General High Z vs Low z

[FAQGSX222]

What kind of difference is there between the injectors when tuning? I’ve currently running a Walbro 255 but upgrading to a Walbro 450 or something similar. I’ve read a lot about the efficiency but the price difference is huge. I’m not saying I’m definitely buying Low Z but I’d like to get some feedback from anyone that might know firsthand

 

[motomattx]

High impedance injectors generally idle and start better, they dont require a injector resistor box, and they are all around easier to tune with/more linear.

 

[Brando_DSM]

^high impedance has become much more favorable with growing injector technology.

 

[1990TSIAWDTALON]

Large low z injectors have a hard time transitioning between low pulse widths and WOT situations. My 1650 low z's gave me that problem and I couldn't tune it out so I put in Hi z 2150's and they were so easy to set up and dial in.
Agree that the Hi z are much easier to tune, at least for what I do.

 

[lasthope05]

Basically low z for injectors under 1100cc and high z for anything above.

 

[FAQGSX222]

Awesome I know which way I’m going