Atom, Monsoon, Storm, Xtreme and Fury ECUs injection drivers are only capable of directly driving high impedance injectors. When driving low impedance injectors, ballast resisters MUST be installed. Note that most vehicles factory fitted with low impedance injectors will have factory fitted ballast resistors.

 

Wiring Ballast Resistors

Atom, Monsoon, Storm, Xtreme and Fury ECUs can drive up to 2 low impedance injectors on one Injection Drive WITH BALLAST RESISTORS FITTED. Ballast resistors must be used to limit the current through the injectors and injector drive to avoid damage.

 

It is recommended to wire a single injector to each injector drive. On engines with more than eight cylinders injectors must be paired.

Injector wiring for injectors with ballast resistors

Ballast Resistor Selection

 

If the injector impedance is LESS THAN 2 Ohms, use 2R2 (2.2 Ohm) ballast.

If the injector impedance is between 2 and 6 Ohms, use 4R7 (4.7 Ohm) ballast.

If the injector impedance is greater than 6 Ohms, use no ballast.

 

It should be noted that injector ballast resistors get quite hot at high injector duty cycles. Therefore these should be mounted on a heat sink and this should be bolted to the chassis. Typically ballast resistors should be mounted in the engine bay.

Do not use common 0.25W or 1.0W resistors, as these will burn out almost immediately. 50W resistors should be used. These are relatively uncommon at hobbyist shops, but are readily available from your Link dealer in groups of 2, 4, 6 or 8 resistors on a heat sink.