internal coil to an external coil
Thread Starter
Supreme Member
Joined: Sep 2001
Posts: 2,308
Likes: 2
From: winthrop harbor, il & plymouth, il
Car: 1986 camaro
Engine: 383 sbc
Transmission: th-400
Axle/Gears: 4th Gen 10 bolt/Detroit TrueTrac 4.
internal coil to an external coil
i have an internal coiled hei and i want to convert it to an external. can i do this? is it just a cap or what is all entailed in it?
Sparty,
I believe you'll have to change the connector to the distributor cap, or adapt the primary connections to the external coil. Obviously, the cap and rotor will have to be changed, unless you want to install the MSD modifird HEI dust cover/adapter (P/N 8401). They're about $28 and complete the HV circuit for a separate coil to a standard HEI distributor.

http://www.northernautoparts.com/Pro...ctModelId=5317
http://store.summitracing.com/partdetail.asp?part=9033
I believe you'll have to change the connector to the distributor cap, or adapt the primary connections to the external coil. Obviously, the cap and rotor will have to be changed, unless you want to install the MSD modifird HEI dust cover/adapter (P/N 8401). They're about $28 and complete the HV circuit for a separate coil to a standard HEI distributor.

http://www.northernautoparts.com/Pro...ctModelId=5317
http://store.summitracing.com/partdetail.asp?part=9033
Member
Joined: Jan 2002
Posts: 461
Likes: 0
From: chico, cali
Car: 92 camaro Rs
Engine: 305 tpi
Transmission: t-5 WC
so its possible to go from int. coil to ext. coil but is that true vise versa?? I would like to put a large cap dist in my maro that is a 92 Would this be possible with just splicing?
Thread Starter
Supreme Member
Joined: Sep 2001
Posts: 2,308
Likes: 2
From: winthrop harbor, il & plymouth, il
Car: 1986 camaro
Engine: 383 sbc
Transmission: th-400
Axle/Gears: 4th Gen 10 bolt/Detroit TrueTrac 4.
hey thanks vader. i was looking for something like that. are there any pros and cons to doing this. i was looking for something a little more attractive to my engine that the funky looking internal coil cap as to why i was wanting to switch to external.
Member
Joined: Jan 2002
Posts: 461
Likes: 0
From: chico, cali
Car: 92 camaro Rs
Engine: 305 tpi
Transmission: t-5 WC
cons: your wire terminals will be closer and you will have more of a chance of ionazation and crossfire inside the cap, Large cap is better performance but the small cap ext. coil does look better.
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