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  1. #1
    shhr's Avatar
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    air/fuel gauge installed

    I finally installed my air/fuel gauge on my RXT. I have not been in a hurry as I am waiting on my RR SC

    I started it on the hose and it was reading 11.7 I reved it up to adout 3500 and no change, I think this is rich enough to add the RR impeller without the injectors, I am going to install each item and get a reading and see how far I can go before I need to add the injectors. That is if I can hold off until I get my SC those boxes with those expensive parts on the floor are starting to talk to me

    I need to know what is the SAFE range, and for those that have the gauge did you use the 3rd fuse and how did you reinstall the fuse cover. I used one of the spare wires to tie the 2 hot wires together and used the single 22 GA wire single end in the fuse and was able to push the cover back on


  2. #2
    Vern's Avatar
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    Keep us updated ... I would be curious to see what A/F ratio you get right now, before the RR SC, at different speeds on the water - cruising slow, medium, and WOT. Then after the RR SC too. What mods do you already have installed?

  3. #3
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    shhr, i thank you in advance for the testing you are doing. i will (or should say want) to run new rr sc imp and air intake on STOCK injectors/ecu SAFELY. i dont have a a/f gauge and therefore have no real concrete way of knowing that it will be safe. please keep me posted

  4. #4
    shhr's Avatar
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    Hey Vern,

    The only thing I have done is removed OPAS and filled the ride plate holes,

    I hope to get on the water in the next few days and will get stock readings at different RPM`s

    I really wont to install the thru hull exhaust as I dont think it will effect the ratio I will keep you guys updated on the numbers

    now just help me get my RR impeller

  5. #5
    Site Admin Green Hulk's Avatar
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    RR impellers should ship this week.

  6. #6
    shhr's Avatar
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  7. #7
    HOSS's Avatar
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    Thumbs up

    PHUCIN AYE

  8. #8
    shhr's Avatar
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    Well I could not stand it I had to install something so I just finised installing the thru hull exhaust what a pain in the ass I dont see how you can install it by yourself and your arms must be 6 feet long

    when I fired it up it sounded awsome well worth it, I did not notice any change in the air/fuel reading should have running numbers soon

  9. #9
    shhr's Avatar
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    Ok here are my air/fuel findings on my 05 RXT basicly stock except thru hull exhaust

    1800 RPM`s = 12
    5000 RPM`s = 13.3
    6000-6500 = 13.5-14 (most it ever read)
    7000 = 13.1
    7500 = 12.8
    8000 or WOT = 12.5

    outside air was 90 not sure about humity the readings did vary slightly but these numbers are what I saw consistently

    Does anyone know what number wiuld be considered LEAN

    once I install the RR SC which should be soon i will post new numbers I just need to know what is safe first

  10. #10
    Site Admin Green Hulk's Avatar
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    I think you will go too lean with the RR impeller at WOT considering you are already at 12.5. You really want to see about 11.7 - 12.2 at WOT.

    The 13 you are seeing at cruising RPM is normal and not an issue as you are not under a load.

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