63 coil
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Joined: Mar 2005
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From: Auburn, WA
63 coil
I have decided to return my 63 340HP back to original ignition. Does anyone know what the correct coil is I need? I've come across a couple for the 250/300 HP but if I'm going down this road, what to get it right or as close as possible.
Thanks
Thanks
Race Director
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From: Bowling Green, Kentucky
Early 1963 cars, Delco-Remy #1115091. Later 1963 coils D_R #1115087. This is for standard ignition for all engines.
They are available used if you search. DO NOT buy reproductions.
Larry
They are available used if you search. DO NOT buy reproductions.
Larry
Le Mans Master
Joined: May 2005
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From: Central Maryland
Good info. Thanks for posting it. Does anyone know with which VIN the change was made, or how to determine which should be used? I presume it's a matter of the ballast resistor value? (And if, so, which value is appropriate for which coil?)
TIA.
Live well,
SJW
TIA.
Live well,
SJW
Race Director
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At start of production ALL four '63 Corvette engines used the 091 coil along with the 0.3 ohm ballast. Around mid production the 250 and 300 HP coil and ballast where changed to the 087 and 1,8 ohm. A TSB was issued, and I've seen it but don't recall the date. The AIM, Sect 6 Sheet C7.00, change record for the above is dated 2/17/1963.
Mechanical lifter engines with single point ignitions continued with the 091/0.3 ohm coil/ballast through the end of '64 production. For '65 all single point ignitions got the new ...202 coil with the 1.8 ohm ballast.
Duke
Mechanical lifter engines with single point ignitions continued with the 091/0.3 ohm coil/ballast through the end of '64 production. For '65 all single point ignitions got the new ...202 coil with the 1.8 ohm ballast.
Duke
Last edited by SWCDuke; Jun 21, 2021 at 01:38 PM.
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From: Beverly Hills/Pine Ridge Florida
At start of production ALL four '63 Corvette engines used the 091 coil along with the 0.3 ohm ballast. Around mid production the 250 and 300 HP coil and ballast where changed to the 087 and 1,8 ohm. A TSB was issued, and I've seen it but don't recall the date. The AIM, Sect 6 Sheet C7.00, change record for the above is dated 2/17/1963.
Mechanical lifter engines with single point ignitions continued with the 091/0.3 ohm coil/ballast through the end of '64 production. For '65 all single point ignitions got the new ...202 coil with the 1.8 ohm ballast.
Duke
Mechanical lifter engines with single point ignitions continued with the 091/0.3 ohm coil/ballast through the end of '64 production. For '65 all single point ignitions got the new ...202 coil with the 1.8 ohm ballast.
Duke
I might add that finding an original 091 coil is tough. It's like looking for the Holy Grail.
AND, if you want to get real technical, there are/were 2 types of 091 coils used in 63. Has to do with the presence of absence of two buttresses on the coil tower.
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Joined: Mar 2005
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From: Auburn, WA
Well that's not good news, I guess the hunt begins. I really wish who ever had swapped out this stuff would have thought twice but I remember back in the day nobody cared much about originality. So anybody that has all the 091 coils sitting on shelf are free to reach out.
Thank you guys. This is what I was looking for
Thank you guys. This is what I was looking for
Race Director
Joined: Apr 2005
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From: Bowling Green, Kentucky
Well that's not good news, I guess the hunt begins. I really wish who ever had swapped out this stuff would have thought twice but I remember back in the day nobody cared much about originality. So anybody that has all the 091 coils sitting on shelf are free to reach out.
Thank you guys. This is what I was looking for
Thank you guys. This is what I was looking for
No one except you and a select few will know the difference.
Larry
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I don't think I was aware of that, Chuck, but I clearly can see the difference in the photos. Also, do you know about when the second design was installed by Flint, and as with many changes the old and new designs may have both been in use until inventory of the old design was fully depleted.
Duke
Duke
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Joined: Mar 2005
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From: Auburn, WA
I would like to have the judged in the future, It seemed like I was close on so much. I'll keep chipping away at what I have left and hopefully this coil won't be my downfall.
Thanks everyone
Thanks everyone
Burning Brakes
Joined: Oct 2010
Posts: 1,142
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From: crown point in
Duke is 100% correct.
I might add that finding an original 091 coil is tough. It's like looking for the Holy Grail.
AND, if you want to get real technical, there are/were 2 types of 091 coils used in 63. Has to do with the presence of absence of two buttresses on the coil tower.
I might add that finding an original 091 coil is tough. It's like looking for the Holy Grail.
AND, if you want to get real technical, there are/were 2 types of 091 coils used in 63. Has to do with the presence of absence of two buttresses on the coil tower.
Last edited by scopeli; Jun 22, 2021 at 03:45 AM.
Race Director
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From: Beverly Hills/Pine Ridge Florida
I don't think I was aware of that, Chuck, but I clearly can see the difference in the photos. Also, do you know about when the second design was installed by Flint, and as with many changes the old and new designs may have both been in use until inventory of the old design was fully depleted.
Duke
Duke
Race Director
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From: Beverly Hills/Pine Ridge Florida
Original embossed on the bottom of the can
Repro embossed on the top of the can.
Drifting
Joined: Jun 2001
Posts: 1,336
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From: Massachusetts
I can't accurately answer your questions Duke and Scopeli. It has been my understanding that early 63's got the first design without the buttresses. IIRC, that 091 coil was used beginning in 1957. I do not know when the second design coil with the buttresses started to show up in production.