1989 Nissan 240SX SR20DET - Power Pages
Text By Richard Fong, Photography by Richard Fong
| 2000 to 3500 HP range: -4 to 3 | 2000 to 3500 TQ range: -8 to 6 |
| 3500 to 5500 HP range: 0 to 15 | 3500 to 5500 TQ range: 3 to 20 |
| 5500 to red line HP range: 9 to 26 | 5500 to red line TQ range: 12 to 20 |
| Peak HP 187.8 | Peak TQ 182.1 |
Dyno 4
Splitfire Super Direct Ignition System189.1 HP 183.8 TQ
Pros
Splitfire has come up with a platform-specific, plug-and-play coil-on-plug ignition system. Currently available only for the SR20DET and Mazda Miata, the ignition system maintained voltage across the rpm range and was able generate 1.3 hp and 1.7 lb-ft of torque at the peak. We realized as much as 6 hp and 2 lb-ft of torque at 4000 rpm. The ignition really smoothed out the curve, taking out a number of undulations that occurred from 3500 rpm through red line.
Cons
Since there are few platforms available, only those lucky owners will really be able to take advantage of the system. Also, it's a little pricy.
Notes
Installation was a snap. The dyno graphs show where the stock ignition fell short on voltage. The instructions mention that you should switch to cooler plugs when upgrading power adders. Thankfully, all of the directions are in English.
Parts
Four coil packs, ignition wires, ignition box and instructions
Tools
Ratchet, 10mm socket, 6-inch extension and 4mm hex wrench
Installation Time
20 minutes
Temperature
Air temperature at 71.6 degrees FahrenheitTemperature difference from previous run: +0.1 degree Fahrenheit
Conclusion
This concludes Part One of our S13 power page. You can bet the next stages will be just as rewarding. With our first three components already contributing 25.6 hp and 18 lb-ft of torque, we're beginning to see the performance potential of the SR20DET engine. Stay tuned, this buildup isn't over yet!
Tune It.
Power is everything
By Richard Fong
Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!