Using high impedance injectors, what needs to be done

[Fubar231]

Im looking at purchasing some rx7 550cc injectors, but there high impedance. Ive been searching through the forums trying to gather info, and so far ive just heard people trashing them mainly, but ive heard a few things to do. One was to unplug the resistor pact connector, get something that has the same plug and cut it, and simply loop the wires to fool the tccs to think its still using the resistor pack, cause i read the car wont start without. Anyways, what would be another solution? Use the little resistor things just drop the impedance from the high injectors down to low so i can use the resistor pack. I need some input please!

Thanks in advance!

Few things i did read

Injector temperature

Not only do the injector drivers get hot, but the injectors themselves heat up from the current passing through them. We ran one three minute test with the injectors in open air and not being cooled by water.

* After 3 minutes the stock injectors were 40 degrees C.
* After 3 minutes the 2.5 ohm injectors were 100 degrees C

Injectors are normally cooled by fuel. What these figures show is that the 2.5 ohm injectors without a resistor pack run hotter heat the and fuel more than stock injectors.

Conclusions

* Running low impedance injectors without a resistor box will substantially increase the temperature of the transistor driver IC due to the increase in current flow.
* The temperature increase will depend on your driving.
* If that temperature remains high enough for long enough the driver transistor will be damaged.

But what does all this mean, when using high impedance injectors in a low impedance system? I cant seem to find any good info! Btw the above info was gathered from hondata's website.

 

[thevork]

You can do nothing and just use them and you'll be okay.

I have the high imp ND550's from an RX-7 and I did the resistor pack mod as you described and it run's great. From other people I hear they are running thesame injectors without the mod so you'll be good to go one way or another.

BTW did you search? Here's my thread asking about the same question:
http://www.supramania.com/forums/showthread.php?t=12235&highlight=nippondenso+high

I included all the info and answers in that thread I got back when I was rebuilding mine.