Formula Fbody

Has anyone tried the Delphi (MSD) 55, 65 or 75lb Fuel Injectors - Low Impedence. How do these injectors work at idle? I see that you can use these with the stock computer. If you have used them please let me know what you think of them?

Thanks,

KEN

IDOXLR8

What kind of application do you have that needs that big of an injector? If you are going to run a low impedance injector with your stock computer than you will need an Acceleronics impedance convertor. Remember you will need to have your computer reprogrammed to run that big of an injector. For a blown application I like Siemans over MSD.

Live for TAs

I have not bought new injectors yet, but will second the above post based on my research. I'm looking at a set of Siemens 57# units. Check here & at ls1.com in the tech threads about the MSD injectors vs. the Siemens. The Siemens are also available as high impedance, which will work with your computer. The MSD ones will not work w/o a converter (extra $) and cost the same.

kmook

Only high impedance injectors will work with the stock computer without a impedance converter. The largest high imp injectors i've ever seen are those 57# Siemens.

HungryT/A

Just on a sidenote.
My friend used to run #50 high impedance injectors on his Syclone. Then he switched to #50 low impedance ones with an imp. converter and he said it's night and day difference. He had a hard time dialing in the idle fueling with the high imp. injectors, the stock computer simply couldn't control these big injectors efficietly, now with the low imp+converter his idle is *** smooth as silk.
hope this helps

Injuneer

Low impedance (peak and hold) injectors are used for a reason. They operate much faster (1.0-1.5mS faster than high impedance/saturated), are more accurate and more consistant.