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  1. BeastMaster

    86’ 6.9 tachometer rewire

    I believe the motor/pointer of our tachs is of an air core moving magnet design, likely driven with a custom IC. Here's a generic driver IC: PDF LM1819 Air-Core Meter Driver - Digi-Key https://media.digikey.com/pdf/Data%20Sheets/National%20Semiconductor%20PDFs/LM1819.pdf The mechanics of...
  2. BeastMaster

    Glowplug issues

    The eichlin GPR200 I got from NAPA is made in Mexico. Do they really use aluminum for contacts these days? ......... NAPA Echlin designs, specifies and manufactures engine management products with only one goal in mind: to make them the very best. This philosophy reflects the ongoing...
  3. BeastMaster

    86’ 6.9 tachometer rewire

    Very interesting! Nextion HMI displays? For now, I am doing thermocouples - up to sixteen of em - and magnetic cores - where I have them in a resonant oscillator, and am looking for the permeability shift when I ram amperes of DC current through the center of the core. Intent is to measure...
  4. BeastMaster

    Sad (sort of funny tho)

    Count your blessings! In the corporate world, he's likely your boss! He looks good in suit and tie, has good "people skills", gives good first impressions and hand shakes. Knows and socializes with the right people. And doesn't know squat about anything else. And you find yourself ordered...
  5. BeastMaster

    86’ 6.9 tachometer rewire

    Did you want the photo of four alligator clips on the pins? I am designing some Arduino stuff for my van...and this thread caught me while tinkering with the gauge cluster circuits. What I'm after is something to measure glow plug current, monitor temperatures, and make intelligent glow plug...
  6. BeastMaster

    86’ 6.9 tachometer rewire

    My tach only has three wires...key on power (+), ground (-), and tach sensor ( S, returned to ground. ) 3.226 Khz = 4000 RPM on mine... It may be wrong, as calculated to be 3.533 Khz. Signal generator is old Android phone loaded with...
  7. BeastMaster

    Glowplug issues

    It's been my suspicion that the earlier bipolar NPN transistor technology was susceptible to alternator load dumps and starter motor voltage spikes. A power transistor damaged in this manner will short emitter to collector...permanently on. Where the later MOSFET technology usually avalanches...
  8. BeastMaster

    Glowplug issues

    Speaking of glow plugs, anyone had the experience of a glow plug relay failing welding itself ON? That is failing to open the battery circuit at end of cycle, causing all the glow plugs to burn out? I hope the NAPA Eichlin I just bought won't let me down.
  9. BeastMaster

    in need of a radiator

    My local radiator shop recored mine. Re-used the end bells. I am so old tech mine came apart with solder. It came out similar price to aluminum. He sent the old core back for copper value. The old core was quite brittle from work hardening. It was falling apart as he was removing it. May...
  10. BeastMaster

    Cold advance/high idle drop in power when switching to low idle

    Does the glow plugs cycling cause the same kind of upset? On my E350, the glow plug draw is noticeable on voltmeter, but does not affect engine RPM. The cold advance seems to have no effect on voltage, but the engine changes it's sound a bit. Usually about two or three minutes after start
  11. BeastMaster

    Cold advance/high idle drop in power when switching to low idle

    Whatever is jumping on his electrical system is huge, judging by his description. Does the volt meter confirm this? Does this drag the battery buss down like glow plugs and starter motor? Sounds like 1000A or so for half a second? There's enough there to flat blow open most shorts. With...
  12. BeastMaster

    Cold advance/high idle drop in power when switching to low idle

    I note my engine sounds smoother after cold idle times out. No electrical anomalies noted. Is it possible some sort of noise spike ( inductive kickback ) from the cold advance solenoid is retripping a glow plugs cycle? But then your air conditioner clutch should be wreaking havoc. Just a...
  13. BeastMaster

    To continue project or??

    FlexSeal?
  14. BeastMaster

    Oil pressure sensor help

    Most I have seen in that form factor are designed to feed a computer. They run from 5 volts. Many are ratiometric, meaning the output also tracks supply voltage. Inside is usually a balanced differential strain gage, with a differential amplifier chip to amplify it's millivolt output to...
  15. BeastMaster

    To continue project or??

    IDIoit, I really love to see people make things like this...to me it's functional art. Thanks for posting that...it's an inspirational photo for me. I am still at the stage of figuring out how to re do the dashboard on my van. I want to build a "Back to the Future" style contraption and mix...
  16. BeastMaster

    To continue project or??

    Once I adopt something, I try like all get out to keep it. I know that thing inside and out. And it's that knowledge that I have invested so much time to acquire that is so valuable to me. The thing I have is just the physical expression of what is in ME. You are gonna spend resources no...
  17. BeastMaster

    Looking for a continuous duty solenoid/relay/contactor

    Hmmph...did not leave you much evidence. I was expecting failed coil. A coil designed for intermittent duty run continuously should have heated up, eventually charred, the winding insulation fail, massive internal winding short, then excessive coil current, glowing windings, until oxidation...
  18. BeastMaster

    Looking for a continuous duty solenoid/relay/contactor

    What fails...the contacts or the coil? DC Continuous duty coils are more expensive to make than intermittent duty coils. Thermal considerations.
  19. BeastMaster

    Maybe a 911?

    RunAway... I get idea a Halon or co2 based fire extinguisher oughta work well for this... especially if the air intake is hard to get to and seal off properly. I know welders have tanks of nonflammable gases around for shield gas. Have to dispense them pretty fast. Some theatrical people use...
  20. BeastMaster

    Maybe a 911?

    Glow plugs good and powered? I'm in for hard starts if my glow plug circuit isn't working right. Very happy to rule out frozen engine!
  21. BeastMaster

    Maybe a 911?

    Check the grounding. Probably easiest done by looking between starter frame and battery negative with a volt meter. If you see any, you probably have a corroded connection. Make sure that 12 volts makes it to the starter, and gets back to ground on the other side. Brand new starter...if it...
  22. BeastMaster

    LED Bulbs

    Hope you post back if those things last. To me it's a PITA ( Pain In The Ass ) to disassemble the dash to get to them. I want to update a lot of stuff, but merely getting to it overwhelms me. I am quite ignorant of how a lot of it goes together, and it's better if I left it alone. When...
  23. BeastMaster

    LED Bulbs

    Yeh.. I bought a lot of cheap Chinese automotive marker LED lights. All hermetically sealed, etc, and came in colors. Red, blue, green, yellow, white. Rated 10watt. I thought these were that standard round 9 die design. 3 parallel strings if 3 die. Commonly used for 10 Watt LED chips. In...
  24. BeastMaster

    LED Bulbs

    If they are trying to get ungodly brightness from tiny die, they won't last for long. But damn near everyone does it. It's just the way we think these days. Short term. Maximal return. Enforced obsolescence. So the customers buy more. I end up buying raw chips...the ones I solder in...
  25. BeastMaster

    Maybe a 911?

    I was going on this. Sometimes water gets in, followed by rust, and locks things up. Hope it's the starter. I've had mine go too, even one that eventually failed shorted and made it appear my engine was locked up... But it was apparent the engine was ok, I could turn it with a wrench. I...

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