Honda Direct Fire Coils

James Ballenger vtjballeng at yifan.net
Thu Feb 22 06:31:13 GMT 2001


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    Honda did something similar on some new bike engines and these rev to
14,100 rpm.  The problem I ran into with my Haltech E6S is that I only had
two outputs to control ignition which would be very inefficient with these
coils because two would fully fire at each tdc and could cause problems.  If
you have 4 dedicated outputs and have a cam sensor you can run them but they
are expensive and by design less powerful than the large coils of units
outside the head.  The cool factor is extremely high though ;-)  I just
realized though that the 99' F4 runs coil per plug and they have no cam
sensor... hmmm.

http://planeta.clix.pt/cbr600f4/pics/600f4-12.jpg
http://planeta.clix.pt/cbr600f4/pics/600f4-25.jpg

James Ballenger
  -----Original Message-----
  From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
Behalf Of Chris Capowski
  Sent: Wednesday, February 21, 2001 10:14 PM
  To: DIY_EFI
  Subject: Honda Direct Fire Coils


  All this talk of wasted spark coil packs got me thinking.  I am thinking
of trying to use Honda direct fire coils from an S2000 on my race car (Honda
4 cyl, 10,000 RPM)  They look like a long (6") spark plug boot (if anyone
hasn't seen them) and sit directly on the spark plug.  They also have a
built in ignitor.  The only terminals they have is +,-, trigger and of
course the connection to the plug.  No idea what kind of trigger input it is
looking for, the service manual has absolutely nothing.  I need to figure
out if I can fire this with a Haltech IG6.

  Anybody have any info on these types of coils?  I would really like to be
able to use them as having no plug wires means there is four less cheap
parts that can break and end a race (same reason why you wont find a single
fuse in the car, and before someone asks, yes, that includes any computer
fuses)

  Chris "Mighty Mouse" Capowski

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<BODY bgColor=3D#ffffff>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D495431006-22022001>&nbsp;&nbsp;&nbsp; Honda did something =
similar on some=20
new bike engines and these rev to 14,100 rpm.&nbsp; The problem I ran =
into with=20
my Haltech E6S is that I only had two outputs to control ignition which =
would be=20
very inefficient with these coils because two would fully fire at each =
tdc and=20
could cause problems.&nbsp; If you have 4 dedicated outputs and have a =
cam=20
sensor you can run them but they are expensive and by design less =
powerful than=20
the large coils of units outside the head.&nbsp; The cool factor is =
extremely=20
high though ;-)&nbsp; I just realized though that the 99' F4 runs coil =
per plug=20
and they have no cam sensor... hmmm.</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D495431006-22022001></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D495431006-22022001><A=20
href=3D"http://planeta.clix.pt/cbr600f4/pics/600f4-12.jpg">http://planeta=
.clix.pt/cbr600f4/pics/600f4-12.jpg</A></SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D495431006-22022001><A=20
href=3D"http://planeta.clix.pt/cbr600f4/pics/600f4-25.jpg">http://planeta=
.clix.pt/cbr600f4/pics/600f4-25.jpg</A></SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D495431006-22022001></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D495431006-22022001>James=20
Ballenger</SPAN></FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px">
  <DIV align=3Dleft class=3DOutlookMessageHeader dir=3Dltr><FONT =
face=3DTahoma=20
  size=3D2>-----Original Message-----<BR><B>From:</B> =
owner-diy_efi at diy-efi.org=20
  [mailto:owner-diy_efi at diy-efi.org]<B>On Behalf Of </B>Chris=20
  Capowski<BR><B>Sent:</B> Wednesday, February 21, 2001 10:14 =
PM<BR><B>To:</B>=20
  DIY_EFI<BR><B>Subject:</B> Honda Direct Fire =
Coils<BR><BR></DIV></FONT>
  <DIV><FONT face=3DArial size=3D2>All this talk of wasted spark coil =
packs got me=20
  thinking.&nbsp; I am thinking of trying to use Honda direct fire coils =
from an=20
  S2000&nbsp;on my race car (Honda 4 cyl, 10,000 RPM)&nbsp; They look =
like a=20
  long (6") spark plug boot (if anyone hasn't seen them) and sit =
directly on the=20
  spark plug.&nbsp; They also have a built in ignitor.&nbsp; The only =
terminals=20
  they have is +,-, trigger and of course the connection to the =
plug.&nbsp; No=20
  idea what kind of trigger input it is looking for, the service manual =
has=20
  absolutely nothing.&nbsp; I need to figure out if I can fire this with =
a=20
  Haltech IG6.&nbsp; </FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2>Anybody have any info on these types =
of=20
  coils?&nbsp; I would really like to be able to use them as&nbsp;having =
no plug=20
  wires means there is four less cheap parts that can break and end a=20
  race&nbsp;(same reason why you wont find a single fuse in the car, and =
before=20
  someone asks, yes, that includes any computer fuses)</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2>Chris "Mighty Mouse"=20
Capowski</FONT></DIV></BLOCKQUOTE></BODY></HTML>

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