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S5 fuel injectors? Colour and part number?

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Old Dec 11, 2009 | 06:41 AM
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S5 fuel injectors? Colour and part number?

I just bought another FC and will be updating the ecu with the Rtek computer.
question is what colour are the injectors or part numbers that will fit in a 1989 turbo rx7?


19500-2020 are the ones that I have which are 550cc.

Where can I get 720cc?
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Old Dec 11, 2009 | 03:14 PM
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Many places sell top-feed Denso style injectors that will fit all FC fuel rails. I bought some Greddy 720cc injectors for my car, which are really just Densos. They have a light blue top and are low impedance, which means you'll need to wire 6-10 ohm, 10-20 watt resistors inline.
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Old Dec 11, 2009 | 03:35 PM
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Originally Posted by RotaryRocket88
Many places sell top-feed Denso style injectors that will fit all FC fuel rails. I bought some Greddy 720cc injectors for my car, which are really just Densos. They have a light blue top and are low impedance, which means you'll need to wire 6-10 ohm, 10-20 watt resistors inline.
I would rather not wire anything into the harness. Don't they sell normal 720cc that would drop into a 1989 turbo II?

Thanks for the info.
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Old Dec 11, 2009 | 04:08 PM
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If by "normal" you mean high impedance, good luck finding some. Almost all aftermarket injectors are low impedance. The wiring is simple and can be done at the ECU side of the harness.
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Old Dec 11, 2009 | 04:32 PM
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Originally Posted by RotaryRocket88
Many places sell top-feed Denso style injectors that will fit all FC fuel rails. I bought some Greddy 720cc injectors for my car, which are really just Densos. They have a light blue top and are low impedance, which means you'll need to wire 6-10 ohm, 10-20 watt resistors inline.

I bought those same greddy injectors....


Hey IAN, heres the link were I wired mine. Its actually simple...

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/lo-imp-injectors-hi-imp-wiring-766262/
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Old Dec 11, 2009 | 05:13 PM
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Here's a pic of my resistors. I have a high impedance harness w/ all low impedance injectors, so I used four 6 ohm resistors.

Attached Thumbnails S5 fuel injectors?  Colour and part number?-resistors.jpg  
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Old Dec 11, 2009 | 10:52 PM
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Originally Posted by IAN
I just bought another FC and will be updating the ecu with the Rtek computer.
question is what colour are the injectors or part numbers that will fit in a 1989 turbo rx7?


19500-2020 are the ones that I have which are 550cc.

Where can I get 720cc?
shoot bro i got 880 injectors i am selling. along with the wiring harness. if your interested let me know
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Old Dec 12, 2009 | 08:28 AM
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Originally Posted by nd_track_driver94
shoot bro i got 880 injectors i am selling. along with the wiring harness. if your interested let me know
Thanks for the offer but the Rtek mod needs 720cc injectors.
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