Think of your 5.9 Cummins as a sleeping giant. It’s got potential, but it needs the right tool to wake it up. That’s where a tuner comes in. A good tuner can improve horsepower, torque, and even fuel economy. I’ve been messing with diesel trucks for years, and finding the right tuner can be a game-changer. This article will walk you through some of the best options on the market right now.
Product Overview / Quick Summary:
- Edge Products Juice with Attitude CTS3: User-friendly, lots of monitoring options.
- Smarty S67 Tuner: Known for clean, reliable power gains.
- Bully Dog 40420 BDX Tuner: Great for towing and daily driving.
- EFI Live Autocal: Customizable tuning for advanced users.
- DiabloSport Predator 2: Easy to install, pre-loaded tunes for quick gains.
Top 5 Best Tuners for 5.9 Cummins
1. Edge Products Juice with Attitude CTS3
The Edge Juice with Attitude CTS3 isn’t just a tuner; it’s a complete monitoring system. It gives you real-time data on everything from EGTs to boost pressure. The color touchscreen is easy to read, and the interface is very intuitive.
Pros:
- ✅ Large, clear touchscreen display
- ✅ Comprehensive monitoring capabilities
- ✅ Multiple power levels for different driving situations
Cons:
- ❌ Can be a bit pricey compared to other options
- ❌ Some users report occasional software glitches
- ❌ Requires some wiring for full functionality
Verdict: If you want a tuner that also provides extensive monitoring and a user-friendly interface, the Edge Juice with Attitude CTS3 is a solid choice. It’s great for those who want to keep a close eye on their engine’s performance.
2. Smarty S67 Tuner
The Smarty S67 is known for its clean and reliable power gains. It focuses on optimizing the engine’s performance without adding excessive smoke or unnecessary features. It’s a straightforward tuner designed for performance.
Pros:
- ✅ Simple and easy to use
- ✅ Provides noticeable power and torque increases
- ✅ Reputable brand with a long history in diesel tuning
Cons:
- ❌ Lacks the advanced monitoring features of some other tuners
- ❌ The display is basic compared to touchscreen models
- ❌ Limited adjustability compared to custom tuning solutions
Verdict: The Smarty S67 is an excellent option if you’re looking for a no-nonsense tuner that delivers reliable power gains. It’s ideal for those who prioritize performance over fancy features.
3. Bully Dog 40420 BDX Tuner
The Bully Dog BDX is a versatile tuner that’s great for both towing and daily driving. It comes with pre-loaded tunes designed to optimize fuel economy and performance. The BDX also allows for custom tuning if you want to fine-tune your engine’s parameters.
Pros:
- ✅ Pre-loaded tunes for various driving needs
- ✅ Customizable tuning options for advanced users
- ✅ Compact and easy to install
Cons:
- ❌ The screen can be difficult to read in direct sunlight
- ❌ Custom tuning requires additional software and knowledge
- ❌ Some users have reported issues with the initial setup process
Verdict: If you need a tuner that can handle both towing and daily driving, the Bully Dog BDX is a great option. It offers a good balance of pre-loaded tunes and customizable options.
4. EFI Live Autocal
EFI Live Autocal isn’t your typical plug-and-play tuner. It’s a custom tuning solution that requires a bit more technical knowledge. But the payoff is worth it. You can fine-tune virtually every aspect of your engine’s performance with EFI Live.
Pros:
- ✅ Unmatched customization options
- ✅ Allows for precise control over engine parameters
- ✅ Can be used to diagnose and troubleshoot engine issues
Cons:
- ❌ Requires a good understanding of engine tuning principles
- ❌ Can be expensive compared to pre-loaded tuners
- ❌ Steeper learning curve
Verdict: EFI Live Autocal is the go-to choice for experienced users who want complete control over their engine’s performance. It’s not for beginners, but the level of customization is unmatched.
5. DiabloSport Predator 2
The DiabloSport Predator 2 is designed for easy installation and quick performance gains. It comes with pre-loaded tunes that can be installed in minutes. The Predator 2 is a great option for those who want a simple and effective tuning solution.
Pros:
- ✅ Easy to install and use
- ✅ Pre-loaded tunes for instant performance gains
- ✅ Affordable price point
Cons:
- ❌ Limited customization options
- ❌ The screen is small and basic
- ❌ Not as powerful as some of the more advanced tuners
Verdict: If you’re looking for a budget-friendly tuner that’s easy to install and delivers noticeable performance gains, the DiabloSport Predator 2 is a solid choice. It’s perfect for those who want a quick and simple upgrade.
Buying Guide
Choosing the right tuner for your 5.9 Cummins can feel overwhelming. Here’s a breakdown to help you make the best decision:
- Your Goals: What do you want to achieve? More power for towing? Better fuel economy for daily driving? Or are you looking for all-out performance? Define your goals before you start shopping.
- Ease of Use: Are you comfortable with technology? Some tuners are plug-and-play, while others require more technical knowledge. Choose a tuner that matches your skill level.
- Monitoring Features: Do you want to monitor your engine’s performance? Some tuners offer real-time data on things like EGTs, boost pressure, and fuel economy. This can be helpful for diagnosing problems and optimizing performance.
- Custom Tuning: Do you want the ability to customize your engine’s parameters? If so, look for a tuner that supports custom tuning. Keep in mind that custom tuning requires additional software and knowledge.
- Budget: Tuners range in price from a few hundred dollars to over a thousand. Set a budget before you start shopping and stick to it.
- Research and Reviews: Before you buy any tuner, do your research. Read reviews from other users and see what they have to say. This can help you avoid potential problems and choose a tuner that’s right for you.
- Consider Future Upgrades: Are you planning any other upgrades to your 5.9 Cummins? If so, choose a tuner that can accommodate those upgrades. For example, if you’re planning to install larger injectors, you’ll need a tuner that can adjust the fuel settings accordingly.
FAQs
Q: Will a tuner void my warranty?
A: Yes, installing a tuner can void your factory warranty. It’s always a good idea to check with your dealer before installing any aftermarket performance parts.
Q: How much horsepower can I gain with a tuner?
A: Horsepower gains vary depending on the tuner and the settings you use. However, you can typically expect to see gains of 50-150 horsepower with a good tuner.
Q: Can a tuner improve my fuel economy?
A: Yes, a tuner can improve your fuel economy, especially if you’re driving conservatively. Many tuners have fuel economy-specific tunes that can help you save money at the pump.
Q: Are tuners easy to install?
A: Some tuners are very easy to install, while others require more technical knowledge. Plug-and-play tuners are typically the easiest to install, while custom tuning solutions require more expertise.
Q: What are EGTs?
A: EGTs stand for Exhaust Gas Temperatures. They’re a measure of the temperature of the exhaust gases coming out of your engine. High EGTs can damage your engine, so it’s important to monitor them when tuning your diesel.
Conclusion
Choosing the best tuner for your 5.9 Cummins really comes down to what you want to achieve. Do you want simple power gains? Or do you need something with advanced monitoring and customization? Hopefully, this guide has given you a good starting point. Happy tuning!
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