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  1. #11
    Master Lancista Scott H's Avatar
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    Re: Lucia's Megasquirt Conversion

    Quote Originally Posted by DJ View Post
    Thanks, Scott.

    I was under the impression that the stim was only for testing the circuit build when you were building your own board.
    I think that is the initital purpose but it comes in handy if you have a problem. It makes it easy to tell if it is an MS issue or if it is the car. When I lost my ignition is when I picked mine up.

    >Scott

  2. #12
    John Allen
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    Re: Lucia's Megasquirt Conversion

    here is the temp/resistance pairs that I have for the Bosch coolant sensor:

    temp pairs for stock Bosch sensor 0280130023 FIAT
    32.4F 5480ohm
    74.6F 2150ohm
    202.0F 203ohm

    I measured this in the same method as shown in the earlier post.

  3. #13
    Site Founder DJ's Avatar
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    Re: Lucia's Megasquirt Conversion

    Thanks, John!

    Is that for the smaller sensor?
    DJ Richards
    eBay ID: classic-ricambi
    1978 Beta Coupe, Nero

  4. #14
    Site Founder DJ's Avatar
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    Re: Lucia's Megasquirt Conversion

    Answered my own question. It's the smaller of the two stock sensors and the one for which I need the info. The larger is the Thermo Time Switch (Bosch 0280130214). I can never keep them straight.

    Thanks again, John!
    DJ Richards
    eBay ID: classic-ricambi
    1978 Beta Coupe, Nero

  5. #15
    Site Founder DJ's Avatar
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    Re: Lucia's Megasquirt Conversion

    I just figured out the normal application of the IAT sensor that I've been considering (pictured below).



    It's from a 1995 BMW 740I/IL and also used in the 1997-99 Audi A8.

    The place I first found it sells it as a special add-on sensor for use in their MAF conversion for Alfa 164s. They want $50.00 for it and wouldn't tell me what it's normal applaication is. They just say it's a "generic" sensor.

    I found that I can get a Bosch unit (0280130060) for about $35.00 or a Beru (13621725323) for $16.00. I've ordered the Beru part and will report on my attempt to mount it in the cold start injector port on my Weber throttle-body.
    Last edited by DJ; 30th June 2009 at 07:05 PM.
    DJ Richards
    eBay ID: classic-ricambi
    1978 Beta Coupe, Nero

  6. #16
    Site Founder DJ's Avatar
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    Re: Lucia's Megasquirt Conversion (Scorpion #1288)

    I know this is a dumb question but here goes.

    When I first installed the Beta FI unit I decided to make a remote idle adjuster because of the proximity of the screw to the firewall, as well as the difficulty in reaching it when installed in the Scorpion. Even with the small elbow I used in the throttle-body it still came closer to the firewall than I like and I heard it tapping the firewall a couple of times during some spirited driving.

    Which brings me to my dumb question. Is there any reason I couldn't/shouldn't just tee it into the idle air controller bypass line? They are both really nothing more than "adjustable leaks" of metered intake air around the TB butterfly so it really shouldn't matter where the air from the manual idle adjuster is injected as far as I can see. In fact, I'm not even sure it needs to be "metered" air anymore with the Megasquirt setup. I don't think it does.

    Am I missing something?
    Last edited by DJ; 28th December 2008 at 02:26 PM.
    DJ Richards
    eBay ID: classic-ricambi
    1978 Beta Coupe, Nero

  7. #17
    Master Lancista Scott H's Avatar
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    Re: Lucia's Megasquirt Conversion (Scorpion #1288)

    Quote Originally Posted by DJ View Post
    Is there any reason I couldn't/shouldn't just tee it into the idle air controller bypass line? They are both really nothing more than "adjustable leaks" of metered intake air around the TB butterfly so it really shouldn't matter where the air from the manual idle adjuster is injected as far as I can see.
    As long as it is not on the same hose as the MAP sensor and the fuel pressure regulator it does not matter.

    If it were a MAF system that would be different.

    >Scott

  8. #18
    Site Founder DJ's Avatar
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    Re: Lucia's Megasquirt Conversion (Scorpion #1288)

    Thanks, Scott.

    The MAP sensor and FP regulator will be connected to the vacuum ports on top of the plenum. You do make a good point here, though. It hadn't occurred to me before but I guess I could just connect the idle adjust to the third vac port on top of the plenum. That would even be cleaner and simpler.
    DJ Richards
    eBay ID: classic-ricambi
    1978 Beta Coupe, Nero

  9. #19
    Site Founder DJ's Avatar
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    IAT mount in throttle body

    OK. Here's some pictures of the Beru 13621725323 (Bosch 0280130060) intake air sensor mounted in the cold-start injection port on my Weber "Big Throat" throttle body.

    Thoughts, comments, suggestions?
    Attached Thumbnails Attached Thumbnails IMGP2189.jpg   IMGP2193.jpg   IMGP2194.jpg  
    DJ Richards
    eBay ID: classic-ricambi
    1978 Beta Coupe, Nero

  10. #20
    Master Lancista Scott H's Avatar
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    Re: Lucia's Megasquirt Conversion (Scorpion #1288)

    I think you are good to go!

    There is enough of the sensor element in the airstream. Good idea!

    >Scott

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