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injector impedence

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Old Nov 28, 2007 | 07:35 AM
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Default injector impedence

I have read a few different things on these forums...

1. I read you need an injector resistor box if you use peak and hold rc injectors, but you don't if you use saturated.

2. I also read you only need an injector resistor box if the injectors are 750cc or higher.

Which one of these is correct? I have rc peak and hold 600cc injectors. I have the resistor box ready to install. Please clarify. Somebody who really knows what's going on please respond.
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Old Nov 28, 2007 | 07:40 AM
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rc750 do not need a resistor, although 1000c rc's do. IP 880 and 620 need a resistor box etc...
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Old Nov 28, 2007 | 08:10 AM
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Originally Posted by Soul Coughing,Nov 28 2007, 08:40 AM
rc750 do not need a resistor, although 1000c rc's do. IP 880 and 620 need a resistor box etc...
RC makes both sat and p&h 750. I belive you need the box for all p&h regardless of injector size. Correct me if iam wrong.
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Old Nov 28, 2007 | 08:40 AM
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Originally Posted by misz,Nov 28 2007, 12:10 PM
RC makes both sat and p&h 750. I belive you need the box for all p&h regardless of injector size. Correct me if iam wrong.
that is true, but you can get 750 cc RC's without a resistor box! whereas the 1000cc RC's do!
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Old Nov 28, 2007 | 11:30 AM
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not to go off subject but isn't there a company that makes 880cc injectors that are saturated
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Old Nov 28, 2007 | 12:00 PM
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With the EMS or even the stock ECU, you will need an injector driver box or resistor box if you go over 750cc injectors with the RC's. 750's are the largest you can go with as a saturated injector.

If you go with a saturated injector, you can just plug them straight into the wiring harness, if you go with a peak and hold, you will need a driver box or resistor box wired in.
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Old Nov 28, 2007 | 04:37 PM
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what's the difference between P&H and Saturated? Why would you want to use P&H?
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Old Nov 28, 2007 | 05:49 PM
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peak and hold are supposed to be better when delivering fuel. Also RC doesn't make certain injectors that are saturated. The stock s2000 injectors are saturated.
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Old Nov 29, 2007 | 09:14 AM
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Originally Posted by chairmnofthboard,Nov 28 2007, 08:37 PM
what's the difference between P&H and Saturated? Why would you want to use P&H?
Yes, peak and hold are much better and saturated injectors only go up to a certain size. If you want bigger injectors for your specific power goals, you will have to change to peak and hold.
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