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Before modifying my intake/exhaust I researched this subject quite a bit... The PCIII as well as many knockoffs from other mfgrs. is like putting a bandaid on the problem. They modify the pulse signal to the injectors and coil and "trick" the system into operating correctly. The HD super race tuner allows actual modifications to the ECU maps. The Thunder Max ECU allows more adjustment clarity (resolution/adjustment points), plus allows you to adjust many other features of the system such as rev limiter, spark intensity & timing, error code reading, logging, etc. This was my choice. I also bought the closed loop auto tune module with wide band O2 sensors. It is simply amazing! After loading a close basic map set, this unit will learn and tune as you ride. It cost a little more at about $900 or so with both units, adapter, and O2 bungs I had to have welded in, but was well worth the investment. It took my 88" TC EFI and set it loose! Amazingly fast with little or almost no popping on deceleration. I was very impressed by it!
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