J-bodies and DIS

[ABTSZ]

In a message dated 98-04-16 15:01:01 EDT, you write:

<< Not sure why the DIS cal won't work directly.
 we tried but??? wouldn't run right.
 
 I don't think it was a spark ref angle problem. More like
 the signal was inverted..
  >>

According to the chilton manuals, The crank sensor sends twice as many pulses
to the DIS as would a HEI to the ECM.
  The Chilton then implies that the DIS cuts the number of impulses in half
and then sends them to the ECM.  This would be the same number of impulse
going to the ECM as in an HEI system.
  BUT they aren't actually "pulses".  I'm not sure how to describe it, but
I'll try to "draw" it:
HEI system:
_____[]_____[]_____[]_____[]  etc.

DIS:
         ______           ______
_____[          ]_____[          ]______ etc.

At least that's the impression I got.

SO if I convert a J-body system to HEI, I will need a F-body prom with VATS
disabled.

Thanks for the info,
Adam