MSD 6AL and old tachometers

[Olaf/DFL]

Hi there,

I just installed an MSD 6AL Box with a Mallory distributor in my car last week. It all works very well. The only problem I have is to get my old Smiths tach working... The tach output of the MSD-box is a digital one. So I can´t use it. How did you fix it?

Cheers,
Olaf

[Rune]

Hey Olaf, are you sure you can't use the tach output?
I have a MSD 6AL, 010 distributor and a 30 year old sideswept autometer tach. It works on the tach output...

[Olaf/DFL]

Hi Rune,

hmm, I read somewhere that the tach output of the MSD-box is a digital signal. So I thought that it won´t work with my old tach... I have also heard of similar problems from other peoples some time ago. But maybe I have to check it out first when I get my tach back...

Cheers,
Olaf

[Rune]

Try it, it should work

[Tobi/DFL]

Hi Olaf, I had the same difficulties with my VDO Porsche 914 tach and Mallory HyFire 6 box. The tach output didn´t work so I had to install a tach adaptor...