F. The engine management system parameters and operation may be
modifi ed only via the methods listed below. Any and all modifi cations
must meet or exceed the applicable EPA tailpipe emissions stan14.
STREET TOURING CATEGORY — 87
dards for the year, make, and model of the car. These allowances
also apply to forced induction cars, except that no changes to standard
boost levels, intercoolers, or boost controls are permitted. Boost
changes indirectly resulting from allowed modifi cations are permissible,
but directly altering or modifying the boost or turbo controls,
either mechanically or electronically, is strictly prohibited.
1. Reprogrammed ECU (via hardware and/or software) may be used
in the standard housing. Traction control parameters may not be
altered. Altered engine controllers may not alter boost levels in
forced induction engines. Alternate software maps which violate
these restrictions may not be present during competition, regardless
of activation.
2. Electronic components may be installed in-line between an engine’s
sensors and ECU. These components may alter the signal
coming from the sensor in order to affect the ECU’s operation of
engine management system. Example: fuel controllers that modify
the signal coming from an airfl ow sensor.
3. Fuel pressure regulators may be replaced in lieu of electronic alterations
to the fuel system. It is not permitted to electronically
modify the fuel system AND replace a fuel pressure regulator.
4. Ignition timing may be set at any point on factory adjustable distributor
ignition systems.
5. VTEC controllers and other devices may be used which alter the
timing of factory standard electronic variable valve timing systems.
6. All vehicles must comply with the EPA tailpipe emissions test requirements
as a minimum.