Waste Spark Coils
Bob Wooten
r71chevy at earthlink.net
Fri Feb 23 05:11:03 GMT 2001
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James,
thanks for the input. I think that i am going to stay away from
anything that says "smart". the important thing for me is good power,
reliability cost (in that order). I think that i will hold off of
the expensive trick stuff for now.
BW
----- Original Message -----
From: James
Ballenger
To: diy_efi at diy-efi.org
Sent: 2/22/01 5:42:08 PM
Subject: RE: Waste Spark Coils
$20 buys you a very strong two post waste spark coil (for two
cylinders).
The ignitors I am using now are Smart Bosch units that I have been able
to
source for $35 each so it is $55/2 per cylinder or $27.50 for my
application. You could use cheaper ignitors to reduce the cost,
I use the
smart ones because I rev from 1400 rpm to 14000 rpm. These coils
require
some sort of mount.
The GM coils with ignitors built in are CNP and require 1 per
cylinder.
These are $40 per cylinder and I don't think they are any stronger than
the
waste spark coils. I am also unsure of the ignitor circuit with
regard to
whether or not they are auto-dwell (Smart). I have a GM part #,
but I have
to verify it. These coils can be directly mounted.
James Ballenger
-----Original Message-----
From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org ]On
Behalf Of Jurgen Hartwig
Sent: Thursday, February 22, 2001 10:43 AM
To: diy_efi at diy-efi.org
Subject: Re: Waste Spark Coils
On a similar subject, Jurgen said 2nd gen RX7 but I am not
Mazda
literate so i don't know my first Gen from my fourth
gen. on the
subject
of the RX7 coils, saying that they have that they have the ignitor
in
them, does
that mean that they are fired with a TTL level
input? if so
that would
kill two birds with one stone for me.
Hi, 2nd Gen RX-7s are cars from 86-91. I believe the
earlier
cars used a
distributor and later cars used a different style ignition coil.
Remember, though, the leading coil is the only waste spark
coil. The
trailing coil is a dual post coil, but a trigger wire
alternately triggers
a single post.
Regarding the input, I really am not sure. At the risk
of
sounding really
stupid, what does TTL stand for? I have seen the acronym,
but
never knew
it's meaning.
Is there any way I can test for this?
Regarding the GM coils, I thought $20 bought you the coil, and
you still
had to buy the igniters. If I can get GM coils and
igniter
for less than
$40, then that's a better deal than the RX-7 coils.
Is the GM coil a self-contained unit that can be mounted
easily, or is it
part of a module (i.e. need a mounting bracket)?
Jay
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--- Bob Wooten
--- r71chevy at earthlink.net
--- www.r71camaro.homestead.com
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<DIV>James,</DIV>
<DIV> </DIV>
<DIV>thanks for the input. I think that i am going to stay away from anything that says "smart". the important thing for me is good power, reliability & cost (in that order). I think that i will hold off of the expensive trick stuff for now.</DIV>
<DIV> </DIV>
<DIV>BW</DIV>
<BLOCKQUOTE style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style="FONT: 10pt Arial">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A href="mailto:vtjballeng at yifan.net" title=vtjballeng at yifan.net>James Ballenger</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To: </B><A href="mailto:vtjballeng at yifan.net" title=vtjballeng at yifan.net>diy_efi at diy-efi.org</A></DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> 2/22/01 5:42:08 PM </DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Waste Spark Coils</DIV>
<DIV><BR></DIV><FONT size=2>
<P>
<DIV>$20 buys you a very strong two post waste spark coil (for two cylinders).</DIV>
<DIV>The ignitors I am using now are Smart Bosch units that I have been able to</DIV>
