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Hot Rods 6 volt dash to 12 volt system help

Discussion in 'The Hokey Ass Message Board' started by subneil56, Feb 18, 2019.

  1. subneil56
    Joined: Nov 13, 2009
    Posts: 140

    subneil56
    Member
    from bristol vt

    ok here i go running a1951olds dash cluster which i believe to be 6 volt im trying to get the right water temp sending unit for the 371 olds which is going to be running a 12 volt system. so my question do i get a 6 volt sending unit ?
     
  2. 302GMC
    Joined: Dec 15, 2005
    Posts: 6,898

    302GMC
    Member
    from Idaho

    12v '53 - '55 Olds or Cad ..
     
  3. BJR
    Joined: Mar 11, 2005
    Posts: 6,993

    BJR
    Member

    The senders need to match the cluster. Then use runtz voltage reducers to drop the voltage to the cluster. Don't use one on the amp gauge.
     
    1oldtimer and Pist-n-Broke like this.
  4. Yes, as BJR said. Factory sender for the gauge no matter the brand of car. Then a volta-drop. I like the Runtz as well as the Ford or Mopar units. Few know that several makers stayed 6-V on the gauges long after the charging systems went 12-V.
     
    Nailhead Jason likes this.

  5. subneil56
    Joined: Nov 13, 2009
    Posts: 140

    subneil56
    Member
    from bristol vt

    thanks for the info
     
  6. BJR
    Joined: Mar 11, 2005
    Posts: 6,993

    BJR
    Member

    oliver westlund likes this.
  7. Try this, Amazon and inexpensive.

    drok.jpg
     
    TS057 likes this.
  8. Stooge
    Joined: Sep 9, 2015
    Posts: 480

    Stooge
    ALLIANCE MEMBER

    i used this voltage regulator on my last truck to drop the 12v down to the 6v shoebox ford cluster I was using. worked well and was easy to use having the outputs all in one terminal block, but I think it might have been a hair cheaper when I bought it a few yrs ago. i only bought from him the one time, so i cant say if anything is different between now and then.
    https://www.vintageautogarage.com/12V-6V-VREG-Oil-Gas-Temp-Gauge-Voltage-Reducer-p/vreg06703.htm

    he has a few other ones, but the one linked above is what I used
    https://www.vintageautogarage.com/Voltage-Reducers-Converters-s/2959.htm
     
  9. BJR
    Joined: Mar 11, 2005
    Posts: 6,993

    BJR
    Member

    So spend $60 or spend $9 to build 3 reducers for 3 gauges. Traditionally people built stuff for their cars. Now they just write the check.
     
  10. Stooge
    Joined: Sep 9, 2015
    Posts: 480

    Stooge
    ALLIANCE MEMBER

    Assuming that was directed at me, if it makes you feel any better, it was being used in a dash and console that i built from scratch, (and painted by me) using flat sheet metal shelves that were being scrapped at work...but i guess i had to use money to buy the paint so i dont know if it counts
     

    Attached Files:

    BJR likes this.
  11. I used all original 6V gauges and senders on my Ford and GM cars with 12 volts. For the feed for the gauges, I bought an original 65 Ford pickup voltage "limiter". 12 volts in, 6 volts out and you only need one for all the electric gauges in the dash.
     
    oliver westlund and Blues4U like this.
  12. BJR
    Joined: Mar 11, 2005
    Posts: 6,993

    BJR
    Member

    It was more of a general statement of how it seems to be today. No malace was intended.
     
    Stooge likes this.
  13. Stooge
    Joined: Sep 9, 2015
    Posts: 480

    Stooge
    ALLIANCE MEMBER

    It was a few yrs ago so i forget what my exact reasoning was for using that reducer over using the runtz ones like i had been planning, but i assume i was trying to simplify or thought i was going to have some problem with integrating the 12v negative ground of the rest of the truck to work with the 6v positive ground ford gauges i used.
     
    BJR likes this.
  14. subneil56
    Joined: Nov 13, 2009
    Posts: 140

    subneil56
    Member
    from bristol vt

    Where would I find a sending unit for that 51 olds dash ? Looked on e bay no luck ?


    Sent from my iPhone using The H.A.M.B. mobile app
     
  15. TS057
    Joined: Apr 10, 2012
    Posts: 64

    TS057
    Member
    from Fargo, ND
    1. shoe box hambers

    I bought this Chinesium unit off eBay. I wanted to go the Ford regulator route but couldn't find one for whatever reason. Anyhow I ran all the gauges in my '51 Shoebox off the one unit. I also bought a 30A unit that runs the solenoid on my overdrive and they both work great.

    DC 12V 24V StepDown to DC 6V 10A 60W Waterproof Power Converter Regulator DC/DC https://ebay.us/TspZX9
     
  16. oliver westlund
    Joined: Dec 19, 2018
    Posts: 775

    oliver westlund
    Member

  17. BJR
    Joined: Mar 11, 2005
    Posts: 6,993

    BJR
    Member

    from this info it looks like any GM sender up to 64 will work.
    Sending units ohm range.png
     
    Last edited: Feb 23, 2019
  18. Neil, there is a old store in Mass. that may have a sending unit. PM F&J, he knows the fella. Or, try Fusick. I have a couple units but they are stuffed in storage and out of sight.
     
  19. subneil56
    Joined: Nov 13, 2009
    Posts: 140

    subneil56
    Member
    from bristol vt

    Thanks Walt talked to frank yesterday he gave me his name and number he has been out of them for a couple years . Any other leads I’m getting real close to starting here up.[​IMG]


    Sent from my iPhone using The H.A.M.B. mobile app
     
  20. F&J
    Joined: Apr 5, 2007
    Posts: 13,223

    F&J
    Member

    Neil, Look at post # 17 from BJR...his chart shows they are same as GM up to 1964." 0-30 ohm. "

    I might have used ones from 53-56 Olds ... if you can't get one at local auto parts stores. New would be better, call around.
     

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