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bawfuls last won the day on February 13 2019

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  1. Spent a couple hours on this again today for the first time in awhile, because this week the headlights stopped working all together, even on the high setting. I verified continuity on the ground side of things (headlight sub-harness to the white C-9 six-pin connector, from there to the combo switch, etc). Now I'm getting a symptom I saw previously (I think, maybe 8 months ago, hard to remember), which is full battery voltage (13.6V with the car on) at the middle (fatter) connection on the headlight sub-harness when the headlight switch is on the HIGH position (no voltage when off
  2. Perhaps I will eventually, but the 5 battery modules I've got in it now were 40% of my total project budget. And with the voltage range of the motor I've got, I can't just add one or two, I'd have to add another 5 in parallel. So for the time being, this is it. I could have designed it originally to split the pack, with say 3 in the rear and 2 up front, but for simplicity I decided against that.
  3. Update: flywheel measured at 0.4 grams out of balance, i.e. just fine. Reinstalled everything this afternoon an behavior is as before. So, if it's not the flywheel, and it's not the transmission, best guess is it's the alignment of the motor and trans shafts (as has been suggested). I need to head over to the EV speed shop this Wednesday anyway to corner weigh the car so I'll pick their brains about it then.
  4. I was out of town all last week so I'll have to go pick up the flywheel today and see what they say. Will update this afternoon or evening.
  5. I took the flywheel assembly back to the shop to have them re-check it's balance. They will take pics/video of the readout for me, and if it's still balanced I'll owe them $45, which seems worth it for the piece of mind that the flywheel assembly is NOT the issue. If this comes back balanced I am really out of ideas here.
  6. Alright so I just did this, outside in an empty parking lot, with the handbrake on and the transmission in 5th gear. Car did not lurch at all, and there was no burning clutch smell, so the clutch appears to be disengaging properly. The vibration was still there at higher RPM just as before. Sure is starting to feel like it's still the flywheel/pressure plate assembly after all, as you suggested. Should I take them back to the same shop and have it re-checked? They will surely do it for free, since they are the ones who potentially screwed up. Or should I take it to a n
  7. That alignment is determined by the location of the holes machined into the red adapter plate. So I am relying on the company I order that from to have done their job properly. They sell these kits for a wide variety of cars, and there’s an EV conversion shop up in NorCal with a YouTube channel (EV4U) who recently used their kit for a 1978 Z without issue, but it’s certainly possible mine is misaligned slightly. I should have (but did not) verified the alignment with a laser or string when I first got it and test fit: Today I will try the test NewZed posted in bold and
  8. Yeah I could go back to the shop that balanced the pressure plate and have them check it again. I guess I could request they put it on the machine while I watch and see the results? I agree though, it does seem odd that a brand new in-stock-at-AutoZone pressure plate would need that much modification to balance. The other reason I'm skeptical that the flywheel is the issue is because when I decouple the transmission and spin the motor up with the flywheel assembly still on it, the vibration issue goes away. That strongly suggests to me the problem is in the transmission, or the int
  9. UPDATE: I took the Z over to a local transmission shop this morning. Showed them the problem, they said they'd do their standard diagnostic for $95 and 90 minutes. 3 hours later they call me to come pick it up, and they didn't charge me because they couldn't figure out what the issue is. Their only suggestions were flywheel-clutch-pressure plate imbalance (though I told them before and after that I'd just had them balanced), or put a counterweight on the auxiliary front shaft of the motor. I showed them the video of the transmission input shaft wiggle, they said that's
  10. I inspected that stuff when I had the motor out yesterday and didn't see anything that looked off. Sure it's possible something's wrong there, but I'm skeptical that's the primary source of this vibration.
  11. Ah I see what you're saying. If that were the issue, shouldn't things behave with the clutch pedal pushed all the way in? Likewise, if the collar is too tall and the clutch is partially disengaged at rest, wouldn't I experience it slipping if I accelerate hard from a stop? Since this is an electric motor remember, we can let the clutch engage at a stop, and just dump the throttle. I have done so in first and second gear several dozen times on this setup and never felt the clutch slip. If anything, the driving experience suggests the opposite issue; the clutch feels lik
  12. I... don't know? I got a Duralast clutch kit from Autozone that's supposed to be for this car. The throw out bearing that came with it looks just like the one that was in the transmission when I got it, and seems to fit on the existing collar just fine. How can I verify it's the right one?
  13. I agree it's weird I've had to do so much, which makes me think it's not the flywheel/pressure plate. Yeah the transmission shaft is right on the axis, but if it's being allowed to wobble/move off axis, that would induce a lot of vibration by moving a lot of mass attached to it further out. I don't know, maybe I'll take it to a local transmission shop to have them listen to the noise at least. I'm running out of ideas for what else it could be.
  14. I agree it's certainly possible the shop screwed up. But I disagree that the electric motor is exposing small imbalances that would otherwise go unnoticed. The vibration is severe at high RPM, and even with a gas engine it would surely be very noticeable above 5000
  15. Reinstalled motor after grinding down the transmission input shaft at least a 10th of an inch, still get the same vibration as before. At least I'm getting pretty good at pulling/installing this motor, took 30 minutes to get it back in this time!
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