David---If the "daily driver" happens to be a hotted up TR6, you can get
some return for this investment. The MSD6-A would be the one for the
six.
Pros: (for the 6-A)
1) Longer point life (like 50,000 miles)
2) Same for spark plugs, including the colder heat ranges.
3) "Multiple Spark" firing thru 20 deg. of crank duration, below 3,000
rpm. (Good for when combustion chamber conditions are less than ideal)
4) Larger gaps can be tolerated at the plug tips, for firing a variety
of air/fuel mixes.
5) Fires the plugs even under high cylinder pressures.
6) Accessories can be fitted, including a manually adjustable,
in-cockpit timer. These are good for a 15 deg. range, should you want to
change the timing for any reason, while you are behind the wheel.
7) Look cool!
Then for the -BoostTimingMaster model:
A) A "chip" can be added to set the rev limit. (Also available in other
MSD models)
B) In-cockpit control for automatic adjustment of spark (retard), when
the box senses boost pressure.
Cons:
1) Costs. Expect to pay from $150. up, depending on accessories.
2) Only good for about 100,000 miles.
However, should one fail, it is easy to return to the stock setup on the
road, as the points are still in service. Wiring can be left in the
engine bay.
3) Installation might be intimidating, but instructions are good.
4) Originality judges?
There's more to all of this. For those who want to wait, they can see
what Roger Williams has to say about this in his newest book.... If it
ever gets to print!
Or visit the Martel Bros. com web site to see their extensive list of
goodies!
Dick Taylor
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