Dwell and HEI's

[HeinGer at aol.com]

In a message dated 98-02-20 23:25:21 EST, you write:

<< 
 	My reason for asking this is due to the limited RPM I have read about the GM
HEI. My V-8 Datsun Z seems to run out of ign. at about 5500 RPM but my engine
will run to 6500+ RPM. I have read the Jacobs guide to optimizing your ign.
and I am going to buy the GM performance coil Jacobs recommends for the HEI
but it did not mention anything about improving the coil saturation time. I am
not really sure if this is really a issue but I have also read that the HEI
falls off at higher RPM's due mainly to the module not being able to keep up.
  >>


My 66 GTO gets shifted regularly at 6500 rpm, runs 115 mph in the quarter
(4100 lbs with me in it), and relies on a completely stock HEI.  How bad can
it be at high rpm?  I've heard that the good modules (pre computer-controlled)
have a "990" stamped on them. Also, it's critical that you put heat sink paste
on the back of the module. 
Heinrich Gerhardt