Aftermarket LS Engine Ignition Coils
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 887
Likes: 10
From: Ontario New York
Aftermarket LS Engine Ignition Coils
Has anyone found an aftermarket LS engine ignition coil that has better real world performance then the OEM?
FAST now has the XR-1A. they state 44,000 volt output
SOS Sultans of Spark states their coil has a 28,000 volt output .
Granatelli states his coils have 85,000 volt output
MSD states the coil output voltage at 44,000.
Pricing from $500 to $800.
OEM coil as per SOS has a 21,000 volt output
My engine builder and tuner said that the OEM is all that is needed unless you have 1500 HP 30 psi boosted race engine.
FAST now has the XR-1A. they state 44,000 volt output
SOS Sultans of Spark states their coil has a 28,000 volt output .
Granatelli states his coils have 85,000 volt output
MSD states the coil output voltage at 44,000.
Pricing from $500 to $800.
OEM coil as per SOS has a 21,000 volt output
My engine builder and tuner said that the OEM is all that is needed unless you have 1500 HP 30 psi boosted race engine.
Last edited by C6RAPTOR; Aug 13, 2015 at 05:23 PM.
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 887
Likes: 10
From: Ontario New York
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 887
Likes: 10
From: Ontario New York
I would assume someone has performed tests to see if more voltage & wider gap will increase performance. This is the reason I started this post to see if there was any real world tests out there.
The advertisement for the FAST XR-1A LS high output coils states that the coils were designed specially for high compression, boosted or nitrous equipped application making MORE THAN 1000 HP. It sounds like FAST is being honest in stating (in other words) engines below 1000 HP stick with OEM.
I am dealing with a 12.4:1 C.R. (high compression ratio ?) only 650 HP and NGK said to run the gap on my TR8IX plugs at .038" - .040"
Last edited by C6RAPTOR; Aug 14, 2015 at 08:44 AM.
Former Vendor
Joined: Aug 2005
Posts: 16,897
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From: Lewisville TX
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
Only time we have seen a need is really high boosted cars or large nitrous applications. All of the race cars ran OEM coils without any issues. Never had any problems even at 20psi of boost and having them blow out a spark plug.
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Former Vendor
Joined: Aug 2005
Posts: 16,897
Likes: 412
From: Lewisville TX
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 887
Likes: 10
From: Ontario New York
I just received this in an email from J.R.Granatelli:
Granateli said that the COPO comes standard with his coils. GM tests showed they picked up 1.2 mph which they equated to 17hp at the rear wheels.
Gary
Former Vendor
Joined: Aug 2005
Posts: 16,897
Likes: 412
From: Lewisville TX
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
I would have to get another car here in the shop but the last one in had GM PN's on them.
Race Director
Joined: Aug 2005
Posts: 13,592
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From: Hudson WI
NCM Sinkhole Donor
Like I said, if you are looking for support on the forum to buy they, you will have a long wait. Like I said, if you want them, buy them and move on. Who cares what others think.
COPO Camaro spec sheet, LS7 coils.
http://www.dragzine.com/features/car...heet-released/
Last edited by timd38; Aug 14, 2015 at 05:33 PM.
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 887
Likes: 10
From: Ontario New York
Yup, and his spark plug wires are worth another 30HP! Search the web and you will find the info to support form Granatelli.
Like I said, if you are looking for support on the forum to buy they, you will have a long wait. Like I said, if you want them, buy them and move on. Who cares what others think.
Like I said, if you are looking for support on the forum to buy they, you will have a long wait. Like I said, if you want them, buy them and move on. Who cares what others think.
On the other hand there is always room to improve performance. This improvement process normally involves weeding out the BS..
Thanks for the COPO specs. I will send it to Granatelli.
Last edited by C6RAPTOR; Aug 14, 2015 at 05:51 PM.
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 887
Likes: 10
From: Ontario New York
Feedback from someone that has real world experience.
I will call your friend. The web site does not have an email address.
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
M&M = They build his engines, ask them about the destroked 350ci that shifts at 8500, I have not been there in a few years for any engine work.
BUT, as others (LG) has mentioned, if you are shifting at 7k or lower, new coils are not required.