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TomoHawk last won the day on March 13 2016

TomoHawk had the most liked content!

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About TomoHawk

  • Rank
    1978 280Z (stock)

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  • Gender
  • Map Location
    NorthCoast, Ohio
  • Occupation
    scientist/chemist/computer prog/ I.T. Instructor

My Z Cars

  • Interests
    Classic rock Music, Yacht Racing, sports cars, cycling, and GOD
  • About My Cars
    Mostly stock and original.<br />
    <br />
    1972 Ford Escort RS 2000 (sold to collector)<br />
    1976 Mustang II fastback ( V-6, gave to cousin)

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  1. TomoHawk

    AFR-Volts Chart

    Yes, I'll be using a Narrow-band Oxygen sensor.
  2. TomoHawk

    AFR-Volts Chart

    The so-called wide-band sensors aren't compatible with Arduino electronics. If you buy one and send it to me, I might consider using it.
  3. TomoHawk

    AFR-Volts Chart

    I'm not interested in buying electronic instrumentation from Haltech.
  4. TomoHawk

    AFR-Volts Chart

    What are Wide Bands? Painted bands? Rubber bands?
  5. TomoHawk

    AFR-Volts Chart

    Thanks, but that guy's data doesn't make sense, and he says it's not correct, especially for lambda=1. He gives 0.33V for lambda=1.0 but it should be about .45V . Then says he used a wide-band controller to get measurements from a narrow-band sensor? He also needs to change the way he explains the theory of the sensor, as he says the fuel "pulls oxygen through" for both rich and lean conditions. That's why I passed this page the first time I viewed it.
  6. TomoHawk

    AFR-Volts Chart

    I would like to build an AFR meter using an Arduino board, and I would like to know if anyone has a detailed chart of voltage v AFR for a narrow-band oxygen sensor. Yes, I searched for a long while, but you guys usually have useful engine data. There are lots of chart images, but they all look like a curvey Z, so obviously, there isn't enough detail to pick out coordinates to plot in a spreadsheet. If I had a chart or table with enough detail, I could generate a formula or a lookup table. The former would be better. It's just too bad the LCD displays are monochrome, because colour would be easier to interpret while driving, I suppose I could add some colored or RGB LEDs. thxZ
  7. TomoHawk

    un sticking fuel injectors

    This sounds like a good Arduino project. The thing would pulse the injectors using 12V and a MOSFET. You could add a momentary pushbutton to start a single cycle, or a toggle switch to start continuous pulsing. Otherwise, I'd probably put some leaner through the injectors with light pressure or gravity-feed. if you set up a glass reservoir and recycle the cleaner, you could see when they are un-stuck or spraying well, then have your work pay-for itself by cleaning injectors for others. 🙂 FYI- I've been told by a few "technicians" that you can't clean injectors- you must replace them. 😠
  8. You need to add 10 to whatever number people are usually using, because Mr. K came up with the idea for the Zed in 1959! Or you need to be specific to reference the anniversary of the first American sale.
  9. The important thing for installing a flex fan would be to know the correct length of the spacer and the correct diameter. Auto parts stores are NO help; they ( their computerized parts systems) only have parts (original or compatible OE replacements) for new cars, not "old" cars, and they don't recommend putting compatible parts on cars, even if you know it will work. I couldn't get an ignition coil condensor for a 1969 Camaro or 1967 Mustang. I was told to contact the manufacturer or visit the car dealer. Can you balance the space or the fan?
  10. TomoHawk

    Legitimacy of AFR gauges

    Measuring the coolant temperature is easily done with a temperature sensor like a thermocouple or the LM35 temperature sensor. The Lm35 gives a signal in millivolts proportional to the temperature in degrees C, and you can make an offset circuit for it as well, because 0C related to 0.5Volts, or display it directly using an Arduino program. Is there a practical electronic sensor for intake manifold vacuum. That's also important for having the engine work efficiently.
  11. TomoHawk

    Legitimacy of AFR gauges

    Because using an oxygen sensor as the sole sensor for the Air-fuel ratio is like measuring tyre pressure using the temperature of the rubber tyre.
  12. TomoHawk

    Legitimacy of AFR gauges

    You are right, about the use of the multi-sensor setup, and how it's all used to get an "average" or overall fuel mix that works reasonably well, and it agrees with my opinion that just the one sensor can't do the whole job. It makes you wonder why so people put their whole confidence in just the one sensor, how there's a whole aftermarket industry that makes a LOT of profit on it.
  13. TomoHawk

    Legitimacy of AFR gauges

    They also have more than just the one oxygen sensor, in a few places, and modern electronic or digital engine controllers that make up for sensor degradation and other compromises. I see no reason why you can rely on only one oxygen sensor. to get an overall and precise air-fuel mixture determination.
  14. TomoHawk

    Legitimacy of AFR gauges

    That theory is well known, but presumes you have an engine that is working 100% perfectly and you have a 100% perfect combustion.
  15. TomoHawk

    Legitimacy of AFR gauges

    Well, since you are infinitely knowledgeable in gas analysis, explain, exactly, how you convert an oxygen signal from a narrow-band sensor to an air-fuel ratio.

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