect, from low-end torque to high-end power delivery. As we continue to refine the tune and make necessary adjustments, there’s no doubt that even greater gains are possible.
Before wrapping up, I couldn’t resist taking a break to grab some food nearby. We stopped by a row of food trucks and decided to try out one of the local spots. For just $4, I picked up a plate of tacos and a coke—it was an incredible deal for such delicious food. It’s always nice to take a moment to enjoy the journey, whether it’s on the road or at a dyno shop.
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**Final Thoughts**
This dyno session has been incredibly informative, and we’re excited about what the future holds for this project. The car is already a marvel given its two-liter displacement, producing power levels that would be impressive even in larger engines. As we continue to refine the tune, we’re confident that we’ll unlock even more performance while maintaining the balance of drivability and reliability.
Until next time, keep an eye on our journey as we push this car—and others—to their limits.
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**Note:** This article is based entirely on the provided transcription and does not include any external information or summarization.