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Markous

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  15. Cold weather and high charging voltage, any cause for concern?

    in MechMan Alternators and 12v Accessories

    Posted · Edited by Markous

    So here's some pictures from the coffee run i just got home from,

     

    This my voltage at rest, been sitting for 10-12 hours

    IMG_1609_zpsichuadaw.jpg

     

    Ambient temperature in my underground parking, assuming the alternator is the same temperature before starting.

    IMG_1612_zps4of0yvqd.jpg\

     

    Voltage just after starting the truck,

    IMG_1610_zps1coryixi.jpg

     

    You know it's cold when a 20 minute drive in 2nd gear (automatic, reving about 2250) and you don't even crack 60f according to the thermocouple that came with my fluke meter. I've got the tip of the probe just inside one of the bolt holes holding the alternator case together

    IMG_1613_zpsjjenwdfs.jpg

     

    Voltage just before i shut the truck off,

    IMG_1611_zpsqmdshjjx.jpg

  18. Cold weather and high charging voltage, any cause for concern?

    in MechMan Alternators and 12v Accessories

    Posted · Edited by Markous

    My batteries are a re-branded Northstar sold under the Motomaster brand name at Canadian Tire stores up here in Canuckistan they even add an extra year to the warranty for 5 years of coverage.

    They have two CCA ratings, the regular one at 0F and another at -20f which was the biggest selling point for me. Having approx. 1500 amps of cold cranking current on tap in this kind of weather we are experiencing is very re-assuring that the little 3.0L in my truck will spin over with ease, even if spends the night outside.

    NSBAGM65M_zps5497b03c.png

    Not really worried about them freezing but i have briefly given the battery blanket idea some thought, but i park underground in an unheated underground (but easily 10-20c above outside ambient) garage and do not have access to a plug in for such a thing.

    I do not know anyone personally but i've heard of folks knocking out another frost plug and running two block heaters.

  19. Cold weather and high charging voltage, any cause for concern?

    in MechMan Alternators and 12v Accessories

    Posted

    Thank you Alex for dropping some knowledge here, it is seriously appreciated ☺️?

    I'll be honest, i haven't bothered to check the VM-1 after i've been running for awhile, just want to GTFO when i get home after being out and about for a while.

    Luckily it's only supposed to get up to a balmy high of -29c here in the city today and i've got some running around to do so i will report beck with an image of a "hot" voltage after it's been running for an hour or two.

    I've got a Fluke 325 dc clamp meter i'm curious what kind of draw my system creates with these conditions, i'll throw it on for giggles and shits too.

  21. Cold weather and high charging voltage, any cause for concern?

    in MechMan Alternators and 12v Accessories

    Posted · Edited by Markous

    Took this picture the other day when the temperature was around the -30 Celsius (around -20f i think) neighborhood.

    Supposed to be in that temperature range for the next few days until the new year.

    I'd like to hear some thoughts on this from anyone in the Mechman crew.

    46934209-8E08-42EB-A4EC-B8536704FD19_zps

    This is the voltage as seen at my 2K inputs at idle (725-ish rpm) with a cold engine, system isn't running in this image, gotta let everything warm up in the cab of the truck for 10-15 minutes before i let it wang.

    It will spike briefly into the 15.5- 15.8v range for maybe a 1/4 second (just a quick red blink on the VM-1) when i listening to tunes at 2/3-3/4 volume and above.

    My 2k hasn't had any high voltage protection issue's (supposed to engage at 15.5v give or take 0.2-0.3v AFAIK) but i'm curious if anyone else has this (non?) issue?

    Not sure if this will have a long term negative effect on my three NSB AGM batteries?

     

     

     

     

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