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  1. #1

    Riva EFI controller on GP1300R

    I put a Riva EFI controller on my 2005 but i have not yet put on the higher compression head so i am trying to set it at the lowest setting. But the "1" setting is at the 7 o'clock position on the dial. Is it at the lowest setting when dialed all the way clockwise in ? In that case it is not at the "1" setting. When i tried it at the 4-4-1-5 setting as recommended in the sticky thread, it burbled and acted rich, so I know that setting is too rich. When you dial back to the "1" setting from there you are going counter- clockwise, but when it is all the way counter-clockwise it is about four marks past the "1".


  2. #2
    powerstroke specialist mikegp's Avatar
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    because counter- clockwise is where #1 start. hey i've got a head already cut for 150. it came on a ski we part out , don't know who did the job but it ran for one month before i decide to part the ski.
    Last edited by mikegp; 08-31-2014 at 09:22 AM.

  3. #3
    powerstroke specialist mikegp's Avatar
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  4. #4
    ....because of how the unit is 'oriented' when you are looking at it, the #1 postition varies. If you look at the pdf Mike pasted, you'll see the unit is in the #1 one position but reads 11:00 o'clock. I instaledl mine 'sideways' so there is less confusion.

  5. #5
    Thanks i have it all the way in clockwise . I'm surprised it is not acting super rich. Also the arrows are very hard to see to know which side of the line is the where the setting is.

  6. #6
    backed it out all the way counter-clockwise to #1 and though i did not notice any significant change in performance ( difficult to assess since I had my 160lb 14 yr old son on the back ) I did go a lot further on less gas than I did 2 weeks ago with it in clockwise. I do have a decked head I will put on in the winter and will use the efi then. Mike, I don't know if you can use our weak Ca 91 octane 10% ethanol junk gas with a 150 psi head, can you ? I hear more like 130-135 psi for 91 octane is the limit. You guys out east have 94 octane gas without ethanol, but we have generally better weather.

  7. #7
    powerstroke specialist mikegp's Avatar
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    what do you mean 94? we only have 93 and it contains ethanol too. thats what i use on mine, 160 psi no problem.

  8. #8
    Quote Originally Posted by mikegp View Post
    what do you mean 94? we only have 93 and it contains ethanol too. thats what i use on mine, 160 psi no problem.
    I saw 94octne once in upstate NY once so I thought all the East had it. We only have crappy 91 and cannot find ethanol free fuel anywhere, even at marinas. I'm not sure how much compression you can run on 91 octane reliably , but It seems 135 is doable.

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