Injectors

[muchogarcia34]

Hi guys, looking at purchasing my Injectors soon. I'm going with Sard 650cc top feeds for my Neo, but I don't know what this whole impedance thing is about. I'm still learning while I'm building so any help would be greatly appreciated.

I understand that it has something to do with the type of ECU your using, and for me that will be ViPEC, so yeah if anyone can help that would be great.

Cheers

Daniel

[Traitor7]

Stolen off injector.com

What is impedance?

Impedance is the electrical resistance of the electromagnetic coil inside the injector. This is measured in ohms and can be determined with an ohmmeter. Injectors are classified as either high-impedance (also known as “saturated”) or low-impedance (known as “peak and hold”). High-impedance injectors usually range from 11 to 16 ohms of impedance, while low-impedance injectors usually range from 0.7 to 5 ohms of impedance (these impedance numbers are based on what is currently available in the consumer market and are subject to change). Most OEM engine computers are designed to control high-impedance fuel injectors. Low-impedance injectors are generally preferred for racing or ultra-high performance use because they respond more quickly, but aftermarket engine controllers are usually required to control them.

[muchogarcia34]

Cool thanks for that man. So basically Low Impedance is the go for an anftermarket ECU as I understand it.

[RRob]

Read the Vipec manual.

The PnP boards can't be used with low impedence injectors unless a ballast resistor is used.

[Ehgriez]

Don't think he's purchased the ECU yet, its on the list.

Best bet is to ring up the guy tuning it dan and ask them what injectors/size etc you'll need.

[gazza750]

see what impedance the injectors your already running are

ie: GTR run low impedance from factory so the car has the resistor

If your car is already running low impedance new low impedance will plug straight in as you already have the resistor

Edited February 7, 2010 by gazza750