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Here, this is from Howell themselves.
Design Philosophy:All A/FX computers are designed using clean-sheet software. The fuel andspark maps and done using a state of the art load-type dynamometer and thebest computer programmers and automotive engineers in the business.A/FX computers have the ability to adapt to new modifications as you makethem. Add a new cam, drive at part-throttle for a few dozen miles, and thecomputer will learn the engine's revised airflow characteristics. Then, evenat W.O.T. (in open-loop mode), the fuel-air mixture will be right on.Result: maximum power, you go fast. With no loss of fuel economy ordriveability! (This feature is maximized in the race-only units)RPM limits are increased and many other annoying factory-type drawbacks areupgraded or eliminated. See actual specs for each type of computer below. Race computer specifications:- 8100 rpm redline (maximum possible!)- Totally new spark and fuel maps- Automatic speed control may be set up to 120 mph (if so equipped)- No mph cutout whatsoever- Able to use aftermarket coil and/or ignition system and not turn checkengine light on. Great for drag-race type "staging" systems.- Does not go excessively rich at top-end to "save" the catalytic converter,resulting in vastly improved maximum vehicle speed.- Significantly de-sensitized detonation sensor for use with noisy valvegear, header, etc.- calibrated for use with header and no catalytic converter. Does not readthe downstream O2 sensor, which may be disconnected w/o turning on checkengine light. May melt down a catalytic converter if used!- Best results obtained with uprated cam (Crane #16 or more), head work,larger throttle body, ported intake, etc.- Ability to use aftermarket coil and/or ignition system and not turn checkengine light on. Typical flywheel HP increase 15 - 44 HP (depending on other mods)- Warning: at the RPM this unit is capable of, you should have uprocker arms / lash adjusters (DOHC), and stiffer-than-stock valve springs toprevent valve float and resultant damage!- Requires 93 octane fuel (at altitudes up to 4,000 ft.) or octane booster.More octane required with compression increase.- Very wide ability to adapt to modifications as you make them. These computers take 4 to 6 weeks to program and are for the 97 cars only.
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