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Thread: O no not another thread about surging

  1. #1
    Registered User hendriksgarage's Avatar
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    O no not another thread about surging

    But yes. So I have had 5 different oil heads all have had some degree of surging from barely noticeable to are you kidding me. My current oil head is a 99R1100RT with staintune exhaust and no cat. which had a pronounced surge at about 1/4 throttle and light acceleration. So I added a O2 sensor fitting and used my Innovate wide range air fuel ratio sensor. I was seeing 15.5 to 1 and leaner. My next step was to check spark plugs valve adjustment and throttle sync ETC. No real change in the surging. My next step was to remove the yellow coding plug and retest. The a/f went to 14.2 to one. On a 2000 mile trip my fuel mileage was 45-50 mpg with virtually no surging. I know everyone has a different approach and results this is just what worked for me.

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    Registered User dieselyoda's Avatar
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    Very nice and simple data. No spreadsheet?
    1997 R1100RT, 1981 KZ 440 LTD, R80RT, R90/6 sidecar, K1100RS,1983 K100RS (Cafe now)

    ďThe major civilizing force in the world is not religion, it is sex.Ē

  3. #3
    Registered User roger 04 rt's Avatar
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    Quote Originally Posted by hendriksgarage View Post
    But yes. So I have had 5 different oil heads all have had some degree of surging from barely noticeable to are you kidding me. My current oil head is a 99R1100RT with staintune exhaust and no cat. which had a pronounced surge at about 1/4 throttle and light acceleration. So I added a O2 sensor fitting and used my Innovate wide range air fuel ratio sensor. I was seeing 15.5 to 1 and leaner. My next step was to check spark plugs valve adjustment and throttle sync ETC. No real change in the surging. My next step was to remove the yellow coding plug and retest. The a/f went to 14.2 to one. On a 2000 mile trip my fuel mileage was 45-50 mpg with virtually no surging. I know everyone has a different approach and results this is just what worked for me.
    Lake Wales is a nice spot, great view from Bok Tower. When you pull the coding plug on an R1100RT it stops using its fixed maps. If you donít add a CO Potentiometer, it gets quite rich at small throttle and if you run non-ethanol gas it even stays rich at cruise (E10 is 4% leaner. Below is a friend using an LC-1 to make a riding log of actual AFR. Here is the full report: https://forums.bmwmoa.org/showthread...l=1#post894523.

    Itís possible to get even better performance than no coding plug (and allow E10 fuel) using an Innovate. Which model Innovate do you have?

    r1100noplugnocopot.jpg

  4. #4
    Registered User hendriksgarage's Avatar
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    I have a LM-1. I use 10% ethanol premium. AS long as I have good power 45-50 mpg and no surging I'm good

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