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  1. #1

    What would you do? High Impedance vs Low Impedance

    Here is my situation i need bigger injectors and managed to find a set of 4 locally ( out side the usa) although i just need 3 Of pl4-1000rc
    Attachment 296828

    i noticed the once i have used in the past are High Impedance (13.5-14ohm) and the once i found here are Low (2-3ohm). i have done some research and found out that i can use the low impedance injectors with resistors packs to bring them up and not burn the cpu,


    the real questions are:
    #1 has any one done it before with 100% results in the jetski community?
    #2 would the resister packs interfere in any way with my custom map i have on the cpu?

    or should i just wait 3 weeks and order them from the states and get them in a High Impedance and call it a day?


  2. #2
    GasResearch-VT.SE's Avatar
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    Why make a "itsabitsa" just use the correct parts.

    Call it a day and be done with it... Why cause possible problems later on. I've heard of it being done, but never seen it done.

  3. #3
    Got Boost? psycho rxp's Avatar
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    Just use the High Impedance injectors, and nothing else will be needed.
    On another note, I wouldn't use the style injector in that picture, as the rodchester style metal body injectors don't like very high fuel pressure, as they can lock up around 70 psi using the RRFPR, and high boost. Stick with the plastic body bosch style,or Siemens, or Injector dynamics injectors.

  4. #4

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    here article on Honda car stuff same ,same
    http://www.hondata.com/techlowohminjectors.html

  5. #5
    Got Boost? psycho rxp's Avatar
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  6. #6
    Turbonut's Avatar
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    Quote Originally Posted by psycho rxp View Post

    I have been told these have different latency to what we normally run and so don't work as well as they should with our ecu. Can anyone confirm this?

    I would like to use them but only if they work the way they should.

  7. #7
    boost junkie skidoochris's Avatar
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    every injector has different latencys and they can not hurt the ecu
    the only way to fix that problem is with a high end ecu like motec
    but with a cmd you can still do a good job tuning
    those bosch racing 1150cc are IMO the best injectors on the market
    I have tuned them to idle on a boosted yamaha 1000cc sled with a cmd (PCV)
    almost any fuel injection shop can get them for you, if you dont like feebay
    http://www.bosch.com.au/content/lang...html/index.asp
    Last edited by skidoochris; 04-03-2013 at 07:27 AM.

  8. #8
    imp0ster's Avatar
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    Quote Originally Posted by skidoochris View Post
    every injector has different latencys and they can not hurt the ecu
    the only way to fix that problem is with a high end ecu like motec
    but with a cmd you can still do a good job tuning
    those bosch racing 1150cc are IMO the best injectors on the market
    I have tuned them to idle on a boosted yamaha 1000cc sled with a cmd (PCV)
    almost any fuel injection shop can get them for you, if you dont like feebay
    Bosch are the best period. Their on/off time (latency in ms) is negligible and I've never had to factor it in. The only injector I worry about would be delphis and lucas and that's what the injector clinic is for. Buy Bosch and be done with it. If you're buying second hand or from a normal company have them ship the injectors to a specialist and spend $15/injector for a flow sheet to make sure you're not going to lean out and chip a piston.

  9. #9
    Quote Originally Posted by psycho rxp View Post
    what about no cmd and just a tune?

  10. #10
    papafever's Avatar
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    Quote Originally Posted by DR2006RXP View Post
    Here is my situation i need bigger injectors and managed to find a set of 4 locally ( out side the usa) although i just need 3 Of pl4-1000rc
    Attachment 296828

    i noticed the once i have used in the past are High Impedance (13.5-14ohm) and the once i found here are Low (2-3ohm). i have done some research and found out that i can use the low impedance injectors with resistors packs to bring them up and not burn the cpu,


    the real questions are:
    #1 has any one done it before with 100% results in the jetski community?
    #2 would the resister packs interfere in any way with my custom map i have on the cpu?

    or should i just wait 3 weeks and order them from the states and get them in a High Impedance and call it a day?
    I have use low inpe with resistor box and i have found that they work better faster reaction than high inpe. I have use them on supercharged and turbo aplicattions and they work perfect. I hope this helps.

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