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Megasquirt and oxygen sensor

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    Megasquirt and oxygen sensor

    I am considering megasquirting my car and I was wanting to know if I need a oxygen sensor for the car to run properly. I do have a wideband installed.
    bp swapped escort lx, gtr ecu, gtr intake manifold, A code VAF, rx7 460cc injectors, ky clutch, holset hy35 turbo on 8lbs, 38mm tial wastegate, ramhorn manifold, full 3 inch ss exhaust, walbro 255 fuel pump

    #2
    As long as you have your wideband that is connected in with your MS, then you will be fine. What kind of wideband do you have?
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      #3
      ya i ditched my narrow band when i went to ms, i just popped it into the stock location and ran the wire to the ms unit... but ya what wideband are you using, theres a few on the list, but you probably still should set it up for afr not volts, but its really simple....
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      95 escort gt-ms2e/ms2extra pre3.3alpha5 gslender v2.8-e85-vj23@12lbs----dead--

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        #4
        If you read the manual that came with the lc-1, assuming that you have one of those but it's a general rule for all of them, you want to position the wideband sensor anywhere from 12-18 inches down stream from the turbo.
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        I've decided that my car is a girl, she's picky as hell, won't listen to me, always wants to fight me, and when i give her presents it's never good enough and she always wants more.


        <-"Will be the death of this forum"


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          #5
          aem has a different idea, i just put mine in the cs downpipe where they have them ran...


          from aem:
          Mount the O2 sensor in the exhaust system at least 18 inches downstream from the exhaust port. If you anticipate high EGT's (over 800C), run a turbocharger, run at high RPM for extended periods of time or plan on running leaded race fuel then you must mount the sensor at least 36 inches or more downstream of the exhaust port as all of these can cause the sensor to overheat.

          i had the sensor back about a foot and a half before i was on ms. i had the stock o2 in the stock location and the wideband near the flex pipe, and it seems to get about the same readings so far. i still need an egt gauge to see what kind of heat is coming out tho...
          92 protege lx-

          94 protege lx-

          95 escort gt-ms2e/ms2extra pre3.3alpha5 gslender v2.8-e85-vj23@12lbs----dead--

          are you a thinker, or a believer?

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            #6
            Originally posted by yunvmyegt View Post
            aem has a different idea, i just put mine in the cs downpipe where they have them ran...


            from aem:
            Mount the O2 sensor in the exhaust system at least 18 inches downstream from the exhaust port. If you anticipate high EGT's (over 800C), run a turbocharger, run at high RPM for extended periods of time or plan on running leaded race fuel then you must mount the sensor at least 36 inches or more downstream of the exhaust port as all of these can cause the sensor to overheat.

            i had the sensor back about a foot and a half before i was on ms. i had the stock o2 in the stock location and the wideband near the flex pipe, and it seems to get about the same readings so far. i still need an egt gauge to see what kind of heat is coming out tho...
            800C ?!?! That would be around 1472 F. I hope they mean 800F cuz 1500F is just crazy hot!

            If 800F, then yes, I see above that a lot, especially when on the freeway and doing longer pulls. It needs to be moved further away from the turbo. I have mine lower down in my downpipe. About 24 or so inches from the turbo with my EGT probe right in front of it.
            Create your own VB Gallery here.

            Please DONATE to keep our forum alive!

            I've decided that my car is a girl, she's picky as hell, won't listen to me, always wants to fight me, and when i give her presents it's never good enough and she always wants more.


            <-"Will be the death of this forum"


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              #7
              Originally posted by deadly_sleeper View Post
              As long as you have your wideband that is connected in with your MS, then you will be fine. What kind of wideband do you have?
              I have the lc-1 and it is already installed but I don't have an oxygen sensor with the gtx ecu and it doesn't run the best. I am ready for megasquirt it is going to run so much better than with an safc.
              bp swapped escort lx, gtr ecu, gtr intake manifold, A code VAF, rx7 460cc injectors, ky clutch, holset hy35 turbo on 8lbs, 38mm tial wastegate, ramhorn manifold, full 3 inch ss exhaust, walbro 255 fuel pump

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