opinions on rx7 460cc injectors im about to install
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I put together a diy Turbo thread for my 2000 nb some time ago. The stock clutch went a month ago. I ditched the Garrett t3 once it failed me. I have been running the godspeed "super 60 t3" since September and love it. Autotuned on 7 psi with MS2. Have not dynod the car yet but I feel that it is time for more boost since the flyin miata clutch is broken in. I don't think the stock injectors will handle desired boost of 12psi. But I fucked up when I piecing together my kit and bought the red top rx7 injectors that you can't tell are high or low impedance until you try them out.what can I do and anyone see a problem here?
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I looked up the number on the injector a while ago. I just have the one set that is "either/or" so i'm kinda stuck on that. How do I test the resistance to know if they're high or low?? what numbers should I be looking for. And can I still tune with them if they are low impedance on my MS II>??? thanks for the input guys
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http://miataturbo.wikidot.com/fuel-injectors
High Ohm/saturated direct fit Miata plug and play replacement injectors (“F” connector)
89-91 RX-7 NA 460cc - Red Top #195500-2010
89-91 RX-7 Turbo 550cc - purple top #195500-2020
As Cardriver and Tech both said... put a meter on them and get the resistance. If its more than about 12 Ω, you are golden.
The link above also has pics for identifying high and low ohm F connectors
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/39982-opinions-rx7-460cc-injectors-im-about-install-d2325070080.jpg?dateline=1334192925)
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/39983-opinions-rx7-460cc-injectors-im-about-install-d2325070040.jpg?dateline=1334192925)
Notice the connector clip tab?
RC Engineering sez:
http://www.rceng.com/faq.aspx#Do_I_n...my_application
Of course if you are dead set on buying new injectors, you can always look into a set of FiveOhMotorsports or Injector Dynamics EV14s and ditch the 1970's level injector technology
High Ohm/saturated direct fit Miata plug and play replacement injectors (“F” connector)
89-91 RX-7 NA 460cc - Red Top #195500-2010
89-91 RX-7 Turbo 550cc - purple top #195500-2020
As Cardriver and Tech both said... put a meter on them and get the resistance. If its more than about 12 Ω, you are golden.
The link above also has pics for identifying high and low ohm F connectors
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/39982-opinions-rx7-460cc-injectors-im-about-install-d2325070080.jpg?dateline=1334192925)
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/39983-opinions-rx7-460cc-injectors-im-about-install-d2325070040.jpg?dateline=1334192925)
Notice the connector clip tab?
RC Engineering sez:
Do I need high or low resistance injectors for my application?
Injectors are classified into two categories.
1. High impedance/resistance (saturated) 12-16 Ohms.
2. Low impedance/resistance (peak & hold) 0.5-6 Ohms.
Saturated injectors require roughly 1-1.5 amps to open the injector. Peak & hold injectors initially needs about 4-6 amps, and once open drops to roughly 2-3 amps to keep it open.
ECU design will dictate the use of one or the other. Most late model cars will use saturated injectors.
Injectors are classified into two categories.
1. High impedance/resistance (saturated) 12-16 Ohms.
2. Low impedance/resistance (peak & hold) 0.5-6 Ohms.
Saturated injectors require roughly 1-1.5 amps to open the injector. Peak & hold injectors initially needs about 4-6 amps, and once open drops to roughly 2-3 amps to keep it open.
ECU design will dictate the use of one or the other. Most late model cars will use saturated injectors.
Of course if you are dead set on buying new injectors, you can always look into a set of FiveOhMotorsports or Injector Dynamics EV14s and ditch the 1970's level injector technology
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Good call, I didn't realize Renown was selling FIC. I'd seen Reverent recommend FiveOh in the past, so that's what I bought. I was unaware there was a quality issue FiveOh??
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Last edited by EO2K; 04-11-2012 at 09:33 PM. Reason: Changed ID for FIC, herpderp
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From what I understand, Fiveo buys the cheapest EV14 they can find, then bore it out to whatever they desire for cc-metric.
FIC buys the closest EV14 to their desired cc metric, then bores it out.
FIC's process is similar to ID's, FiveO's process is the classic fleabay injector process.
/YMMV and all though, I've only found that out via copious internet searching.
FIC buys the closest EV14 to their desired cc metric, then bores it out.
FIC's process is similar to ID's, FiveO's process is the classic fleabay injector process.
/YMMV and all though, I've only found that out via copious internet searching.
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Alright here are the numbers, all four have the #195500-1350 on them. But on the other side of the injector, 2 of them have a 25 with "E" on the injector clip. The other to have 26 with "F" on the clip. Still good? lol
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I've seen fully PNP hi-z 460cc RX7s go for as low as $50 in the classifieds here.
However, if you MUST use those...
high ohm---> http://www.witchhunter.com/flowdatapix/d1955001350h.jpg
low ohm---> http://www.witchhunter.com/flowdatapix/d1955001350L.jpg
Or just freaking test them with a multimeter already and get final answers.
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I'll check later tonight. I don't feel like going through that hassle either. If anyone has a set of injectors for sale/ let me know. I need to upload vids of my car and this is all I'm waiting on
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Yeah, I just checked and DW is still doing their "MT Special" upgraded service. The problem is that I only want these things flowed, not cleaned. I may PM or email DW and see if they have a "flow only" service. I really don't feel like spending ANOTHER $80 on injectors I may ultimately never use.
I'm really starting to hate my build
I'm really starting to hate my build
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