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wrljet

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Everything posted by wrljet

  1. wrljet
    But that also would have a coolant smell associated with it. Bill
  2. wrljet
    Maybe a stupid comment, but a very common reason in all cars for windshield condensation is a leaking heater core. Bill
  3. wrljet
    Anybody know the exact algorithm used for when the key is held captive and when it's released? Bill
  4. wrljet
    The reasons are exactly as I posted earlier. The alternator gives better output at lower engine speed because the alternator can spin faster without blowing up physically, than could a generator, due to the lack of the segmented commutator, and thus is geared higher. This is THE primary reason for their use. (and, today, they are loads cheaper) They became feasible for general use when silicon rectifier diodes got cheap enough in the early to mid '60s. A generator may use permanent magnets to bootstrap the system but there is a still a field winding, as that is how the regulator controls the output. Same as in an alternator. For the people who don't want to believe alternator output is not as high at lower RPM, see this output graphs about halfway down this page: http://www.delcoremy.com/Alt24SI.aspx (note though, the graph shows alternator RPM, not engine RPM, you'll have to correct it for the gear ratio in your particular application. The alternators discussed on that page have a max speed of 12,000 RPM. So, if hooked, say, to a 911 with a 7000 RPM redline, it might be geared about 0.6:1. So at 2000 RPM alternator speed on the graph the engine would be spinning 1200.) Bill
  5. wrljet
    That's not entirely accurate. Alternators do a much better job of charging at lower engine RPM, simply because they are geared higher and spin faster than generators did in the good old days. The commutators in generators could not survive very high speeds, and thus were geared lower so they would not over-speed at the highest engine speed. As a result their output at low speeds/idle was poor. Alternators do much better, but they do not generate as much power at idle as they do at even slightly higher RPM. Bill We seem to have gone way off topic .. but I enjoy a good old fashioned debate ;) In your last statement - are you comparing an alternator vs a generator at higher RPM as I'm confused with what you are saying? Or you are saying that an alternator does not generate equal power at idle than at say 1500RPM ? If so, then I have to disagree.. lol.. Yes, it does not give the same output at idle as 1500 rpm. Disagree all you like. Bill
  6. wrljet
    That's not entirely accurate. Alternators do a much better job of charging at lower engine RPM, simply because they are geared higher and spin faster than generators did in the good old days. The commutators in generators could not survive very high speeds, and thus were geared lower so they would not over-speed at the highest engine speed. As a result their output at low speeds/idle was poor. Alternators do much better, but they do not generate as much power at idle as they do at even slightly higher RPM. Bill
  7. wrljet
    The DME ECU (along with some other components) is considered mission critical and as such is designed to operated quite a lot supply voltage. During cranking (with a weak battery) the voltage at the ECU can be much lower than 10V and still be expected to operate. This isn't the case for most of the other electronics in the car, and thus takes an easier and cheaper design requiring closer to the nominal voltage to function. That's why the car didn't quit running. Bill
  8. wrljet
    No, the original battery was weak. The remote worked but the range was poor. The new Duracell DL didn't work. Its voltage dropped off considerably when the button was pressed. I assume it was just no good from the manufacturer. The package was dated and not old. A new Energizer CR from a different store worked. Much less drop. Bill
  9. wrljet
    Many people notice a hot smell from rubber particles from the tires that have worn off and been thrown back onto the mufflers or heat shields. I get this smell very noticeably more when stopping immediately after having roared through some of my favorite twisties. But this smell is very clearly a tire rubber smell and no confused with oil or coolant. Bill
  10. wrljet
    CR2032 is the correct battery for mine. Is that with or without the resistor? I had trouble with one of my remotes once, and it was a battery problem. New DL2032 didn't work. CR2032 did. Bill
  11. wrljet
    Mine (2002) looks like that one. Bill
  12. wrljet
    This is a 1999 996 cab, so one button is for the hard top. Danny Ahh, mine is 2002, so different remote. I'm an EE also, and w/o having seen anything other than your photo and post I would agree, a resistor from emitter to base makes more sense. And generally caps in that small size are tan/buff color and are not marked. Bill
  13. wrljet
    What year car is that remote from? The ckt board in mine has almost nothing on the pushbutton side. 99% of the circuitry is under the battery holder.
  14. wrljet
    And that weight is up high!
  15. wrljet
    If the crank is off center, the seal won't seal. That's why the sent those tools to the dealerships, and why the motors are/were replaced. But the flywheel isn't *slipping*.
  16. wrljet
    Wow, that was quick, thanks. No, not trying to put one in an older car, just part of my on-going reverse-engineering project(s). I got one from a junkyard to get a hold of the an RFID transducer coil. Do you happen to know if the RFID capsules in the 997 keys work with the 996 electronics? They physically look different. Bill
  17. wrljet
    Can anyone post or send me a scan of the wiring diagram for a 997 or Cayman ignition switch? I'm looking for the pinout for the 16-pin connector on the ignition key/lock module 997.618.161.01. Thanks, Bill
  18. wrljet
    The 996 motors are made in Japan?
  19. wrljet
    Yes, but their feeling probably is that it's a violation of Federal laws to reprogram any aspect of the DME w/o all your ducks lined up in a row. One of the TSBs includes some number of the DME codes, which appear to me to follow some sort of pattern. So I think they might be generated from an algorithm other than just a random number. I wonder if they are generated from the VIN? Bill
  20. wrljet
    Does the factory give out the 6-digit hex DME programming code associated with your VIN w/o a "good" reason? Bill
  21. wrljet
    Is there any chance you can get me the part numbers off the five connector shells that mate with the DME 7.8 controller? Thanks, Bill
  22. wrljet
    I went to sign up for an account and don't see USA in the list of countries.
  23. wrljet
    One time back in the early '80s I had an ancient VW Bug in Syracuse NY winter. Started up cold you could carefully let the clutch out in neutral and the thick oil in the tranny would drive the car. Bill
  24. wrljet
    The cables are (at least on a 2002) metric 35.0 , which is the cross sectional area in mm^2. The closest AWG size is #1, which is a bit larger. Bill
  25. wrljet
    Mother, what MY car are you working on? Bill
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