Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

> Coil Querie
kenshapiro2002
post Aug 17 2009, 01:03 PM
Post #1


Senior Member
***

Group: Members
Posts: 1,441
Joined: 23-July 09
From: Bawlmer, MD
Member No.: 10,598
Region Association: MidAtlantic Region
In my ongoing quest to "fix"everything possible before I start rebuilding my webers, I figured I'd check out my coil today. I read an online article that said it's better checked out of the car, than in, and gave instructions that have me needing the resistance specs (which Haynes doesn't list).

Then, I started wondering why there was a spare (used) coil in the trunk. The Bosch coil currently in the car has two numbers on it. They are:

0 221 102 076
0 222 905 115

The spare coil lying in the trunk is:

0 221 119 009

Any insight here is appreciated as always...don't know what I'd do without y'all!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
 Reply to this topicStart new topic
Replies(1 - 9)
SLITS
post Aug 17 2009, 02:14 PM
Post #2


"This Utah shit is HARSH!"
**********

Group: Benefactors
Posts: 13,602
Joined: 22-February 04
From: SoCal Mountains ...
Member No.: 1,696
Region Association: None
0 221 102 076 = VW 022 905 115 B ... All 914 models

0 221 119 009 = Porsche 928 602 501 00 / VW 059 905 105 B, fits BPM Oceanic, Vulcano 450 / 375, V12/570, V 12/620 S

0 22 905 115 doesn't come up in Bosch ESI .. no information
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Cap'n Krusty
post Aug 17 2009, 02:37 PM
Post #3


Cap'n Krusty
**********

Group: Members
Posts: 10,794
Joined: 24-June 04
From: Santa Maria, CA
Member No.: 2,246
Region Association: Central California
If it fits a 928, don't use it. It's made for Bosch electronic ignition, not points or aftermarket point replacement. The Cap'n
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
kenshapiro2002
post Aug 17 2009, 03:33 PM
Post #4


Senior Member
***

Group: Members
Posts: 1,441
Joined: 23-July 09
From: Bawlmer, MD
Member No.: 10,598
Region Association: MidAtlantic Region
Thanks.

QUOTE(SLITS @ Aug 17 2009, 04:14 PM) *

0 221 102 076 = VW 022 905 115 B ... All 914 models

0 221 119 009 = Porsche 928 602 501 00 / VW 059 905 105 B, fits BPM Oceanic, Vulcano 450 / 375, V12/570, V 12/620 S

0 22 905 115 doesn't come up in Bosch ESI .. no information
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
kenshapiro2002
post Aug 17 2009, 03:35 PM
Post #5


Senior Member
***

Group: Members
Posts: 1,441
Joined: 23-July 09
From: Bawlmer, MD
Member No.: 10,598
Region Association: MidAtlantic Region
Thanks. Any idea where to find resistance specs on the stock coil?


QUOTE(Cap'n Krusty @ Aug 17 2009, 04:37 PM) *

If it fits a 928, don't use it. It's made for Bosch electronic ignition, not points or aftermarket point replacement. The Cap'n
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
neil30076
post Aug 17 2009, 04:29 PM
Post #6


Recovering dismantler!
**

Group: Members
Posts: 397
Joined: 12-September 06
From: San Diego ( RB) CA
Member No.: 6,826
Region Association: Southwest Region
QUOTE(kenshapiro2002 @ Aug 17 2009, 02:35 PM) *

Thanks. Any idea where to find resistance specs on the stock coil?


QUOTE(Cap'n Krusty @ Aug 17 2009, 04:37 PM) *

If it fits a 928, don't use it. It's made for Bosch electronic ignition, not points or aftermarket point replacement. The Cap'n



Between 1 and 15 - 3.4ohm
between 1 or 15 and center 6.8kohm,
hence 2000 : 1 ratio, 12v in, 24,000 volts out -
and stay away from the 928 coil - that puts out around 50k - at least in my 928!!!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
kenshapiro2002
post Aug 17 2009, 04:38 PM
Post #7


Senior Member
***

Group: Members
Posts: 1,441
Joined: 23-July 09
From: Bawlmer, MD
Member No.: 10,598
Region Association: MidAtlantic Region
Are you saying 3.4 ohm for the primary coil (between the two male posts), and 6.8k ohm for the secondary coil (between the center and the male plug)?


