Help! What injectors are these? Someone w/ known Nismo 740cc please chime in!!!!

[redsx13]

I tried searching but the results are all over the place! These are basically brand new so I really don't want to spend the money to get them cleaned and flow tested. The following are pics taken next to the previous injectors (s15 injectors part # A46-F52) for reference.

The part number is A46-Z00 , 0125Y16

http://i279.photobucket.com/albums/kk141/redsx13/image-25.jpg

The darker one is an s15 injector

http://i279.photobucket.com/albums/kk141/redsx13/image-26.jpg

http://i279.photobucket.com/albums/kk141/redsx13/image-27.jpg

What is throwing me off is the "Y" in the second part number 0125Y46, all the Nismo 740 injectors I have seen have the first part if the part number matching (A46-Z00) but the second part is all numbers and no letters, not sure if this makes a difference however.

Another strange thing is that the car is tuned for the s15 injectors (480s), but I'm upgrading the injectors, so I put what I thought were the 740s in, expecting the car to not even start or run. BUT! When I went to start the car it ran perfectly with the new injectors! How could this be? Are they both sets of s15 injectors?

The ecu is a power fc, running for 4 years dyno tuned on s15 injectors.
Thanks!!

[fliprayzin240sx]

It looks like 740s but it could anything and everything. Red is that one annoying injector color since it could 740, 440 or 270cc injectors. Honestly, if you're not sure, spend the $80 to get them flow tested and cleaned.

As far as it running normal, what MAF are you running? For some reason, my Nismo 550cc with Z32 MAF would run on a stock RB25 ECU.

[redsx13]

Well, I tried to drive it up the street, doesn't drive great, not well at all, but it does drive. It has no maf, just a map sensor

I don't believe they are 270s, I have those as well and the color is not the same

[redsx13]

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