Do Sparkplugs and wires actually ad HP? - Ford Mustang Forum
 
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post #1 of 9 (permalink) Old 01-12-2010 Thread Starter
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Do Sparkplugs and wires actually ad HP?

Do Sparkplugs and Sparkplug wires actually ad HP. If so what can one expect, 5-10?
Anyone want to suggest what one would be looking at for 07 GT.
Thanks in advance!


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post #2 of 9 (permalink) Old 01-12-2010
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You don't have plug wires, you have what is called a coil-near-plug on each spark plug. Changing them won't improve a thing and will often cause more problems.



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post #3 of 9 (permalink) Old 01-12-2010
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Unless you are running a highly modified set up - I wouldn't mess with any of the factory coils or plugs... not much upside for all of the headaches I hear about.

Modifications may dictate that you use a hotter or colder plug - but aside from that, I would leave it alone.
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post #4 of 9 (permalink) Old 01-12-2010
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Quote:
Originally Posted by PriceFord View Post
Unless you are running a highly modified set up - I wouldn't mess with any of the factory coils or plugs... not much upside for all of the headaches I hear about.

Modifications may dictate that you use a hotter or colder plug - but aside from that, I would leave it alone.
+1 but i would also like to add a lot of 4.6 guys change their stock 2 piece plugs because they have been known to break off and get stuck inside the engine and need a $200 tool from Ford to get it out. Most solve this issue by replacing them with a 1 piece plug

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post #5 of 9 (permalink) Old 01-12-2010
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Quote:
Originally Posted by PriceFord View Post
Unless you are running a highly modified set up - I wouldn't mess with any of the factory coils or plugs... not much upside for all of the headaches I hear about.

Modifications may dictate that you use a hotter or colder plug - but aside from that, I would leave it alone.
There are plenty of guys running 600+ rwhp on the OEM COPs. They perform better than most aftermarket coils.

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post #6 of 9 (permalink) Old 01-12-2010
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+2 don't waist your money.


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post #7 of 9 (permalink) Old 01-12-2010
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+3

I suspect the people that get improvements are just picking the power they had lost with bad or worn out parts.

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post #8 of 9 (permalink) Old 01-12-2010 Thread Starter
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Thanks guys, Iíll put that money towards something worthwhile.

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post #9 of 9 (permalink) Old 01-21-2010
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I've seen better results from the addition of a "Jocko's Auto Parts" sticker... somewhere in the neighborhood of 3-4 hp improvements
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