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mygreenbus
Samba Member
Joined: February 14, 2007
Posts: 1154
Location: Palm Coast, FL
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 Posted: Mon Oct 29, 2007 4:41 am Post subject: |
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| renobdarb wrote: |
| If you get that VDO tach make sure you get the $.02 diode from Radio Shack. Your tach will bounce all over the place without it. |
Which diode??? |
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Randy in Maine
Samba Member
Joined: August 03, 2003
Posts: 34890
Location: The Beach
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| Posted: Mon Oct 29, 2007 5:22 am Post subject: |
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This one. Although not everyone apparently needs it to prevent "stray voltage" from disturbing the gauge readings. Mine fluttered even before the compufire. I installed mine at the coil end.
From the VDO FAQs over at e-gauges.com.....
"Will VDO tachs work with points ignition or Pertronix?
Answer: Yes, with diode in line on the signal lead. Instructions are as follows:
Purchase a diode #1N4005 from a local electronics store such as Radio Shack or Circuit City. Cut both ends of the diode so each is approximately 3/4” long. Crimp 1/4” female spade connector on the end of the diode with the silver band. Crimp butt-splice connector on the other end of the diode. Crimp the opposite end of butt-splice connector to the wire connected to the ignition signal source. Connect 1/4” female spade connector used in #3 above to terminal #4 on the back of the tachometer. Connect a ground (-) wire to terminal #3. Connect a switched 12-volt power wire to terminal #2. Set switches for appropriate amount of cylinders." |
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renobdarb
Samba Member
Joined: September 13, 2005
Posts: 878
Location: Eastern Idaho
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| Posted: Mon Oct 29, 2007 10:05 am Post subject: |
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You only need it if you're running Petronix or Compufire? Ahhhh... That would explain why not everyone needs it...
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1978 Campmobile, 2000cc w/hydro lifters, dual Weber 44 IDF carbs (50 idle jets, 115 main jets), SVDA distributor w/Compufire. |
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Loftus
Samba Member
Joined: April 08, 2020
Posts: 24
Location: Burlington, Ontario, Canada
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| Posted: Sat Jul 18, 2020 9:42 pm Post subject: Re: tach |
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| neil68 wrote: |
Glenn,
Another option: I pulled a VDO tach out of a BMW a few years ago (at the wreckers) and it fit perfectly in my '69 bus, where the stock clock would have been located (the bus came with just the blank plate). I don't remember what type of BMW it was, however.
Neil. |
Installed a VDO tach into my 71 bus dash which was pulled from a BMW 2002 (1969). The 1968->1971 BMW 2002 also came with "Silver Dollar" centers on the gauges much like our bus did during the same years. The BMW colour scheme of silver center with black gauge face matched what I was going for.
Looks close enough to me and only cost me $40 CDN at a wreckers. I thought about the CIP1 tach but they dont carry the tach with the silver center with black gauge face.
My dash with Black-Silver theme using BMW tach
Stock BMW 2002 cluster pulled from a 1969 for comparison
_________________
71 Bay Deluxe with Type IV 2.0 hydro motor: Porsche fan, 44x38 valves, Fat Performance Cam FC442HYD, with early CIS fuel injection. *Currently rebuilding and changing to solid cam and lifters* |
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