Postby smokey1275 » January 3rd, 2008, 12:21 pm
in my opinion , pb's donot make sense on standard engines as they can only do so much over standard components . Their are no alterations in the physical dimensions or rather the amount of air and fuel being injected into and out of the motor. These systems work on varying the signal voltage back to the engine operating ecm. If you are trying to extract more out of a motor , in any application you will at first have to have good working knowledge of the systems under your hood and at what length it would be best to upgrade components as necessary.A apex'i system is nothing much more than a variable resistor of a different value that will communicate a different (and peripheral) voltage for the computer to use to compensate for an airfuel ratio at a certain rpm.