Mtgrizzlymn
Sr. Member
- Joined
- Apr 17, 2013
- Messages
- 668
It was on my bronco when I bought it, I really have no idea what it does. Is it more reliable to just get rid of it? Plus my tach don't work with it lol
It truly has its place but is best suited to a truly high performance engine with higher than typical compression. I ran one for nearly 30 years. Not running one now but I have a Pertronix distributor that does a little of what the MSD 6A does on its own.
MSD was originally developed to fire lean mixtures from the emission era it just works out that it helps fire any mixture. It is not a race part it just has a lot of racing marketing. If it is not giving you any problems it never will. Unless you jump start your truck wrong or you submerge it.
I have found Pertronix to be flaky and refuse to use them. I have used MSD reliably for 30 years. But they did have some cheap off shore copies that sucked.
My tach will work on highway but when I stop it stays at 2000 or so then will start again when I' got the revs up!
MSD has a tach adapter you can get. It will give your tach a signal it likes.
The MSD (multiple spark discharge) 6A box provides multiple sparks per combustion event below 3000 rpm and a long duration single spark above 3000 rpm.
Translation, more complete combustion and theortically smoother idle.
It truly has its place but is best suited to a truly high performance engine with higher than typical compression. I ran one for nearly 30 years. Not running one now but I have a Pertronix distributor that does a little of what the MSD 6A does on its own.