 MS-3 and the stock Porsche tach |
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| db9146 |
 Jul 31 2017, 06:39 AM
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#1
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Senior Member  Group: Members Posts: 953 Joined: 21-December 04 From: Atlanta, GA Member No.: 3,315 Region Association: None 
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Is anyone using MS-3 and driving the stock tach with it?
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Replies(1 - 4)
| McMark |
Jul 31 2017, 11:49 AM
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#2
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
A lot of the aftermarket tach output is a lower voltage signal. Our early stock tach uses a 12v signal. You can use pretty much any 'Tach Adapter' such as the one from MSD. This takes the low voltage signal and steps it up to 12v. You can also use a late tach, which seems to work out of the box, but you lose the 'silver dot' if that's how your gauges look.
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| 914forme |
Jul 31 2017, 03:30 PM
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#3
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Times a wastin', get wrenchin'! Group: Members Posts: 3,896 Joined: 24-July 04 From: Dayton, Ohio Member No.: 2,388 Region Association: None
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You can also have your stock rebuilt with new internals. Or do it yourself, using a donor tach.
As seen here |
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| VaccaRabite |
Aug 1 2017, 07:39 AM
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#4
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En Garde! Group: Admin Posts: 13,456 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
What Mark said.
My MS will drive the stock tach just fine on my car, but my car has a 75 build date. No changes are needed if you have a later tach. Zach |
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| PanelBilly |
Aug 1 2017, 09:15 AM
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#5
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914 Guru Group: Members Posts: 5,811 Joined: 23-July 06 From: Kent, Wa Member No.: 6,488 Region Association: Pacific Northwest
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I have an extra msd tach adapter
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