<DIV>source for $35 each so it is $55/2 per cylinder or $27.50 for my</DIV>
<DIV>application. You could use cheaper ignitors to reduce the cost, I use the</DIV>
<DIV>smart ones because I rev from 1400 rpm to 14000 rpm. These coils require</DIV>
<DIV>some sort of mount.</DIV>
<DIV> </DIV>
<DIV>The GM coils with ignitors built in are CNP and require 1 per cylinder.</DIV>
<DIV>These are $40 per cylinder and I don't think they are any stronger than the</DIV>
<DIV>waste spark coils. I am also unsure of the ignitor circuit with regard to</DIV>
<DIV>whether or not they are auto-dwell (Smart). I have a GM part #, but I have</DIV>
<DIV>to verify it. These coils can be directly mounted.</DIV>
<DIV> </DIV>
<DIV>James Ballenger</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>>-----Original Message-----</DIV>
<DIV>>From: <A href="mailto:owner-diy_efi at diy-efi.org">owner-diy_efi at diy-efi.org</A> [<A href="mailto:mailto:owner-diy_efi at diy-efi.org">mailto:owner-diy_efi at diy-efi.org</A>]On</DIV>
<DIV>>Behalf Of Jurgen Hartwig</DIV>
<DIV>>Sent: Thursday, February 22, 2001 10:43 AM</DIV>
<DIV>>To: <A href="mailto:diy_efi at diy-efi.org">diy_efi at diy-efi.org</A></DIV>
<DIV>>Subject: Re: Waste Spark Coils</DIV>
<DIV>></DIV>
<DIV>></DIV>
<DIV>>> On a similar subject, Jurgen said 2nd gen RX7 but I am not Mazda</DIV>
<DIV>>> literate so i don't know my first Gen from my fourth gen. on the</DIV>
<DIV>>subject</DIV>
<DIV>>> of the RX7 coils, saying that they have that they have the ignitor in</DIV>
<DIV>>them, does</DIV>
<DIV>>> that mean that they are fired with a TTL level input? if so</DIV>
<DIV>>that would</DIV>
<DIV>>> kill two birds with one stone for me.</DIV>
<DIV>></DIV>
<DIV>></DIV>
<DIV>>Hi, 2nd Gen RX-7s are cars from 86-91. I believe the earlier</DIV>
<DIV>>cars used a</DIV>
<DIV>>distributor and later cars used a different style ignition coil.</DIV>
<DIV>>Remember, though, the leading coil is the only waste spark coil. The</DIV>
<DIV>>trailing coil is a dual post coil, but a trigger wire</DIV>
<DIV>>alternately triggers</DIV>
<DIV>>a single post.</DIV>
<DIV>></DIV>
<DIV>>Regarding the input, I really am not sure. At the risk of</DIV>
<DIV>>sounding really</DIV>
<DIV>>stupid, what does TTL stand for? I have seen the acronym, but</DIV>
<DIV>>never knew</DIV>
<DIV>>it's meaning.</DIV>
<DIV>></DIV>
<DIV>>Is there any way I can test for this?</DIV>
<DIV>></DIV>
<DIV>>Regarding the GM coils, I thought $20 bought you the coil, and</DIV>
<DIV>>you still</DIV>
<DIV>>had to buy the igniters. If I can get GM coils and igniter</DIV>
<DIV>>for less than</DIV>
<DIV>>$40, then that's a better deal than the RX-7 coils.</DIV>
<DIV>></DIV>
<DIV>>Is the GM coil a self-contained unit that can be mounted</DIV>
<DIV>>easily, or is it</DIV>
<DIV>>part of a module (i.e. need a mounting bracket)?</DIV>
<DIV>></DIV>
<DIV>>Jay</DIV>
<DIV>></DIV>
<DIV>>---------------------------------------------------------------</DIV>
<DIV>>-------------</DIV>
<DIV>>To unsubscribe from diy_efi, send "unsubscribe diy_efi"</DIV>
<DIV>>(without the quotes)</DIV>
<DIV>>in the body of a message (not the subject) to</DIV>
<DIV><A href="mailto:>majordomo at lists.diy-efi.org">>majordomo at lists.diy-efi.org</A></DIV>
<DIV>></DIV>
<DIV>></DIV>
<DIV> </DIV>
<DIV>----------------------------------------------------------------------------</DIV>
<DIV>To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)</DIV>
<DIV>in the body of a message (not the subject) to <A href="mailto:majordomo at lists.diy-efi.org">majordomo at lists.diy-efi.org</A></DIV>
<DIV> </DIV>
<DIV> </DIV>
<P></P></FONT>
<P></P></BLOCKQUOTE>
<DIV> </DIV>
<DIV>--- Bob Wooten</DIV>
<DIV>--- <A href="mailto:r71chevy at earthlink.net">r71chevy at earthlink.net</A></DIV>
<DIV>--- <A href="http://www.r71camaro.homestead.com">www.r71camaro.homestead.com</A></DIV>
<DIV> </DIV>
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