7747 spark control questions.

[Bruce Plecan]

Are you saying you've had more cross tracking problems with the small caps?.
My experience has been the opposite..
I've also, never had a small cap rotor burn thru and dozens of the large
ones have done that.
Bruce




----- Original Message -----
From: "Walter Sherwin" <wsherwin at home.com>
To: <gmecm at diy-efi.org>
Sent: Wednesday, October 18, 2000 9:19 PM
Subject: Re: 7747 spark control questions.


> 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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