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Old 12-15-2004, 04:34 AM   #1
jared nelson
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Default High Low inpedance Injectors, Which EMS can do both?

Now i know this info is presented in a sticky in this thread, but, Im still not sure. Im wondering if its an old post.

anyways here are my ?s

are PE injectors high or low impedance?
can the UTEC control both high and low?
can the link control both high and low?

reason i ask is because i have PE 800s, and id like to keep them. I how ever and going with possibly the tec2 standalone, and i hear it only runs one of those types of injectors is there any truth to that?
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Old 12-15-2004, 06:57 AM   #2
happasaiyan
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high
not without modification
i dont know
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Old 12-15-2004, 06:58 AM   #3
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thanks!
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Old 12-15-2004, 07:50 AM   #4
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with the link you need ballasts to drive low imped. injectors.
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Old 12-15-2004, 07:53 AM   #5
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ok well the goal is to stick with my pe 800s so i guess the link, the hydra, and a few others would do that.
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Old 12-15-2004, 08:40 PM   #6
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Some advise: I run a Tec2, my frined and i found you can't run low IMP inj but you can get a resistor block from a elcipse from a junk yard and use the factory resistor pack and then they will work! no problems just saved $500 for injectors. And low imp inj are way cheaper than high IMP INJ
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Old 12-15-2004, 09:23 PM   #7
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Quote:
Originally Posted by jeff22
Some advise: I run a Tec2, my frined and i found you can't run low IMP inj but you can get a resistor block from a elcipse from a junk yard and use the factory resistor pack and then they will work! no problems just saved $500 for injectors. And low imp inj are way cheaper than high IMP INJ

that is compleatly contradictory to every thing i have ever posted about the tec and what is in the tec manual
the injectos shiv sold with his kit were RC low imp that were only 3ohms


stock/high ~14ohms

low ~2-3 ohms

when i talked to the PE ppl at sema they told me that the PE side feed 550s were low.. i think the anwser to origional question is "both"

the tec will run both

don't buy a 2 save up some $$ and get a 3r
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Old 12-15-2004, 11:43 PM   #8
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email from electromotive tech support...

The Tec2 will run either, doesn't know the difference.
Electromotive Tech Support

this was my question...
can the tec 2 support low and high impedance injectors?
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Old 12-16-2004, 08:43 AM   #9
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Well they say it doesent know the difference but the only way we got the car to push the injector was with the resistor packs.
We also thought the same about the injectors! Try it? Maybe your results will differ!
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Old 12-16-2004, 01:52 PM   #10
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where do we get the idea that the utec cannot drive low Z injectors? maybe older hardware platforms, but not the latest, at least according to these words to the contrary:
http://forums.nasioc.com/forums/show...ance+injectors
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Old 12-16-2004, 08:20 PM   #11
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stand alones: Element Hydra, Motec, Tec II, Haltec, AEM.........

That's it.

You might be able to place capacitors in line with the fuel injectors, but do you want to mess with probably the single most important part of your engine, fuel delivery.
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Old 12-16-2004, 08:32 PM   #12
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Electrically youd want your injectors to be matched to whatever circuit theyre connected to. I wouldnt put any injectors in my car that dont match the stock one's input impedance as you can FRY the other end of the circuit!!!!!!

Simple transmission line basics : you want your 'load'/injectors to match the source

Whats the difference in performance to mess with injector's impedance ?????
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Old 12-17-2004, 05:32 AM   #13
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yeah i agree... i was asking because i was interested in running the tec2, and i wasnt sure if that would be allright with the pe800s i have. which i think are high impedance.
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Old 12-17-2004, 10:02 AM   #14
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Quote:
Originally Posted by bboy
You might be able to place capacitors in line with the fuel injectors, but do you want to mess with probably the single most important part of your engine, fuel delivery.
you would most definitely want to use RESISTORS, not capacitors, in this application. and the resistor mod trick would work just fine to limit max current flow.

this is not a transmission line, btw. there are clamping circuits already in place in the ecu to control flyback energy from the rapid dI created as the injectors pulse on and off. otherwise, they'd already be fried.



hth
ken
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