Okay, guys. As part of my ongoing research project on the single point ignition I need the resistance value of the late ballast resistor.
In early '63 the "091" coil was used in conjunction with the 1931385 ballast resistor, which had been in use, it appears, since the first 12V system in '55. As a running change for the 250 and 300 horsepower engines the coil and resistor were changed to the "087" and 1957154 respectively, however, SHP and FI engines continued with the early combination. The change in parts for the base engine shows up as a change to the '63 AIM Sect. 7 Sheet 7.00 on 2-12-63. The 091/385 coil/resistor combination continued through '64 for SHP and FI, while the 087/154 combo continued for the base and HP engines through '64. In '65 the 087 coil was replaced with the 202 coil, which had very similar electrical specs. The 202 was used for all point ignition applications and became a service replacement for all previous 12V coils. The 154 ballast continued through '67, but was replaced (I believe) by a resistance wire in the harness beginning in '68. (Of course, none of this applies to K66)
So, now that you have enjoyed this bit of historical trivia and/or are confused and disinterested, here is my question. What is the resistance value for the late (154) ballast resistor? My '63 lists the ballast as 1.4 to 1.62 ohms, and I assume this applies to the 385 ballast since it was used across the board in early '63 when the shop manual was printed. For those of you with a '64 to '67 shop manual it should have different values. Can you check them for me and post the value(s) along with the source. They should be listed in the specifications for section 6Y,
BTW, the 385 resistor is listed in my parts catalog as having .03 ohms, which is an obvious error. This is the resistor with the black dot. The 154 resistor is listed at 1.8 ohms, but the shop manual may list a different value or a range since the resistance varied somewhat with temperature. The 154 is identified with a blue stripe. This relatively crude indentification scheme was used to differentiate the resistors visually as they had no other distinguishing characteristics. The only difference was in the detail of the resistance wires to obtain the different values. All your input is greatly appreciated.
Duke
In early '63 the "091" coil was used in conjunction with the 1931385 ballast resistor, which had been in use, it appears, since the first 12V system in '55. As a running change for the 250 and 300 horsepower engines the coil and resistor were changed to the "087" and 1957154 respectively, however, SHP and FI engines continued with the early combination. The change in parts for the base engine shows up as a change to the '63 AIM Sect. 7 Sheet 7.00 on 2-12-63. The 091/385 coil/resistor combination continued through '64 for SHP and FI, while the 087/154 combo continued for the base and HP engines through '64. In '65 the 087 coil was replaced with the 202 coil, which had very similar electrical specs. The 202 was used for all point ignition applications and became a service replacement for all previous 12V coils. The 154 ballast continued through '67, but was replaced (I believe) by a resistance wire in the harness beginning in '68. (Of course, none of this applies to K66)
So, now that you have enjoyed this bit of historical trivia and/or are confused and disinterested, here is my question. What is the resistance value for the late (154) ballast resistor? My '63 lists the ballast as 1.4 to 1.62 ohms, and I assume this applies to the 385 ballast since it was used across the board in early '63 when the shop manual was printed. For those of you with a '64 to '67 shop manual it should have different values. Can you check them for me and post the value(s) along with the source. They should be listed in the specifications for section 6Y,
BTW, the 385 resistor is listed in my parts catalog as having .03 ohms, which is an obvious error. This is the resistor with the black dot. The 154 resistor is listed at 1.8 ohms, but the shop manual may list a different value or a range since the resistance varied somewhat with temperature. The 154 is identified with a blue stripe. This relatively crude indentification scheme was used to differentiate the resistors visually as they had no other distinguishing characteristics. The only difference was in the detail of the resistance wires to obtain the different values. All your input is greatly appreciated.
Duke
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