7747 spark control questions.

[Walter Sherwin]

I second that motion Bob, especially when using the 90mm "small cap"
external HEI distributors so common in SBC and BBC ECM/PCM applications, and
especially when using the stock cap/rotor setup.  Cross tracking/jumping is
a real issue with these, especially with a better than stock ignition setup
and/or high cylinder loads.

Walt.


>
> Shannen, if you don't mind, I would like to add one more item to consider
> when choosing the base (inital) timing. A v8 distributer is only good for
> about 42 degrees of advance. This is a physical limitation.
>
> By setting more base timing, more total crankshaft timing can be had. This
can
> be good for things like aluminum heads and hi-way spark. You have to
> balance this added inital timing against hot cranking stubbornness.
>
> BobR.
>
>


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