[Gmecm] TBI Swap - Iron Duke Tech IV

[bcroe at juno.com]

Gary, 

It sounds like we agree.  Havng those holes in a test 
cap others described, or a transparent cap (I think 
the same one could serve both V8 and 4) allows 
properly checking the adjustment.  The spark must 
always occur where part of the post and rotor are 
adjacent; having the rotor opening up the gap as 
it leaves isn't acceptable.  Bruce Roe

20 Feb 2006  "Gary" <gas- at charter.net> writes:
> Bruce, if I understand you correctly, I agree, as this would be 
> similar to what was done to distributors prior to any form of 
> electronic ignition.  IOW, to get proper rotor phasing with just
> mechanical advance, it was necessary to lock the breaker plate
> in a full vacuum advance position after rendering the vacuum
> advance inoperative, then reset the timing.  Most did not do
> this procedure when operating with just the mechanical advance
> and didn't realize the gap the voltage needed to bridge to reach
> terminal in the cap.  Did I understand you correctly?
> 
> Gary
> 
> ----- Original Message ----- 
> From: <bcroe at juno.com>
> To: <gmecm at diy-efi.org>
> Sent: Feb 20, 2006 

> > Just to see what's possible, I did some measurements 
> > on a V8 HEI, mechanical advance.