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Title: installation help needed for a 8920 tach adaptor (MSD) Post by: wolfswest on June 11, 2010, 21:03:52 pm Hi guys,
recently I bought myself a msd setup but my old school vdo tacho wouldn't work with. Did some reading and I found out a 8920 tacho adaptor would do the trick. Now, I have a very old model I can use from somebody but this version has an extra wire. The latest 8920 box doesn't have the orange wire anymore and I can't find a wiring diagram for the older models... >:( please help!! If someone have the same setup or know something about this old stuff, any help is appreciated! I wired it like this: black: ground red: + from iginition switch white: on the tach output on the 6al box violet: to the vdo tacho orange: don't have a clue, and like this, it doesn't work... thx, Dem Title: Re: installation help needed for a 8920 tach adaptor (MSD) Post by: wolfswest on June 13, 2010, 08:27:49 am nobody? :-[
Title: Re: installation help needed for a 8920 tach adaptor (MSD) Post by: Peter on June 13, 2010, 10:59:36 am I wish I could help you,
but i dont know shit about MSD :( maybe Jelle knows? Title: Re: installation help needed for a 8920 tach adaptor (MSD) Post by: TexasTom on June 13, 2010, 15:03:43 pm Have you tried: orange to coil neg. (-)?
Title: Re: installation help needed for a 8920 tach adaptor (MSD) Post by: wolfswest on June 13, 2010, 15:56:21 pm Have you tried: orange to coil neg. (-)? nope, I have not tried that combo... because msd writes down in their manual to avoid the coil for any output... ::) Title: Re: installation help needed for a 8920 tach adaptor (MSD) Post by: TexasTom on June 13, 2010, 16:34:24 pm Check this link ... this guy may have been dealing with your same problem(s) ...
http://forums.pelicanparts.com/porsche-911-technical-forum/206704-msd-tach-adapter-not-helping-2.html Title: Re: installation help needed for a 8920 tach adaptor (MSD) Post by: Eric Ellis (57HotrodVW) on June 13, 2010, 16:38:24 pm Have you seen the following PDF file? It's related to wiring an MSD 6 box/8920 tach adapter, and includes a reference to an orange wire from the the ignition box:
http://www.msdpowersports.com/pdf/frm22049_pn8920.pdf You may also find the troubleshooting tips in the thread at http://www.msdignition.com/forum/showthread.php?t=3348 helpful. Title: Re: installation help needed for a 8920 tach adaptor (MSD) Post by: wolfswest on June 13, 2010, 18:49:20 pm Eric, Tom,
thx for the input guys. I've read the posted links but they are all for the newer 8920 box... I've logged in to the msd forum and I started a new topic. I'll hope there is an old school msd dude out there to help me out. :) Dem |