I have an 87 TII with the top half of the engine taken apart and all the parts in the back and I'm trying to figure out if I have the correct injectors. The injectors that came with the car are purple, which I determined are high-impedence 550s. But the problem is that the clips on the harness don't match and were broken when the previous owner forced them onto these injectors. I just want to put this car to stock for now. So I guess I just want to know what the stock injectors should be. Also, I'm not sure I understand the difference between high and low-impedence. Which is better for what? Any helpful information/advice would be much appreciated. Thanks a lot.

Chris

 

Year type impedance plug style plug notch position flow rating color part number
84-85 13B NT low square center 680cc orange 195500-0900
86-87 13B NT low square center 460cc red 195500-1350
86-87 13B T low square center 550cc tan 195500-1370
88 13B NT high square offset 460cc purple 195500-1350
88 13b T high square offset 550cc purple 195500-1370
89-91 13B NT high oval center 460cc red 195500-2010
89-91 13B T high oval center 550cc purple 195500-2020

Straight off http://www.rotaryresurrection.com

There's really no better/worse with the impedance that I know of, the injectors just need to match the ecu.

 

That's perfect! Thank you. Now another question I have is whether or not I can run the s4 injectors in s5 fuel rails?

 

I'm pretty sure that'd be a go. The injectors are physically the same. The only question would be the rail mounting position. I think they're the same.

 

The mounting positions do indeed seem to be the same. Thanks for the help guys.

 

You would need to put in a resistor (or maybe it's the opposite way...). Either way, match up the resistance and they should work just fine.