Preferred COP's?
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Joined: May 2004
Posts: 936
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Originally Posted by keith w
I was just looking through threads on another site, and the guy who dyno tuned my Mustang has tried some of GMS coils on a couple of occasions and gave his personal dyno results. On a blown 05 GT he got pretty close to 25hp with most of the gain over 5000rpm, but a some under the curve. The coils leaned the A/F out .2, so he added fuel to get the A/F back and it settled at about 17hp peak gain. He did not have another set of plugs to experiment with opening the gap.
On an 06 Mustang GT naturally aspirated, the results were about what I would expect...1.5hp and 1.5 tq gain. The change was made over the course of 7 pulls, the car was up to temp and it was giving consistent numbers. Again, stock plugs and gap, just swapping coils.
On an 06 Mustang GT naturally aspirated, the results were about what I would expect...1.5hp and 1.5 tq gain. The change was made over the course of 7 pulls, the car was up to temp and it was giving consistent numbers. Again, stock plugs and gap, just swapping coils.
Elder User
Joined: Feb 2004
Posts: 772
Likes: 3
From: Mount Airy, MD
I installed the GMS coils on my V10 but haven't gotten it dynoed again to see if there has been any change. The main reason I got them is because I had a couple OEM one's go bad and the deal that I got on the GMS coils I couldn't pass up.
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tssngs75
1999 - 2016 Super Duty
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Dec 29, 2014 09:02 AM
