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Discussion Starter #1
just got the issue and was reading about how they round the tip of the spark plug which in turn gives you more lowend power.

never heard of this.......does anyone out here do it?
 

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HHHMMMMMMMM

I think I'll have to get the ol zzzzz's wheel out. Time to start cutting. :cool:
 

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yes i find this interesting too. just incase some of you dont subscribe to MM&FF they give you an example showing an increase of almost 20ftlb of torque and 10 horespower at 2500 rpms. then it gradually declines to 0 gain at 5200 rpms. now it didnt gain any peak torque or horespower but the gains at 2500 rpms is something i could use on the street.
 

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I think i will try this out hte next time i work on my car, i can use every little bit i can get.
 

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Discussion Starter #12
hey brad what do you use to cut them with? i was thinking you could just grind them down with a pedastal grinder or something
 

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I had never heard of that before. Might be something cool to try if I have to pull plugs for anything. Maybe even a lazy afternoon "cheap upgrade". :)
 

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I changed my plugs today and cut the side electrodes on them and i can feel a better push against the seat now compared to the split-fires i had in. I'll test it at the track this weekend to see if i gained any real power from it.
 

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STREETPOWER EFI 331 said:
Thats interesting. So anybody tried it on a mild 302/306 type combo? Real world feedback?
Its worth horsepower, I've seen it with my own eyes on the dyno. Not really something for a street car but on a track only car its worth up to 5rwhp if done right.
 

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i use a pair of cutters to cut a mm or 2 off the electrode.. and a small grinder to cut the electrode in a knife shape V.... basically just grind the top so that the bottem is a sharp edge... round off the sharp points...

buy the book 1001 things you need to know about nitrous~!

i wouldnt do this on a NA car. but on nitrous motors it makes a difference
 

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Why not on an N/A car or a street car? Only because of accelerated wear or is there some other reason?
 

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since i was going to replace my plugs and wires anyway, i tried this yesterday. i sidegapped them like in the article Matt90GT posted, and set the gap at .055. i also replaced the motorcraft wires with FMS.
i can feel a difference. i was worried that .055 was too much for my stock ignition and coil, but it runs great.
 
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