i have low impedence and my 720's are high so here is a pic to double check i bought the right ones!



i think this will clarify for others also if they need it. if there right?

 

Yes. I've posted pictures of this exactly and the radioshack part # before.

 

oh, i searched but didnt find any pictures,lol sorry!! i was also searching for the wires directly from ecu and couldnt figure out for the life of me which ones, i guess ill trace from the secondaries down as far as i can and solder them in the engine bay

 

No problem. I'd recommend soldering near the ECU under in the passenger side footwell. Less heat and vibration plus it'll make for less clutter in the engine bay not that they take up much space at all. Plus you won't have to split open the loom for the harness.

 

i was just searching more and still cant find which wires i use? do you happen to know off hand which connector from the ecu and color? im really not much of a diagram reader. only thing i found was it doesnt matter which wire to the connector is used. is this correct also?

<<<<<noob!! sheesh!! sorry! lol!

i also just noticed i posted wrong. I HAVE HIGH IMPEDANCE AND THE 720'S ARE LOW!!

 

Your fuel injectors go to the left most plug on the ECU, its also the smallest plug. The fuel injector wires are all light green with different color stripes. Your front primary injector is just light green, your rear primary is Light green and blue. Front secondary is Light green and white, and your rear secondary is light green and red. Heres the pins in the ecu if thats not exactly as the wires are, but if its a s4 harness im pretty sure thats the correct wire colors, so theres 10 pins for that plug, the top row will be A and bottom will be B, top will be 1-5, and bottom 6-10 so you can locate the right pin easy (i would post a pic but i cant find my camera). Anyway, front primary injector is A3. Rear primary is A4. Front secondary is B2. and rear secondary is B3. This is where all the injector wires go if you are looking at the pins on the ECU. If this doesnt make sense i can post a pic tomorrow probably, if any of this is incorrect someone please correct me, but as far as the FSM and 88 rx7 wiring diagram show this is correct.

 

Yep, you bought the right ones.
Personally, I rather go with the higher rated 20W ones, but I don't think Radio Shack sells them.
There's some guy on eBay that also sells some other type of resistors.


-Ted

 

Since I had to change connectors, I just spliced them in at the rail.

 

Those resistors will work just fine, but for anyone else who sees this thread in the future, there are better choices. Wirewould resistors come in many formfactors. The ceramic style are the cheapest and most common. However, better resistors are available that are already mounted in finned heatsinks, with flanges that can be mounted directly to a surface. An ideal surface is the top of the ECU case. You can remove the cover, then bolt your 4 resistors to the top of the ECU, and run your harness connections down the body of the ECU to the plugs. Makes for a much more sanitary installation, and you don't have to put resistors into a hostile environment (most of the resistors you buy are NOT rated for the engine bay).

 

Your fuel injectors go to the left most plug on the ECU, its also the smallest plug. The fuel injector wires are all light green with different color stripes. Your front primary injector is just light green, your rear primary is Light green and blue. Front secondary is Light green and white, and your rear secondary is light green and red
thanks, im sure there's better resisitors but if you say they'll be ok in by the ecu then ill just do it like this!!^^^^^^ thanks alot eastcoastdrift! I know now which wires but maybe a few pictures would be great for others in the forum!

 

NEvermind

 

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You wouldnt want high flow high impedence injectors anyways. Do a search for peak/hold injectors vs. saturated to find out why.

 

^^https://www.rx7club.com/showthread.p...hold+injectors
this is the only post i found?
if im putting a turbo on my 6port, dont i want 720's for the secondaries?
i know everyone will say to but im confused? my 88 has high impedance(ecu# n327) and the 720's i have are green top's part # 195500-0830. to my knowledge these are low impedence, hence why i need the resistors right. could you please explain the peak/hold verse's saturated to me and if it aply's to me or not?

thanks