Dwell and HEI's

[rbraun at mail.enter.net]

AFAIK, dwell will be about 6 at idle and goto about 30 by 2500 rpm.  
You must have at least a 10 gauge wire to the coil, I also ran a 10 
gauge wire to the dist. to ground it.

On my '82 Bird with the Accel/DFI I fried 4 modules over two years. 
Could never find a reason why. Two were Accel units, Melted the 
sticker right off the top.  Accel replaced my ECM as a guess and I 
added a heat sink to the bottom of the dist. under the module. BTW 
this is a small diameter HEI.

BTW2, I think some of you on this list may be interested in books 
from Mascotech, they print all the GM training manuals, I have the 
Fuel injection book, (has basic description of each ECM I/O, plus ECM 
pinouts) also states the dist. pickup coil out goes from 500 mv at 
idle to over 100 volts at high speed.  Unfortunately no juicy info on 
the PROMS or other programming info.
 Mascotech 1-800-393-4831
catalogs are free  (ask for GM training materials catalog)
FI book was $20.00 about two years ago.

> << 
>  	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.
>   >>
Randy Braun     rbraun at enter.net
91  GTA
82 Firebird