202 Ignition Coil
Thread Starter
Burning Brakes
Joined: Sep 2001
Posts: 1,193
Likes: 194
From: East Coast
202 Ignition Coil
Found an old 202 Ignition coil on a back shelf today.
Measure the primary resistance at 1.9 ohms and seconardy at 12.23 ohms on 20K scale.
Expected primary to be .35-.55 ohms and seconday to be 8000-12000 ohms.
Is this coil good?
Measure the primary resistance at 1.9 ohms and seconardy at 12.23 ohms on 20K scale.
Expected primary to be .35-.55 ohms and seconday to be 8000-12000 ohms.
Is this coil good?
Last edited by Yellow6t7; Jul 26, 2020 at 12:15 PM.
Race Director
Joined: May 2006
Posts: 18,771
Likes: 2,596
The 202 is not listed as a TI coil but the low resistance values you listed are for a TI coil.
http://www.tispecialty.com/articles/article4.htm
http://www.tispecialty.com/articles/article4.htm
Race Director
Joined: May 2000
Posts: 12,712
Likes: 2,271
The ...202 coil was used with all single point ignitions beginning in '65 and also was the service replacement for earlier coils. Specs should be in the '65 Corvette Shop Manual Supplement and later CSMs.
As previously stated only the TI coils have primary resistance less than one ohm, so that ...202 coil is probably okay.
Duke
As previously stated only the TI coils have primary resistance less than one ohm, so that ...202 coil is probably okay.
Duke
Thread Starter
Burning Brakes
Joined: Sep 2001
Posts: 1,193
Likes: 194
From: East Coast
The ...202 coil was used with all single point ignitions beginning in '65 and also was the service replacement for earlier coils. Specs should be in the '65 Corvette Shop Manual Supplement and later CSMs.
As previously stated only the TI coils have primary resistance less than one ohm, so that ...202 coil is probably okay.
Duke
As previously stated only the TI coils have primary resistance less than one ohm, so that ...202 coil is probably okay.
Duke
Other places I've seen primary 1.24-1.46 and secondary 6500-9500 ohms.
Race Director
Joined: May 2000
Posts: 12,712
Likes: 2,271
I don't know if you're misreading because I don't know what your reading, but I ASSUME that the CSM specifications section should list coil specs by coil part number - one for the single point ignition (...202) and one for the TI system. What year CSM and what exactly does it say?
Duke
Duke
