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dino 246 ignition upgrade and tacho compatibility?
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Posts: 8From: BerlinRegistered: Mar 2008
alh
Junior Member


Monday, March 03, 2008 6:42 AM

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I'm in the process of exchanging the original Marelli points/Dinoplex ignition of an european E series Dino
against an Pertronix Ignitor/Hyfire 6AL/Promaster E coil setup.

I wonder if this setup requires an tacho adapter as the standard Veglia tacho apparently seems to require an initial spike to work, but such a requirement was not mentioned in the forums postings yet.

If you have exchanged your Dinoplex for an MSD or Mallory 6A box, did your tacho work without modification?




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Posts: 1202Registered: Dec 2001
BillBadurski
FCA Technical Chairman


Sunday, March 09, 2008 1:03 PM

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The MSD box's tach connector works on the Boxer, so I'd presume it works with the Dino just as well.

-------------------------
William V. Badurski
FCA Technical Chairman


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Posts: 8From: BerlinRegistered: Mar 2008
alh
Junior Member


Sunday, May 04, 2008 9:12 AM

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Have finished the installation and can report that the combination Pertronix MR-161, Mallory Hyfire 6AL and E-Coil 30440 runs nicely! No problems driving the tacho directly from the Hyfire tach signal.




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Posts: 16Registered: Oct 2002
shross
Junior Member


Sunday, June 22, 2008 10:44 PM

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Ever since I put an MSD into my '74 Dino, a strange thing occurs. The tach works fine until I get to 5000 RPM. Then, at that level, the tach starts dancing between 2000-5000 RPM with no loss or disruption of power. Anything under 5000 (in any gear) is fine.

Also, I note that the tach does not register idle speeds and only kicks in above 1500 RPM.

Any ideas, anybody?




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Posts: 8From: BerlinRegistered: Mar 2008
alh
Junior Member


Monday, June 23, 2008 4:21 PM

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I would assume that the Tach in a '74 Dino is the same type as the one in my '72. If so it sounds like as if the signal from the MSD tach output is to weak below 1500 and above 5000 to drive the tach.

As a quick test, measure the resistance of the brown cable between the tach input and the MSDs output (disconnect the tach and MSD first). Resistance should be way below one ohm. Another quick test, use a loose new cable to connect the MSDs tach output to the tach and do a stationary test with idle and above 5000 rpm. Also check the ground connection to your tach to make sure there is no faulty ground connection inducing problems.




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