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e_racer1999

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Posts posted by e_racer1999

    Megasquirt fan control using the fast idle relay on relay board

    in MegaSquirt

    Posted · Edited by e_racer1999

    FIdle WILL power your relay. I believe it's one of the few (if not the only) port that doesn't require a transistor to directly control a relay.

     

    Note that the LEDs, FIdle and IAC1,2 outputs already have transistors capable of conducting considerable current (check the transistor datasheets to be sure they are sufficient for your application). The LED(s) can be removed and the LED holes on the PCB can be connected to a spare DB37 port. If you use the LED connections, note that you will bypass the current limiting resistor. Be SURE your device limits current itself (i.e., that it has a resistance of 50 or more Ohms). If it doesn't, you will have to add a resistor in series with the device. You connect the device (relay, etc.) to the LED hole closest the DB9 connector (which you can jumper to a spare pin on the DB37 to route it externally).

     

    yadda yadda yadda

     

    Note that the FIdle circuit on the relay board is limited to 1.1 Amps by the polyfuse. The relay is capable of handling much more current, but the traces on the relay board are NOT. If you wish to use the FIdle relay, do not use it to drive a device that requires more than 1.1 Amps (though you can use it to drive a second relay and control much more current - like an electric fan relay)

     

    Electric Cooling Fan Control Another example is electric electric cooling fan control. We will turn it on 180°F and off at 170°F, using the relay board FIdle output to control a separate cooling fan relay (the traces on the relay board may not have enough current capacity to control your fan directly):

     

    * FIdle (PM2)

    o Port PM2, FIdle enabled

    o variable = coolant > threshold = 180, hysteresis = 10,

    o AND

    o variable = rpm > threshold = 450, hysteresis = 10, (fan will not run while cranking - you can add any second condition that works for you, of course)

    o Power-on value = 0

    o Trigger value = 1

     

    Of course you can change the conditions to suit your vehicle.

     

    Note that changing the FIdle port settings (PM2) does not affect the operation of the stepper IAC settings and ports. You can still use the IAC stepper functions for controlling idle speed during warm-up (just select one of the stepper options for idle control).

     

    Note that the settings will depend on whether you have an NC (normally closed) or NO (normally open) relay, so you must check that the fan works as you think it should.

     

    Other conditions could be used to drive a nitrous solenoid, a shift light, or a water injection system, for example.

     

    This won't cover every condition people can think of, but it should be easy for people to add more code for custom applications.

     

    And yes, it's pin 30.

    Methanol Tank Mounting

    in Fuel Delivery

    Posted

    Sorry for the lack of update. I have yet to get the motor in the car (going to put it in this weekend hopefully so I can start mocking stuff up and get the IC piping and exhaust fabbed up, as well as get the placing of everything in the engine bay figured out). As for the lines, I was thinking something exactly as Bob is describing; since it's on the "cold" side of the engine I should have ample space to run the lines without interference.

    Stock Turbo Clutch Question

    in Drivetrain

    Posted

    "Stock" is a loaded word. Is it a Nissan part? Exedy? It's very difficult to determine how much a used clutch will hold, but the brand of the clutch disk and pressure plate will probably have some bearing on how grippy it will be.

    Methanol Tank Mounting

    in Fuel Delivery

    Posted

    I'm very close to dropping the motor in, so soon I will be able to take measurements and test fit in the engine bay. I've got the battery tray 90% out; decided to cut and grind vs drill out spot welds because I don't have a 90* drill attachment. Took a couple measurements and it looks like it will baaarely fit in the battery location. Will post results.

    WTB: Electric Fan, BRE front spoiler, 255Lph fuel pump, Fender Mirrors

    in Parts Wanted

    Posted

    they dont make a direct bolt on B.R.E. air dam for the 280z... so Im going to have to make it fit anyway.

    http://www.thezstore.com/page/TZS/PROD/7AD1/50-1569

    Description:

    To all of our 260Z & 280Z owners who have asked for a BRE-Style Air Dam for their Z's, thanks for your patience, your wait is over! This impressive hand-laid fiberglass air dam was designed to match the look of the early Z BRE-Racing style body parts, and attach directly to your stock front valance. The air ducts were designed to flow towards the front brakes for cooling, and are ready to accept your custom ducting for racing-type close-directed brake cooling flow if you choose. Comes with protective gel-coat, ready for prep and paint. We hope to have an installed image soon!

    OK - so I got this diesel motor....

    in Nissan L6 Forum

    Posted

    How do you know that those ld-rods are cast and not forged like the gas-rods?

    Those ld-rods have to handle great forces in a low rpm and the piston is also much more heavier than the ones in a gas engine. I would say that those ld-rods are stronger than gas-rods.

    But that is just my opinion and I have those ld-rods in my N42 L28 with custom forged pistons.

    The R/S ratio is now 1,77.

    For one I don't KNOW that the rods are cast, I just thought I read that they were cast, hence the If I Recall Correctly. Also IIRC, Nissan forged the rods because it was more expensive at the time to cast for some reason. I could be way off base, but that's how it goes when I think I think I read something somewhere :)

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