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yes you can run iabs correctly with pt3 ecu

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    #16
    Narrowband sensors/gauges are usually no more than a pretty light show, from my experience. I suppose it would show if you were running extremely lean, at least.

    You're right about open loop being richer than closed loop, since it's safer to run rich than lean. Still, depending on HOW rich it is, it may prove to be detrimental to performance. The extra air allowed by the larger manifold and IAB system won't be much of a help if the ECU just ends up overfueling! It could cause an issue when going WOT as well, transitioning from a relatively lean closed-loop operation to a richer open loop fueling map.

    OR, the added fuel in the pre-set fuel map might be perfect for the increased intake volume...






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      #17
      I just wanted to throw this out there... IAB's don't open up at 3500 rpms...

      Benchtest IABs-How to?
      Last edited by cloudasc; 06-09-2014, 12:20 PM.
      PT3/6 Development Thread | My 1991 LX Coupe | DIY: 90-93 Tcu Fix

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        #18
        Originally posted by cloudasc View Post
        I just wanted to throw this out there... IAB's don't open up at 3500 rpms...

        Benchtest IABs-How to?
        Exactly my point, the title of this thread is deceiving. This does not run them correctly, as the title says.
        Originally posted by Mishakol129
        Do not disrespect my intelligence. I am the smartest person I know : )

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          #19
          Originally posted by deevergote View Post
          You're right about open loop being richer than closed loop, since it's safer to run rich than lean. Still, depending on HOW rich it is, it may prove to be detrimental to performance.
          Exactly. I think maximum power is generally made at around 13.5:1 air fuel ratio, at least for a naturally aspirated engine.

          It should be noted that OEM fuel calibrations often go richer than this at WOT, but this is done for catalyst protection, not additional power. The richer mixture cools the exhaust temperatures and keeps the catalyst from getting too hot during extended WOT operation.

          Comment

            #20
            Originally posted by cp[mike] View Post
            ...

            most people get rid of the bypass valve, but they leave the plug dangling. also, not every model comes with the valve - I think it is only automatics? or was it only EXs?
            My 5-speed '90 DX had the valve and wiring. Removed the resonator and valve but kept the wiring. This is good news! I still have an H23 IM i have yet to install. Knowing this makes things simpler.


            Form.Follows.Function

            Comment

              #21
              Originally posted by cloudasc View Post
              I just wanted to throw this out there... IAB's don't open up at 3500 rpms...

              Benchtest IABs-How to?
              what rpm do the iabs open
              my build
              http://www.cb7tuner.com/vbb/showthread.php?t=202734

              Comment

                #22
                4800
                Originally posted by Mishakol129
                Do not disrespect my intelligence. I am the smartest person I know : )

                Comment

                  #23
                  dam i thought the opening was 3300 for some dam reason. well then it does need to be changed to almost run them lol
                  my build
                  http://www.cb7tuner.com/vbb/showthread.php?t=202734

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                    #24
                    Yup, you're hurting low end by having them open that low, and by not having the proper fuel and timing.
                    Originally posted by Mishakol129
                    Do not disrespect my intelligence. I am the smartest person I know : )

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