Msd 6al factory tach hookup

[Ogeluv]

Just put in an msd 6al2 box coil and pro billet distributor in my 66. Where does the tach wire go for the factoty tach? Do I hook it up to the sending unit? directly to the tach? Do I need the tach adapter and if so where does that tie in? I called msds tech line but all the guy could tell me was to hook it to the wire that came from the coil negative.

 

[HT413]

He's correct. There is a green wire (i beleive its green) from coil (-) to tach. The 6AL has a tach output wire that must connect to your tach wire. I'm not sure off hand the color of the wire coning off the MSD. Im not running a factory tach, but am running an el-cheapo Sun tach and it needed no tach adaptor, so perhaps the tech is right.

 

[69Bee]

If I remember correctly, you can only use the tach terminal on the MSD box. The signal at the coil is misleading to the tach, and wil not read correctly.

 

[bigmanjbmopar]

Not sure if this will work for you or not but check it out. I highlighted a FSM page into a pdf

https://app.box.com/s/5otfc3xq81pswtwx2lsn

- - - Updated - - -

Here is the full book

https://app.box.com/s/faqnqu52iy76f61reb73

 

[Gpuller]

I'm pretty sure your gonna need the MSD tach adapter to make your factory tach work.

 

[69Bee]

Here are the instructions from the MSD website:

Go here and download the instruction sheet for the 9810 tach adapter. http://www.msdignition.com/instructiondownload.aspx