 How to wire the tach on an MSD, can't find the thread for a friend |
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| brant |
 Jan 20 2010, 09:45 AM
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914 Wizard  Group: Members Posts: 12,005 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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A really great member of the teener community called last night
he has done more good things for more people, but last night had a question It was around trying to get his tach to work on his -6 conversion I remember many threads about not requiring a MSD tach adapter, but couldn't find them in my searches. Can anyone point me along or offer their knowledge to help out ? specifics: 2.7/6 CDI died a few months ago. MSD was installed, and car runs well. Tach is now not working however. He is running an MSD optical pick up (white wire) and using the wiring instructions provided. He is not running the tach adapter and it was my belief that it may not be required? thanks in advance all! brant |
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| campbellcj |
Jan 21 2010, 01:47 AM
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I can't Re Member Group: Members Posts: 4,631 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California
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I just did this a couple months ago too - I had no tach reading at all without the adapter. Tach is from a 69 or 70E as I recall. With the adapter it reads fine but bounces a lot. I'm going to send it to NH Speedo shortly and get it refaced to a GT/RSR look, and see what they can do about the bouncing.
Let me know if you need a pic or more specifics on the wiring but the above posts pretty well cover it. |
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| underthetire |
Jan 21 2010, 10:07 AM
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
QUOTE(campbellcj @ Jan 20 2010, 11:47 PM)  I just did this a couple months ago too - I had no tach reading at all without the adapter. Tach is from a 69 or 70E as I recall. With the adapter it reads fine but bounces a lot. I'm going to send it to NH Speedo shortly and get it refaced to a GT/RSR look, and see what they can do about the bouncing. Let me know if you need a pic or more specifics on the wiring but the above posts pretty well cover it. The bouncing can be solved by putting a capacitor in the tach. There is a write up on this site somewhere for it. |
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Posts in this topic
brant How to wire the tach on an MSD Jan 20 2010, 09:45 AM
underthetire From what I understand you need it for the VDO tac... Jan 20 2010, 09:48 AM jcd914 When Rob and I put a MSD 6A on his 914/4 we tried ... Jan 20 2010, 10:26 AM Kirmizi Brant, when I hooked up the MSD in mine, I didn... Jan 20 2010, 10:51 AM mightyohm Early tach (silver dot) - Need tach adapter, tach ... Jan 20 2010, 10:56 AM ConeDodger As Jim said, we used the tach output right off the... Jan 20 2010, 10:56 AM rick 918-S I have a custom tach built inside a 914-4 housing ... Jan 20 2010, 11:37 AM naro914 I use an Autometer tach, and it's connected di... Jan 20 2010, 12:21 PM 9146986 If it's a Porsche tach for a six cylinder engi... Jan 20 2010, 12:50 PM
campbellcj
The bouncing can be solved by putting a capacitor... Jan 21 2010, 11:02 AM brant Thanks to all of you!
I'll pass along to ... Jan 21 2010, 10:02 AM watsonrx13 Here's a link to my website showing how I hook... Jan 22 2010, 06:37 PM 9146986 Here's the source!
Just enter the model n... Jan 22 2010, 08:10 PM |
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