2009 Lexus IS F - Power Pages

Cons
Removal of the factory exhaust requires plenty of time and patience. Ask for assistance when installing the new exhaust to help speed up the process.

Parts
Exhaust, mid-pipe, mounting hardware, stickers

Tools
10-, 12-, 14- and 17mm sockets, 10-, 12-, 14- and 17mm open-end wrenches, ratchet, extension, crescent wrench, WD-40

Installation Time
70 minutes

Notes
With our new exhaust in place, the IS F achieved an increase in both power and torque throughout the entire power band, with a peak gain of 8.6 hp and 13.1 lb-ft of torque over our previous run. The dyno charts revealed an increase of 10 hp and 16 lb-ft of torque at 2,800 rpm, with our largest improvement of 18 hp and 23 lb-ft of torque taking place at 4,400 rpm.

Pros
Nitrous Oxide delivers the best bang for the buck by allowing the engine to burn more fuel and air, resulting in a more powerful combustion, thus creating power. Due to the limited aftermarket selection of parts for the IS F, the idea of using Nitrous Oxide became a compelling option to increase its power output to compete with the more expensive high-end sports cars with the simple push of a button.

Cons
Properly tuning a Nitrous Oxide system requires knowledge of properly calculating and installing the correct jets for both the fuel and nitrous. Installing a jet that's oversized in fuel and too small in nitrous can cause stumbling, while the opposite will result in lean air/fuel ratios that can destroy an engine.

Parts
Wet NOS nitrous system, composite bottle, quick-release brackets, Ntimidator purge kit, P.O.D. system (heater blanket, bottle opener, pressure sensor), jets

Tools
7/8 , 9/16 , 1/2 and 5/8 -inch sockets, 7/16 , 7/8 , 1/2 and 5/8 -inch open-end wrenches, ratchet, extension, crescent wrench, connectors, wires, electrical tape, zip ties, Teflon paste

Install Time
One full day

Notes
Working alongside Eric Cheney of iMPULSE Engineering, we began experimenting with multiple jet combinations for our single-fogger NOS system to achieve the proper mixtures, while maintaining a safe A/F ratio. After plowing through more than 40 jets, we finally found a working combination that resulted in a peak gain of 155.9 hp and 225.0 lb-ft of torque over our previous run. At 3,500 rpm, the dyno charts revealed the IS F roaring to life with a pick-up of 160 hp and 243 lb-ft of torque. The power gains were impressive from 4,000 rpm to redline, as we witnessed triple-digit gains throughout the entire run.

Conclusion
Our once mild-mannered IS F is now delivering an impressive 510.7 hp and 552.8 lb-ft of torque to the wheels-a mind-blowing gain of 180 hp and 260 lb-ft of torque over our baseline run, and the largest we've ever recorded in Power Pages history. With further tuning and a more aggressive jetting, we hope to take this V-8 well into the 600 whp range. Porsche Carrera GTs, beware!

By Scott Tsuneishi

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