Re: Timing an MSD on a Scat Engine

Hey-A Eric,

 I run an all MSD ignition setup in my 65' Drag bug, Just time it to the
specs of the engine. Personally, I'd time it in the range of 7 to 14 Degrees
before TDC. There are many variances in these engines and you haven't
mentioned if you have stock 1.1:1 ratio rocker arms or something faster? All
of these things will change the engine's idle rpm timing sweet spot. You
have to time it while the engine's running of course (I don't believe in
static timing anything unless you absolutely must!).
DON'T TIME IT BY EAR!!!!! The MSD Ignition module fires multiple sparks (6)
below 3500 RPM and you can move the distributor somewhere in the range of 60
degrees advanced & not hear it like you can in a non CDI set-up. Believe me
as I did this when I first installed mine & didn't know it until I strobed
it.
 If you have either a Degree pulley or, a Dial back timing light, Make sure
that the MSD ignition is also providing enough total advance. It should be
between 30 and 36 degrees. If it isn't, Change the stop bushing to the one
that will get you the closest.
 It took me a little bit of time of test & tuning & trips down the track to
dial in mine perfectly but it's worth the effort.
Then only thing I dislike about The MSD distributor & 6-A(AL) boxes is that
you will need to monitor your high tension wires (Plug wires) for burning as
the increased power likes to disintegrate these wires in as little as a
month of street use!!!! This is common with MSD ignitions as I heard this
from many street users of their products. As soon as it starts missfiring,
Look at your wires.
Other than that, I haven't had a problem in the 4 years that I have had
them.
Cheers,
Dave.