The Duratec Sparkplug Sticky

[whynotthinkwhynot]

We had dynos of the AR103s showing a 4 hp increase over some expensive designer iridium plug. I can't remember what it was. I don't know if it will be more or less of an increase over the factory plug.

Did you check RockAuto? We get a 5% discount from them, and if you're ordering something else to spread out the shipping- I noticed they do have really good prices on plugs. I ordered some APPs for the wifes van a while back and those were like $2-3 about half price of what you'd pay in a store. It might not be worth it if you're only ordering one part though.

OK no, they don't have it.

[CamoCustom]

Originally Posted by Motor City Madman

I can get the AR 103s from Advance Auto Parts online for about $9 with a 20% discount coupon and pick them up at my local store and they are in stock. Bottom line, can you actually feel this 4-5 hp increase? I have a stock '09 with only 11k miles on it. If there is a somewhat noticable difference, then I'd do it. What do you think?

Is that $9 for all 4? I show them on Advance.com for $3.49 each...

[Motor City Madman]

http://shop.advanceautoparts.com/web...%7CGRP2041____

$2.69 each x 4 = $10.76 x 20% off coupon = $8.61

[CamoCustom]

Originally Posted by Motor City Madman

http://shop.advanceautoparts.com/web...%7CGRP2041____

$2.69 each x 4 = $10.76 x 20% off coupon = $8.61

Must be location, I followed your link, and it still shows me $3.49 still, only $12 bucks, I think i can swing it.

[J-Town_2006ZX3]

What do you know, just got dyno'd @ Walsh Motorsports and I asked them what kind of plugs to change with as I am doing it for the first time.

They said Autolite or NGK Coopers.........

[J-Town_2006ZX3]

Ah crap, can't even spell. (Epic fail for me )

Coppers.

[oblivion2kx]

Originally Posted by J-Town_2006ZX3

What do you know, just got dyno'd @ Walsh Motorsports and I asked them what kind of plugs to change with as I am doing it for the first time.

They said Autolite or NGK Coopers.........

GOOD now can we please just CLOSE THIS THREAD.

[Chris951]

Not trying to bash, but you stated to pt the factory plugs in your vehicle but you are telling everyone to put copper plugs in their vehicels? sounds kind of redundant to me. Autolite makes the best plug, period. I pulled motorcraft platinums out and threw some Autolite double platinums back in. It was running great and is still running great if not better now after the autolite double platinums.

The only reason I would run copper plug if i was driving a race car or if i had some type of forced induction or nitrous. So lets face it. This is a focus website and a big majority of people's focus on this website are not race cars. you are not going to squeeze out more power by using copper plugs. no noticable gains will be had. why not just put in what they were designed for?

[wickedgreyzx3]

I certainly would say 5hp is a noticable gain.

And if you would have read the original post you wouldn't be making idiotic comments and making yourself look like a fool.

And also, while we may not be the majority there are A LOT of people running copper spark plugs in the Focuses now.

[oblivion2kx]

Originally Posted by wickedgreyzx3

I certainly would say 5hp is a noticable gain.

And if you would have read the original post you wouldn't be making idiotic comments and making yourself look like a fool.

And also, while we may not be the majority there are A LOT of people running copper spark plugs in the Focuses now.

X2

I've tried autolite plats for 20k VS autolite coppers for 15K and overall .. coppers give my car more pep.