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914World.com _ 914World Garage _ MS-3 and the stock Porsche tach

Posted by: db9146 Jul 31 2017, 06:39 AM

Is anyone using MS-3 and driving the stock tach with it?

Posted by: McMark Jul 31 2017, 11:49 AM

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.

Posted by: 914forme Jul 31 2017, 03:30 PM

You can also have your stock rebuilt with new internals. Or do it yourself, using a donor tach.

http://www.914world.com/bbs2/index.php?showtopic=216719

Posted by: Vacca Rabite Aug 1 2017, 07:39 AM

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

Posted by: PanelBilly Aug 1 2017, 09:15 AM

I have an extra msd tach adapter