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"Piggy Back" Controllers in PGT
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Major clarification in 10.2.C.12
"Errors and omissions"
It is the decision of Rally-America that "piggy back" type ECM controllers may be used to alter the function of the stock ECM in otherwise legal PGT vehicles.
The vehicle's stock, original equipment wiring harness and ECM must be retained, but the harness may be modified only to enable the connection of the "piggy back" controller.
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10.2.C.12 Induction
The carburetor(s) or fuel injection normally mounted on the
recognized model may not be changed or removed. The elements
that control the quantity of fuel fed into the engine may be
changed. The standard factory ECU shall be retained, but may be
reprogrammed. The vehicle shall be capable of running if a
standard ECU was reinstalled. No alteration of the wire loom is
allowed, except for the purposes of connecting a "Piggy Back"
engine controller. The components that control the quantity of air in the
engine shall not be changed or altered in any manner except for
the addition of a restrictor if required. The original air filter (OEM
specification) and air filter housing may not be modified, however
the components upstream of the housing may be moved, modified
or removed. Boost on supercharged or turbocharged vehicles is
unrestricted and a manual boost control and associated hardware
is authorized. The "piggy back" controller may be used to alter the function
of the ECU, to similar effect as reprogramming the O.E. ECU.
--------------------------
Reason for Change: "Piggy Back" controllers and some wiring modifications were allowed in 2004. The previous 2005 R-A 10.2C.12 would have harshly affected those who had prepped their cars to 2004 rules, especially pre-OBDII vehicles.
Official notice to follow.
__________________
--------------------------------------------------------------------------------
Major clarification in 10.2.C.12
"Errors and omissions"
It is the decision of Rally-America that "piggy back" type ECM controllers may be used to alter the function of the stock ECM in otherwise legal PGT vehicles.
The vehicle's stock, original equipment wiring harness and ECM must be retained, but the harness may be modified only to enable the connection of the "piggy back" controller.
---------------------
10.2.C.12 Induction
The carburetor(s) or fuel injection normally mounted on the
recognized model may not be changed or removed. The elements
that control the quantity of fuel fed into the engine may be
changed. The standard factory ECU shall be retained, but may be
reprogrammed. The vehicle shall be capable of running if a
standard ECU was reinstalled. No alteration of the wire loom is
allowed, except for the purposes of connecting a "Piggy Back"
engine controller. The components that control the quantity of air in the
engine shall not be changed or altered in any manner except for
the addition of a restrictor if required. The original air filter (OEM
specification) and air filter housing may not be modified, however
the components upstream of the housing may be moved, modified
or removed. Boost on supercharged or turbocharged vehicles is
unrestricted and a manual boost control and associated hardware
is authorized. The "piggy back" controller may be used to alter the function
of the ECU, to similar effect as reprogramming the O.E. ECU.
--------------------------
Reason for Change: "Piggy Back" controllers and some wiring modifications were allowed in 2004. The previous 2005 R-A 10.2C.12 would have harshly affected those who had prepped their cars to 2004 rules, especially pre-OBDII vehicles.
Official notice to follow.
__________________