| Slant Six Forum https://slantsix.org/forum/ |
|
| Question about voltage regulators https://slantsix.org/forum/viewtopic.php?t=30123 |
Page 1 of 1 |
| Author: | rebel_cat68 [ Mon Jul 21, 2008 1:20 pm ] |
| Post subject: | Question about voltage regulators |
Hey there. Before I read "daddanjer"´s topic from March"registering discharge" I had come to the same conclusion that I would have to replace my voltage regulator. The old one being Echlin VR-38, and the new one being a genuine Mopar replacement regulator P4529794. But when I read the old topic where "SlantSixDan" suggested a Standard-BlueStreak VR-128 or Echlin VR-1001 I started wondering. Will any regulator do? Or are there differences in different regulators? |
|
| Author: | SlantSixDan [ Mon Jul 21, 2008 2:29 pm ] |
| Post subject: | |
VR38 is for the '70+ dual-field alternator. VR128/VR10001 is for the '60-'69 single-field alternator. The MP items are not of good quality. |
|
| Author: | Joshie225 [ Mon Jul 21, 2008 2:38 pm ] |
| Post subject: | |
That P-part genuine Mopar regulator killed one battery in my Dart before I threw it away. What symptoms led you to believe you need a new regulator? |
|
| Author: | rebel_cat68 [ Tue Jul 22, 2008 2:15 am ] |
| Post subject: | |
I tried both voltage regulators on my -73 Valiant and found out that my 12 year old Echlin only puts out 13,6V when the new MP gives 14,5V. I've had problems with my 2 year old battery being emptied a couple of times last summer in my -70 Duster, so that's why I bought a new regulator and tried them first on the Valiant. And there's more gremlins in the electrical system so I will start a new thread. |
|
| Author: | KBB_of_TMC [ Tue Jul 22, 2008 9:00 am ] |
| Post subject: | |
Be aware that electronic regulators can fail in ways other than either no or max charge; sometimes, they can fail slowly or intermittently and allow the set point voltage to drift up or down over time. I removed the potting from the last regulator and found that a power resistor was half burned away - it slowly raised to voltage to about 14.8V and fried my battery before I realized it. |
|
| Author: | rebel_cat68 [ Wed Jul 23, 2008 1:49 am ] |
| Post subject: | |
What voltage-area is considered to be the best? I've thought it's between 13,8 and 14,5. |
|
| Author: | KBB_of_TMC [ Thu Jul 24, 2008 11:19 am ] |
| Post subject: | |
The optimum battery charging voltage is a source of some debate; it depends on the type of battery and its temperature. You might want to look at http://www.landiss.com/battery.htm ; however, in common practice, the decrease of the desired voltage with temperature is nearly comparible to the acceptible range. That means you could get by with a simple constant voltage over most of the temperature range; the regulator can't know the battery's temperature anyway and must just use its temperature. Personally, I don't worry if the voltage is between 13.4 & 14.4V as I use conventional batteries (I'm not convinced that spiral-cell are really cost effective due to their short warranties; if the manf.'s really believe they'll last 10X conventional, how come their warranties are no better?). When my regulator failed my ammeter showed ~10-15A charging when the battery ought to have been totally charged up; I measured 14.8V at idle; and it totally killed my Diehard group 27 battery within the 40 minutes or so it took to drive home. |
|
| Page 1 of 1 | All times are UTC-08:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|