Honda Direct Fire Coils

[Eric Bryant]

> From: James Ballenger [mailto:vtjballeng at yifan.net]
> Subject: RE: Honda Direct Fire Coils
> 
> 
> 	It does seem that Honda is using them in a waste spark 
> setup,but this seems
> odd to me because of the following.  The waste spark coils 
> will charge and
> fire most of the voltage on the side with higher resistance 
> (compression) in
> theory.  Therefore most of the voltage will go to the firing 
> cylinder and
> will be used towards combustion.  If you charge up 2 coils at 
> the same time
> for 2 cylinders, they will both fire fully and will therefore 
> have a full
> spark a few degrees ahead of the intake stroke on the second 
> cylinder.  It
> seems that firing fully on both (CNP) instead of firing 
> partially (waste
> spark) would be an unnecessary draw.  Lemme know if this 
> makes any sense ;-)

Yea, I can understand where you're coming from.  At this point, I think you
would need to question the capacity of the bike's charging system - can the
bike supply sufficient current to fully-charge both coils?  Seeing as how
most bikes have pathetic charging systems (especially the permament-magnet
types at low revs), I think it's a fair question on your behalf.  Thanks for
explaining your point.

Eric Bryant
mailto:bryante at ghsp.com
http://www.novagate.com/~bryante 
----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org