 Later 911 2.7 tacho,, wiring info anyone,please |
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| porschetub |
 Oct 16 2016, 01:55 PM
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#1
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Advanced Member  Group: Members Posts: 4,706 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None  |
My current tach is from memory a 72 911 one,looks nice but that's about it,the needle is unstable as rpm changes and not reading right.
I have a later tach which is from a 76 and has 8 pins on the back (only 3 used) can anyone tell me what pins 2,5 and 6 are for ?. 1 x purple black to engine loom, 1 x brown earth, 1 x red/black switched power. I need to know which wire to which pin,thanks in advance |
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| Catorse |
Oct 16 2016, 10:10 PM
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#2
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Member Group: Members Posts: 194 Joined: 27-August 15 From: Los Angeles Member No.: 19,106 Region Association: Southwest Region |
All it needs are those three connections - 12v switched, ground, and tach signal. Your problem is that it doesn't have an adapter for an early car.
Try looking for a "tach adapt" which converts the tach signal to something your tach can understand. |
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| porschetub |
Oct 17 2016, 02:14 AM
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#3
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Advanced Member Group: Members Posts: 4,706 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(Catorse @ Oct 17 2016, 05:10 PM)  All it needs are those three connections - 12v switched, ground, and tach signal. Your problem is that it doesn't have an adapter for an early car. Try looking for a "tach adapt" which converts the tach signal to something your tach can understand. But which pins do I connect to? otherwise your answer is well ....useless sorry ,already have tachadaptor in there and know I have to change the jumper connection for the early to late input rate. |
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| Catorse |
Oct 17 2016, 08:18 AM
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#4
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Member Group: Members Posts: 194 Joined: 27-August 15 From: Los Angeles Member No.: 19,106 Region Association: Southwest Region |
QUOTE(porschetub @ Oct 17 2016, 01:14 AM) QUOTE(Catorse @ Oct 17 2016, 05:10 PM) All it needs are those three connections - 12v switched, ground, and tach signal. Your problem is that it doesn't have an adapter for an early car. Try looking for a "tach adapt" which converts the tach signal to something your tach can understand. But which pins do I connect to? otherwise your answer is well ....useless sorry ,already have tachadaptor in there and know I have to change the jumper connection for the early to late input rate. I just did this on my car; I have a 2.7 with a 911 2.7 tach and electromotive ignition. I don't recall the exact pin out, but they were clearly marked on the back of the tach (engraved). I did not need to use all the pins, just like you. My tach works just fine, but having said that I had it rebuilt at No Ho speedo, and they asked me what kind of ignition I was using. You can figure out ground and +12 volts. My question to you is where your tach signal is coming from? And, have you ruled out the tach itself as being free of problems? Lastly, go find a 2.7 wiring diagram. It will tell you what each pin means. |
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Posts in this topic
porschetub Later 911 2.7 tacho, Oct 16 2016, 01:55 PM
Catorse Check this out, it's on pelican - GOOGLE IT.
... Oct 17 2016, 08:24 AM ClayPerrine The factory 911/914-6 ignition circuit is a capaci... Oct 17 2016, 11:27 AM porschetub Thank you gentleman for your replys.
I did search ... Oct 17 2016, 12:34 PM Catorse That doesn't look like the tach I have (74-77)... Oct 17 2016, 02:35 PM
porschetub
That doesn't look like the tach I have (74-77... Oct 17 2016, 07:06 PM Steve It's not rocket science. There is a part numb... Oct 17 2016, 02:44 PM mepstein I might have a tach for a 2.7 that I can trade you... Oct 17 2016, 07:22 PM porschetub Thanks a lot Steve that's what I needed,I will... Oct 18 2016, 12:08 PM porschetub Have been in contact with Bob @ tachadapt and he h... Oct 20 2016, 05:08 PM |
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