coil alternatives
03-21-2012, 09:36 AM
#16
Rennlist Member
Join Date: Jun 2010
Location: Detroit (Rock City); 1990 C4
Posts: 1,710
Likes: 0
Received 4 Likes
on
4 Posts
When replacing an ignition coil, use a replacement coil which has the overall
electrical characteristics as the original one, i.e. primary resistance, primary inductance, and turns ratio. A number of commonly available coils with their characteristics are presented here under 'Typical Ignition Coil Values'; Diagnostic
electrical characteristics as the original one, i.e. primary resistance, primary inductance, and turns ratio. A number of commonly available coils with their characteristics are presented here under 'Typical Ignition Coil Values'; Diagnostic
Loren, thanks for the input but.... where is "here" in this context?
TIA!
03-21-2012, 09:40 AM
#17
Rennlist Member
Join Date: Jun 2010
Location: Detroit (Rock City); 1990 C4
Posts: 1,710
Likes: 0
Received 4 Likes
on
4 Posts
Nevermind, "Here" is HERE.
From Loren's page:
"Typical Ignition Coil Values
Bosch TCI (black/silver) - R(primary) = .70 ohms, R(secondary) = 6200 ohms, N = 90, L(primary) = 3.6 mH, L(secondary) = 30 H, ~ 60 mjoules @ 6K RPM - 6 cylinders TCI
Bosch Blue Coil - R(primary) = 3.5 ohms, R(secondary) = 8800 ohms, N = 65, L(primary) = 12 mH, L(secondary) = 50 H, ~ 30 mjoules @ 6K RPM - 6 cylinders TCI
Bosch CDI (small black) - R(primary) = .30 ohms, R(secondary) = 700 ohms, N = 78, L(primary) = .20 mH, L(secondary) = 1.2 H
Bosch CDI (small silver) - R(primary) = .70 ohms, R(secondary) = 720 ohms, N = 63, L(primary) = .40 mH, L(secondary) = 1.6 H
MSD Blaster (8222) - R(primary) = 1.1 ohms, R(secondary) = 4700 ohms, N = 95, L(primary) = 4.2 mH, L(secondary) = 38 H
Perma-Tune - R(primary) = .90 ohms, R(secondary) = 10000 ohms, N = 125, L(primary) = 4.7 mH, L(secondary) = 74 H"
Any idea what the specs on the 993 coils are?
From Loren's page:
"Typical Ignition Coil Values
Bosch TCI (black/silver) - R(primary) = .70 ohms, R(secondary) = 6200 ohms, N = 90, L(primary) = 3.6 mH, L(secondary) = 30 H, ~ 60 mjoules @ 6K RPM - 6 cylinders TCI
Bosch Blue Coil - R(primary) = 3.5 ohms, R(secondary) = 8800 ohms, N = 65, L(primary) = 12 mH, L(secondary) = 50 H, ~ 30 mjoules @ 6K RPM - 6 cylinders TCI
Bosch CDI (small black) - R(primary) = .30 ohms, R(secondary) = 700 ohms, N = 78, L(primary) = .20 mH, L(secondary) = 1.2 H
Bosch CDI (small silver) - R(primary) = .70 ohms, R(secondary) = 720 ohms, N = 63, L(primary) = .40 mH, L(secondary) = 1.6 H
MSD Blaster (8222) - R(primary) = 1.1 ohms, R(secondary) = 4700 ohms, N = 95, L(primary) = 4.2 mH, L(secondary) = 38 H
Perma-Tune - R(primary) = .90 ohms, R(secondary) = 10000 ohms, N = 125, L(primary) = 4.7 mH, L(secondary) = 74 H"
Any idea what the specs on the 993 coils are?
03-22-2012, 10:51 AM
#20
Pro
Join Date: Nov 2010
Location: Omaha, NE
Posts: 652
Likes: 0
Received 0 Likes
on
0 Posts
03-22-2012, 05:41 PM
#24
03-22-2012, 06:44 PM
#25
this is based on no real facts apart from no-one reporting problems based on my memory in the last year or two, but i tend to think the silver coil thing is a myth anyway, so probably not ... but having 993 coils in the back would be a nice feeling
03-22-2012, 10:29 PM
#26
"but i tend to think the silver coil thing is a myth anyway"
Actually there were problems, but that was over five plus years ago.
I've verified a number of situations back then. Most likely Bosch fixed
the problem, as none have had problems for many years now.
Actually there were problems, but that was over five plus years ago.
I've verified a number of situations back then. Most likely Bosch fixed
the problem, as none have had problems for many years now.
03-23-2012, 12:02 AM
#27
03-23-2012, 01:48 AM
#29