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Injector upgrade for chipped h22a

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    Injector upgrade for chipped h22a

    I've been looking for specific info on this topic and finally decided to ask a question here. I see a few of you here are running rdx injectors on your h22a motors. My questions are (1) how critical is a tune right after doing this upgrade in terms of drivability? (2) Could I not get my tuner to redo a base map to run higher cc injectors until I can get to a dyno? (3) And do I need to install my walbro fuel pump prior? Also I am assuming that running rdx injectors in our cars on an h22 will require obd1 to obd2 harness to wire them in, unless the rdx was obd1 that Im not aware of. Thanks in advance for any help or advice. Off the top of my head my mod list includes:

    2.5 inch exhaust with cat delete
    No name 3 inch short ram intake
    Aem fuel rail
    Skunk2 cam gears
    7.9 lb flywheel
    Chipped p28, vtec engagement set at 4700 rpm

    #2
    I'm no pro here as I have not ran these. Didn't realize you can gain up to 5HP off these. Great read here
    https://www.preludepower.com/threads...n-h22a.310446/.

    As noted at rywire though (https://www.rywire.com/product-p/inj-rdx-410cc.htm), you do need an adapter if you are running a OBDI H22. So you need the injectors, rail, rail adapters, and electrical adapters/cables. Guessing these only come in 410cc, as they were made for the K series (so I'm reading).

    & they sell there here:
    http://www.rywire.com/product-p/inj-adapter-1-rdx.htm

    Or the rail + adapters + electrical connections.....
    https://www.rywire.com/product-p/inj-rdx-410cc.htm

    As for the tune, only if you are changing the amount of fuel (cc) I believe. This is more of a "I put new plugs in and it works better" thing I believe. Same amount of fuel and air, just better combustion (fuel atomization) happening in the chamber. But one still needs to program the new injectors into the ECU as well. They may have different settings for timing as well. Rolling tune may be required to ensure they are functioning properly too (this is where I'm not a pro). Cheeers.

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      #3
      I miss these type of days. These were the fun days. Although I was a little late to the party, Keshia was really a great one.
      The Lord watches over me!

      "...they did the bowties, I did the ascots, as much as I have, I'm still reppin' the have nots..."

      - So Raspy

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        #4
        Thanks for the feedback. Its seems like this would be a beneficial mod in the future, but not until I can get to a dyno to ensure the timing and everything is correct. I might not even have to fork out much for the injectors themselves because my local shop has used rdx injectors just sitting there which I can aquire for next to nothing. I will then just need the electrical and rail adapters which I can get from rywire. Much appreciated.

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          #5
          Ahhh the good old days, trying to bring it back

          Comment


            #6
            Originally posted by BLU-ANGEL3737 View Post
            Thanks for the feedback. Its seems like this would be a beneficial mod in the future, but not until I can get to a dyno to ensure the timing and everything is correct. I might not even have to fork out much for the injectors themselves because my local shop has used rdx injectors just sitting there which I can aquire for next to nothing. I will then just need the electrical and rail adapters which I can get from rywire. Much appreciated.

            Make sure to have the injectors professionally cleaned before using if they have been lying around.

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              #7
              If you are changing injectors please have your tune corrected. You need to tell the program what size injectors you have..it is more than just adding fuel to the tune.

              When you say "chipped" is that just a basemap tune or an actual tune for your engine? I am hoping you at least have a Wideband to monitor the AFR.
              Keep Pushing..

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