S2000 Under The Hood S2000 Technical and Mechanical discussions.

F20C Fuel Injector Impedance/Type?

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Old Nov 13, 2002 | 05:22 AM
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Default F20C Fuel Injector Impedance/Type?

Do we have high impedance injectors or low impedance P&H, stock? I'm guessing high impedance, since it's what most Hondas run, and I don't recall seeing a resistor anywhere under the hood...
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Old Nov 13, 2002 | 07:29 AM
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Have you looked at the wiring diagrams in the Helm's manual?
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Old Nov 13, 2002 | 09:08 AM
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I'd say high impedance as well. I don't think any Hondas have run low impedance since the early 90's. But, I'm just guessing. You could always throw a multimeter on one of them. Low impedance tend to be in the 2-4 ohm range, high impedance in the 12-16 ohm range if memory serves.

UL
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Old Nov 13, 2002 | 12:35 PM
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The '96 H22A IIRC was the last Honda to run P&H with the resistor. If not, then it was '95 (know that one for a fact). Not sure about the F22 and H23 mills.

Greg, don't know about you, but I don't keep my manual up here at work.
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Old Nov 13, 2002 | 01:18 PM
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Originally posted by marcucci
Greg, don't know about you, but I don't keep my manual up here at work.
I must have left it at home today...
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Old Nov 13, 2002 | 02:46 PM
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They are high impedence. You need to run a resistor box to go over 550cc.

Chris
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Old Nov 18, 2002 | 06:44 PM
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If anyone has one out or is under the hood soon they can check.

If you have a voltmeter with an ohms setting you can check it. Pull the electrical connector to an injector and measure the resistance.

High impedance would be 12-16 ohms and low impedance 2-4 ohms.

I will check this weekend when I have a little time if no one has before then.
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Old Nov 20, 2002 | 05:45 AM
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I'm not lying, I promise.
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Old Nov 20, 2002 | 12:06 PM
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anyone know how big they are (i'm guessing like 340 to 390), and what the duty cycle tops out at? honda usually runs them to 85% or so iirc....
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Old Nov 28, 2002 | 07:30 PM
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AEM says they are high impedence.

RC Engineering has not bothered to return my call or email so I don't know size, but their injector size calculator says we must be in the 410 range.
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