Ls3 coils on ls1
Thread Starter
Racer
Joined: May 2009
Posts: 340
Likes: 0
From: Santa Rosa Calif
Ls3 coils on ls1
I am putting ls3 coils on my ls1. I am doing some mods and katech coil relocate. The ls3 coils look cleaner after install. My question is, I have the a new GM harness adapter and coils.The adapter has a small plastic box around it to clip to the stock brackets. How do I tell which is the front to the back.The plug only goes one way,but you can flip the 4 inputs over.Don't want to find out the hard way.
Burning Brakes
Joined: Mar 2011
Posts: 1,048
Likes: 5
From: Metairie LA
Was told by MSD that LS3 coils will NOT work on a LS1 engine, even if you figure out how to connect them. Something about coil "frequency" or such. You need LS1 coils, although I've read of some using "truck" coils, but I suspect they are LS1 design with different output.
Thread Starter
Racer
Joined: May 2009
Posts: 340
Likes: 0
From: Santa Rosa Calif
No problem with compatibility, Lots of shops and guys do this all the time, just trying to find out front to back on the 4 inputs on new harness
Last edited by robs68; Dec 16, 2012 at 01:41 PM. Reason: info
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Was told by MSD that LS3 coils will NOT work on a LS1 engine, even if you figure out how to connect them. Something about coil "frequency" or such. You need LS1 coils, although I've read of some using "truck" coils, but I suspect they are LS1 design with different output.
HTH
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Thread Starter
Racer
Joined: May 2009
Posts: 340
Likes: 0
From: Santa Rosa Calif
The coils I have are Delphi #12573190 and or D514A. These will work on ls1 with the adapter I have.They will also work on ls 2,3,4,7 and x . I guess I will have to peel back the loom and try to do it that way. Just thought someone might know the answer to my original question.
Last edited by robs68; Dec 16, 2012 at 01:43 PM.
Thread Starter
Racer
Joined: May 2009
Posts: 340
Likes: 0
From: Santa Rosa Calif
Well it looks like the only common wire is 1 red wire on front of drivers side and 1 red wire on the rear passenger side. Still not totally comfortable yet . If anyone knows for sure please chime in. Thanks
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