QUOTE(neil30076 @ Aug 17 2009, 06:29 PM) *

QUOTE(kenshapiro2002 @ Aug 17 2009, 02:35 PM) *

Thanks. Any idea where to find resistance specs on the stock coil?


QUOTE(Cap'n Krusty @ Aug 17 2009, 04:37 PM) *

If it fits a 928, don't use it. It's made for Bosch electronic ignition, not points or aftermarket point replacement. The Cap'n



Between 1 and 15 - 3.4ohm
between 1 or 15 and center 6.8kohm,
hence 2000 : 1 ratio, 12v in, 24,000 volts out -
and stay away from the 928 coil - that puts out around 50k - at least in my 928!!!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
neil30076
post Aug 17 2009, 04:46 PM
Post #8


Recovering dismantler!
**

Group: Members
Posts: 397
Joined: 12-September 06
From: San Diego ( RB) CA
Member No.: 6,826
Region Association: Southwest Region
QUOTE(kenshapiro2002 @ Aug 17 2009, 03:38 PM) *

Are you saying 3.4 ohm for the primary coil (between the two male posts), and 6.8k ohm for the secondary coil (between the center and the male plug)?


exactly -

Between 1 and 15 ( male posts) - 3.4ohm
between either post and center 6.8kohm,
hence 2000 : 1 ratio, 12v in, 24,000 volts out -
and stay away from the 928 coil - that puts out around 50k - at least in my 928!!!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
kenshapiro2002
post Aug 17 2009, 04:50 PM
Post #9


Senior Member
***

Group: Members
Posts: 1,441
Joined: 23-July 09
From: Bawlmer, MD
Member No.: 10,598
Region Association: MidAtlantic Region
Thanks...much clearer. The article talks about the coil needing to be within the specifed range. How "off" do you think either of those specs can and the coil still be acceptable?



QUOTE(neil30076 @ Aug 17 2009, 06:46 PM) *

QUOTE(kenshapiro2002 @ Aug 17 2009, 03:38 PM) *

Are you saying 3.4 ohm for the primary coil (between the two male posts), and 6.8k ohm for the secondary coil (between the center and the male plug)?


exactly -

Between 1 and 15 ( male posts) - 3.4ohm
between either post and center 6.8kohm,
hence 2000 : 1 ratio, 12v in, 24,000 volts out -
and stay away from the 928 coil - that puts out around 50k - at least in my 928!!!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
neil30076
post Aug 17 2009, 05:10 PM
Post #10


Recovering dismantler!
**

Group: Members
Posts: 397
Joined: 12-September 06
From: San Diego ( RB) CA
Member No.: 6,826
Region Association: Southwest Region
QUOTE(kenshapiro2002 @ Aug 17 2009, 03:50 PM) *

Thanks...much clearer. The article talks about the coil needing to be within the specifed range. How "off" do you think either of those specs can and the coil still be acceptable?


I would say 3 min- 4 max ohms on the low side, read with a decent digital meter, and the high should be enough to get over 24k volts. I do not think you have a coil problem, but i have been wrong before!
A coil failure problem is more likely to be a dead short ( low side due to shorted points frying the coil) or open circuit than a change in base resistance. The output side cannot generate any voltage unless the points are opening and closing, if they stay closed the coil overheats and fails. If you have a short on the high voltage side it can fail, but less likely.
Have you done the water spray test on the plug leads to see if they are breaking down - sometimes called the firefly test?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Switch to: Standard · Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 10th June 2024 - 06:57 AM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...