Quote:
Originally Posted by scarceller
3.2L Motronic Injectors are Low Impedance
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If I have a choice, why would I choose a low-Z or high-Z injector?
"Until recently, most performance injectors with higher flow rates (900cc/min or more) would likely have been low impedance injectors. This is because in the older (fat body style) low impedance injectors (’80s and ’90s designs) had faster opening response times and generated less heat when they were being operated with proper peak and hold injector signals. This meant that at higher flow rates and lengthier duty cycles low impedance injectors would outperform their high impedance counterparts. Since so many of the performance injectors back then were low impedance injectors and they were actually better than their high-z equivalents, the common belief which still lingers today (though it is no longer correct) is that low-z injectors are the best for your high performance vehicle.
Today’s high impedance injectors, however, are able to outperform those older low impedance injectors at larger flow rates due to their newer designs, tighter manufacturing tolerances and much lighter moving parts(examples are our 900cc, 1100cc and 2150cc/min injectors). A valve and spring assembly from a current high-z injector may weigh less than 1/3rd of the assembly from an older injector.
Thanks to this newer technology the current high-z injectors are more linear throughout their pulse range; they are able to repeat shorter pulse widths consistently which means they can provide excellent part throttle and idle characteristics, and operate at higher maximum operating pressures.
These facts make choosing one of the new high-z injectors we offer a no-brainer if your ECU and fuel system setup allows you the choice, and the budget will stretch to the slightly higher average cost."
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