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midnightzxt

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Posts posted by midnightzxt

    Wideband into the Megasquirt

    in MegaSquirt

    Posted

    you can also set the type in megatune.

     

    You are having the same problem I had with the LC-1. Check to make sure you are using the correct analog output on the LC-1.. there is one out put for narrowband type on the other output for wideband type. Just check to make sure you've got the correct one first.

    Installed shift light

    in MegaSquirt

    Posted

    it's a three stage light... I'm going to get on the ecu and change the settings to a really low rpm and then rev the engine so you can see the three seperate stages, and then i'll have a ovie of an acceleration through 1 2 and 3. This is just a teaser to show where i mounted it and how it lights up.

    electrical questions quick!

    in MegaSquirt

    Posted

    hahaha... i have a VERY basic knowledge of electronics. Luckily I'm in college and I had 2 electrical engineers (one a grad student) to help me. I did build this shift light tho... and i couldn't put it all together in my head (once again another electical engineer helped me :D ). but, as it turns out, once I get a laptop to change the megatune settings, with luck i'll post up a vid.

    electrical questions quick!

    in MegaSquirt

    Posted

    Ok,l I've got the dash apart installing a new shift light (video and pics by next week) I have one problem. I need to find a 5 volt power source. where can I find this source? I also have a 12 volt source going to it. Can I just add a resistor? what resisitor?

    Fire! Good time to go to MS?

    in MegaSquirt

    Posted

    first I would suggest taking the block apart and checking to see if the fire warped anything. Or, just grab yourself a new engine. Secondly.. yeah the megasquirt could be a great upgrade right now, especially if it's done right.I'm not sure if anyone else on this board has done a 300zxt? SOunds like a fun project.

    The knock sensor

    in Ignition and Electrical

    Posted

    On my 82 zxt, I've got a knock sensor right behind the alternator on the black. Since I'm running megasquirt, it's not hooked up. How does a knock sensor send a signal, and what would be a good way to test it? SHould I just try to find another sensor that fits?

    Location of IAT?

    in MegaSquirt

    Posted

    I'm going to agree with 73turbo240z... if you've got that before the turbo, it's definitely in the wrong place. You need to be measuring the air going into the cylinders, which is a lot hotter than the ambient. IF it doesn't run right.. that's in the tuning, not the sensor placement.

     

    From the megamanual:

     

    Note: A few early installations using the open-cage MAT sensor experienced vibration induced failure of the sensor. The thermistor bulb is supported only by two thin wire legs. These can apparently fatigue and break when installed in high vibration environments, such as occurs when you screw it directly into an intake manifold. Several people solved the problem by "potting" the legs of the thermistor with O2-sensor-safe silicone (most silicone sealer/adhesives destroy O2 sensors, so pay attention!), squeezing it down inside the sensor body but leaving the bulb exposed.

     

    IAT sensor - this should be located in the intake system somewhere after the compressor and intercooler. It needs to sense the temperature of the air going into the cylinders. You can put it before the throttle body or in the intake plenum, either location will be fine. Your intake temperature sensor must be the “open-element†type. Regular closed sensors are shielded within a brass housing, and will respond too slowly to the rapidly rising intake temperatures that occur when boost comes on. See the Sensors and Wiring section for more details.

     

    Just a little reading at http://www.megasquirt.info

    Newb questions, Not sure i know what to search for

    in MegaSquirt

    Posted

    1. Not sure

     

    2. The wiring of the car is completely up to you, as long as it's done :) I have my car completely rewired for the system. I used the rs-autosports kit and the MS relay board. Pretty much the only connectors that you get to work with are the one that connect to the pieces, such as the injector connectors, sensor connectors, etc.

     

    WHen it comes to the throttle body.. I believe you need a variable sensor instead of a switch type.. meaning not the stock TB and prolly a 240sx one. Someone may correct me on this.

     

    3. The MS is obviously connected to a DB-27 computer connection, which means you can't really use ony of the stock harness connectors.

    Location of IAT?

    in MegaSquirt

    Posted

    To be a little more technical on this issue.. here's some fun facts.

     

    You want the IAT sensor after the intercooler obvoiusly. The "don't install on the intake" is not always correct. The CLT sensor is on the intake and nothing's wrong with that.. :) It's really easy to place anywhere if you have a 3/4in drill, welder or even jb weld and a bung or nut that fits the pipe thread on the sensor. All up to you

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