Honda Direct Fire Coils

[James Ballenger]

>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.

	Yes, this is a serious problem we have run into. Our electrical demand on
our car is far higher than that of the stock bike.  We think Honda's
alternator, permanent magnet type at other end of crank, is putting out
plenty of power, but we end up frying voltage regulators consistently.  We
have two possible solutions, make a MUCH larger finned heatsink that will
see airflow or go with a larger bikes regulator, like a goldwing or
something.  Most teams claim the heatsink approach works so we will try this
first.

James Ballenger

>-----Original Message-----
>From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
>Behalf Of Eric Bryant
>Sent: Friday, February 23, 2001 8:23 AM
>To: 'diy_efi at diy-efi.org'
>Subject: RE: Honda Direct Fire Coils
>
>
>> 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
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